Sample records for imaging applications part

  1. General Adaptive Neighborhood Image Processing Part II: Practical Application Examples

    E-print Network

    Paris-Sud XI, Université de

    General Adaptive Neighborhood Image Processing Part II: Practical Application Examples JOHAN-called General Adaptive Neighborhood Image Processing (GANIP) approach is presented in a two parts paper dealing, theoretically introduced in Part I [20], allows the building of new image processing transformations using

  2. Magnetic Resonance Imaging Part II—Clinical Applications

    PubMed Central

    Hendee, William R.; Morgan, Christopher J.

    1984-01-01

    Magnetic resonance (MR) imaging is the most promising new technology to appear in the clinical imaging arena since the advent of x-ray transmission computed tomography in the early 1970s. Five independent tissue characteristics (spin density, spin-lattice and spin-spin relaxation times, flow and spectral shift information) are accessible to MR imaging, and their relative influence in the magnetic resonance image can be varied by appropriate selection of pulse sequences and pulse times. All major organ systems appear to be amenable to MR imaging, and some are revealed with superior definition compared with their appearance in images obtained by alternate imaging technologies. Of particular interest is the superior contrast resolution in MR images of the brain and spinal cord, and the absence of bone- and motion-induced artifacts in images of the abdomen and pelvis. Applications of MR imaging to the heart and great vessels are just developing, as are new types of contrast agents for use in MR imaging. In vivo chemical spectroscopic measurements by magnetic resonance are heralded by some investigators as the most significant contribution that magnetic resonance will make ultimately to clinical diagnosis. At present, the number of MR imaging units is extremely low, and clinical studies are proceeding at a slow rate. Nevertheless, it is possible to provide a preliminary evaluation of the usefulness of MR imaging in a variety of clinical applications. This article is such an evaluation, tempered by the acknowledgement that much additional work remains to be done. Images PMID:6516335

  3. Cardiac Magnetic Resonance Imaging for the Investigation of Cardiovascular Disorders. Part 1: Current Applications

    PubMed Central

    Goenka, Ajit H.

    2014-01-01

    Cardiac magnetic resonance imaging is a robust noninvasive technique for investigating cardiovascular disorders. The evolution of cardiac magnetic resonance and its widening span of diagnostic and prognostic applications have generated excitement as well as uncertainty regarding its potential clinical use and its role vis-à-vis conventional imaging techniques. The purpose of this evidence-based review is to discuss some of these issues by highlighting the current (Part 1) and emerging (Part 2) applications of cardiac magnetic resonance. Familiarity with the versatility and usefulness of cardiac magnetic resonance will facilitate its wider clinical acceptance for improving the management of cardiovascular disorders. PMID:24512394

  4. A review of breast tomosynthesis. Part II. Image reconstruction, processing and analysis, and advanced applications

    PubMed Central

    Sechopoulos, Ioannis

    2013-01-01

    Many important post-acquisition aspects of breast tomosynthesis imaging can impact its clinical performance. Chief among them is the reconstruction algorithm that generates the representation of the three-dimensional breast volume from the acquired projections. But even after reconstruction, additional processes, such as artifact reduction algorithms, computer aided detection and diagnosis, among others, can also impact the performance of breast tomosynthesis in the clinical realm. In this two part paper, a review of breast tomosynthesis research is performed, with an emphasis on its medical physics aspects. In the companion paper, the first part of this review, the research performed relevant to the image acquisition process is examined. This second part will review the research on the post-acquisition aspects, including reconstruction, image processing, and analysis, as well as the advanced applications being investigated for breast tomosynthesis. PMID:23298127

  5. Image registration by parts

    NASA Technical Reports Server (NTRS)

    Chalermwat, Prachya; El-Ghazawi, Tarek; LeMoigne, Jacqueline

    1997-01-01

    In spite of the large number of different image registration techniques, most of these techniques use the correlation operation to match spatial image characteristics. Correlation is known to be one of the most computationally intensive operations and its computational needs grow rapidly with the increase in the image sizes. In this article, we show that, in many cases, it might be sufficient to determine image transformations by considering only one or several parts of the image rather than the entire image, which could result in substantial computational savings. This paper introduces the concept of registration by parts and investigates its viability. It describes alternative techniques for such image registration by parts and presents early empirical results that address the underlying trade-offs.

  6. Image Restoration by the Method of Convex Projections: Part 2Applications and Numerical Results

    Microsoft Academic Search

    M. I. Sezan; H. Stark

    1982-01-01

    The image restoration theory discussed in a previous paper by Youla and Webb [1] is applied to a simulated image and the results compared with the well-known method known as the Gerchberg-Papoulis algorithm. The results show that the method of image restoration by projection onto convex sets, by providing a convenient technique for utilizing a priori information, performs significantly better

  7. Fast Algorithm for Detecting the Most Unusual Part of 2d and 3d Digital Images. Application to Large Medical Databases

    Microsoft Academic Search

    KOSTADIN KOROUTCHEV; ELKA KORUTCHEVA

    s Abstract: In this paper we introduce a fast algorithm that can detect the most unusual part of a digital image. The most unusual part of a given shape is dened as a part of the image that has the maximal distance to all non intersecting shapes with the same form. The method is tested on two and three-dimensional images

  8. Neutron Imaging and Applications

    SciTech Connect

    Anderson, Ian S [ORNL; McGreevy, Robert L [ORNL; Bilheux, Hassina Z [ORNL

    2009-04-01

    Neutron Imaging and Applications offers an introduction to the basics of neutron beam production and instrumentation in addition to the wide scope of techniques that provide unique imaging capabilities over a broad and diverse range of applications. An instructional overview of neutron sources, optics and detectors, allows readers to delve more deeply into the discussions of radiography, tomography, phase contrast imaging and prospective applications using advanced neutron holography techniques and polarized beams. A section devoted to overviews in a growing range of applications describes imaging of fuel cells and hydrogen storage devices for a robust hydrogen economy; new directions in material science and engineering; the investigation of precious artifacts of cultural heritage importance; determination of plant physiology and growth processes; imaging of biological tissues and macromolecules, and the practical elements of neutron imaging for homeland security and contraband detection. Written by key experts in the field, researchers and engineers involved with imaging technologies will find Neutron Imaging and Applications a valuable reference.

  9. Aesthetic Pursuits: Windows, Frames, Words, Images--Part II

    ERIC Educational Resources Information Center

    Burke, Ken

    2005-01-01

    In Part I of this study (Burke, 2005), the author presented the essentials of Image Presentation Theory--IPT--and its application to the analytical explication of various spatial designs in and psychological responses to images, from the illusions of depth in what is referred to as "windows" in cinema theory to the more patterned abstractions of…

  10. Optimizing technology development and adoption in medical imaging using the principles of innovation diffusion, part II: practical applications.

    PubMed

    Reiner, Bruce I

    2012-02-01

    Successful adoption of new technology development can be accentuated by learning and applying the scientific principles of innovation diffusion. This is of particular importance to areas within the medical imaging practice which have lagged in innovation; perhaps, the most notable of which is reporting which has remained relatively stagnant for over a century. While the theoretical advantages of structured reporting have been well documented throughout the medical imaging community, adoption to date has been tepid and largely relegated to the academic and breast imaging communities. Widespread adoption will likely require an alternative approach to innovation, which addresses the heterogeneity and diversity of the practicing radiologist community along with the ever-changing expectations in service delivery. The challenges and strategies for reporting innovation and adoption are discussed, with the goal of adapting and customizing new technology to the preferences and needs of individual end-users. PMID:21769690

  11. Use of modulated excitation signals in medical ultrasound. Part II: design and performance for medical imaging applications

    Microsoft Academic Search

    Thanassis Misaridis; Jørgen Arendt Jensen

    2005-01-01

    For pt.I, see ibid., vol.52, no.2, p.177-91 (2005). In the first paper, the superiority of linear FM signals was shown in terms of signal-to-noise ratio and robustness to tissue attenuation. This second paper in the series of three papers on the application of coded excitation signals in medical ultrasound presents design methods of linear FM signals and mismatched filters, in

  12. Hyperspectral image projector applications

    NASA Astrophysics Data System (ADS)

    Rice, Joseph P.; Brown, Steven W.; Allen, David W.; Yoon, Howard W.; Litorja, Maritoni; Hwang, Jeeseong C.

    2012-03-01

    For the past several years NIST has been developing, along with several collaborators, a Hyperspectral Image Projector (HIP). This scene projector produces high-resolution programmable spectra and projects them into dynamic two-dimensional images. The current digital micromirror device (DMD) based HIP prototype has a spatial resolution of 1024 x 768 pixels and a spectral range of 450 nm to 2400 nm, with spectral resolution from 2 nm in the visible to 5 nm in the short-wave infrared. It disperses light from a supercontinuum fiber source across two DMDs to produce the programmable spectra, which then globally-illuminate a third DMD to form the spatial images. The HIP can simulate top-of-the atmosphere spectral radiance over a 10 mm x 14 mm, f/3 image, and this can be collimated to stimulate remote sensing instruments. Also, the spectral radiance of the projected scenes can be measured with a NIST-calibrated spectroradiometer, such that the spectral radiance projected into each pixel can be accurately known. The HIP was originally developed for applications in multi-spectral and hyperspectral imager testing, calibration, and performance validation, and examples of this application will be reviewed. Conceivable applications for the HIP in photovoltaic device characterization and optical medical imaging will also be discussed.

  13. Nanotechnology and its Relationship to Interventional Radiology. Part I: Imaging

    SciTech Connect

    Power, Sarah; Slattery, Michael M.; Lee, Michael J., E-mail: mlee@rcsi.ie [Beaumont Hospital, Department of Radiology (Ireland)

    2011-04-15

    Nanotechnology refers to the design, creation, and manipulation of structures on the nanometer scale. Interventional radiology stands to benefit greatly from advances in nanotechnology because much of the ongoing research is focused toward novel methods of imaging and delivery of therapy through minimally invasive means. Through the development of new techniques and therapies, nanotechnology has the potential to broaden the horizon of interventional radiology and ensure its continued success. This two-part review is intended to acquaint the interventionalist with the field of nanotechnology, and provide an overview of potential applications, while highlighting advances relevant to interventional radiology. Part I of the article deals with an introduction to some of the basic concepts of nanotechnology and outlines some of the potential imaging applications, concentrating mainly on advances in oncological and vascular imaging.

  14. 3D Imaging Technology Conference & Applications Workshop

    E-print Network

    Aristomenis, Antoniadis

    2nd London 3D Imaging Technology Conference & Applications Workshop 3D scanning and vertical, Greece, bilalis@dpem.tuc.gr Abstract. The new 3D scanning technology had changed the way and opened new from some 3D scanning approaches, which were applied for the first time in the southern part of Europe

  15. Image Processing Applications: An Overview

    PubMed Central

    Greberman, Melvyn

    1984-01-01

    Improved methods of image display, transmission, enhancement, and archiving are of increasing importance to medical scientists and practitioners. The dynamic range of computed tomographic imaging fostered widespread interest among radiologists with respect to the clinical contributions of other digital imaging modalities. The application of digital imaging techniques in pathology also promises to show continued growth because of the high image content of that specialty. Newer methods of image display offer improved three dimensional visualization of anatomic structures; such techniques will find increasing use in teaching anatomy and in surgical planning. The papers at this session will present new applications of image processing techniques. The similarity of issues in image processing across medical specialty boundaries is stressed.

  16. An Ultrasonic-Adaptive Beamforming Method and Its Application for Trans-skull Imaging of Certain Types of Head Injuries; Part I: Transmission Mode.

    PubMed

    Shapoori, Kiyanoosh; Sadler, Jeff; Wydra, Adrian; Malyarenko, Eugene V; Sinclair, Anthony N; Maev, Roman Gr

    2015-05-01

    A new adaptive beamforming algorithm for imaging via small-aperture 1-D ultrasonic-phased arrays through composite layered structures is reported. Such structures cause acoustic phase aberration and wave refraction at undulating interfaces and can lead to significant distortion of an ultrasonic field pattern produced by conventional beamforming techniques. This distortion takes the form of defocusing the ultrasonic field transmitted through the barrier and causes loss of resolution and overall degradation of image quality. To compensate for the phase aberration and the refractional effects, we developed and examined an adaptive beamforming algorithm for small-aperture linear-phased arrays. After accurately assessing the barrier's local geometry and sound speed, the method calculates a new timing scheme to refocus the distorted beam at its original location. As a tentative application, implementation of this method for trans-skull imaging of certain types of head injuries through human skull is discussed. Simulation and laboratory results of applying the method on skull-mimicking phantoms are presented. Correction of up to 2.5 cm focal point displacement at up to 10 cm depth under our skull phantom is demonstrated. Quantitative assessment of the method in a variety of temporal focusing scenarios is also reported. Overall temporal deviation on the order of a few nanoseconds was observed between the simulated and experimental results. The single-point adaptive focusing results demonstrate strong potential of our approach for diagnostic imaging through intact human skull. The algorithms were implemented on an ultrasound advanced open-platform controlling 64 active elements on a 128-element phased array. PMID:25423646

  17. Applications of Molecular Imaging

    PubMed Central

    Galbán, Craig; Galbán, Stefanie; Van Dort, Marcian; Luker, Gary D.; Bhojani, Mahaveer S.; Rehemtualla, Alnawaz; Ross, Brian D.

    2015-01-01

    Today molecular imaging technologies play a central role in clinical oncology. The use of imaging techniques in early cancer detection, treatment response and new therapy development is steadily growing and has already significantly impacted clinical management of cancer. In this chapter we will overview three different molecular imaging technologies used for the understanding of disease biomarkers, drug development, or monitoring therapeutic outcome. They are (1) optical imaging (bioluminescence and fluorescence imaging) (2) magnetic resonance imaging (MRI), and (3) nuclear imaging (e.g, single photon emission computed tomography (SPECT) and positron emission tomography (PET)). We will review the use of molecular reporters of biological processes (e.g. apoptosis and protein kinase activity) for high throughput drug screening and new cancer therapies, diffusion MRI as a biomarker for early treatment response and PET and SPECT radioligands in oncology. PMID:21075334

  18. 5 CFR 2424.1 - Applicability of this part.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Applicability of this part. 2424.1 Section...AUTHORITY NEGOTIABILITY PROCEEDINGS Applicability of This Part and Definitions § 2424.1 Applicability of this part. This part is...

  19. Molecular Imaging Applications in Nanomedicine

    Microsoft Academic Search

    King C. P. Li; Sunil D. Pandit; Samira Guccione; Mark D. Bednarski

    2004-01-01

    The purpose of this article is to explore how molecular imaging techniques can be used as useful adjunts in the development of “nanomedicine” and in personalizing treatment of patients. The discussion focuses on in vivo applications at the whole organism level even though imaging can also play an important role in research at the cellular and subcellular level.

  20. Application of panospheric imaging to a teleoperated lunar rover

    Microsoft Academic Search

    John R. Murphy

    1995-01-01

    Both vehicle teleoperation effectiveness and on-looker interest is enhanced through the availability of omnidirectional images. For the application of a lunar rover, panospheric imaging has advantages over traditional methods for acquiring a panoramic view. By eliminating moving parts, panospheric imaging and radial camera arrays are more reliable than pan\\/tilt or panoramic cameras. The wide field of view captured by panospheric

  1. EDGE-PRESERVING IMAGE RECONSTRUCTION FOR COHERENT IMAGING APPLICATIONS

    E-print Network

    Willsky, Alan S.

    images [1], and reconstruction in X-ray tomography [2]. Coherent image reconstruction poses additionalEDGE-PRESERVING IMAGE RECONSTRUCTION FOR COHERENT IMAGING APPLICATIONS M¨ujdat C¸etin , William C experimental results from three coherent imaging applications: digital holography, synthetic aperture radar

  2. 19 CFR 210.1 - Applicability of part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 2010-04-01 2010-04-01 false Applicability of part. 210.1 Section 210.1 Customs...ADJUDICATION AND ENFORCEMENT Rules of General Applicability § 210.1 Applicability of part. The rules in this part apply...

  3. Applications Of Binary Image Analysis Techniques

    NASA Astrophysics Data System (ADS)

    Tropf, H.; Enderle, E.; Kammerer, H. P.

    1983-10-01

    After discussing the conditions where binary image analysis techniques can be used, three new applications of the fast binary image analysis system S.A.M. (Sensorsystem for Automation and Measurement) are reported: (1) The human view direction is measured at TV frame rate while the subject's head is free movable. (2) Industrial parts hanging on a moving conveyor are classified prior to spray painting by robot. (3) In automotive wheel assembly, the eccentricity of the wheel is minimized by turning the tyre relative to the rim in order to balance the eccentricity of the components.

  4. MULTISPECTRAL DETECTION OF FECAL CONTAMINATION ON APPLES BASED ON HYPERSPECTRAL IMAGERY: PART I. APPLICATION OF VISIBLE AND NEAR-INFRARED REFLECTANCE IMAGING

    Microsoft Academic Search

    M. S. Kim; A. M. Lefcourt; K. Chao; Y. R. Chen; I. Kim; D. E. Chan

    Fecal contamination of apples is an important food safety issue. To develop automated methods to detect such contamination, a recently developed hyperspectral imaging system with a range of 450 to 851 nm was used to examine reflectance images of experimentally contaminated apples. Fresh feces from dairy cows were applied simultaneously as a thick patch and as a thin, transparent (not

  5. Imaging lidars for space applications

    NASA Astrophysics Data System (ADS)

    Pereira do Carmo, João; Moebius, B.; Pfennigbauer, M.; Bond, R.; Bakalski, I.; Foster, M.; Bellis, S.; Humphries, M.; Fisackerly, R.; Houdou, B.

    2008-08-01

    The European Space Agency (ESA)[1] foresees several robotic missions aimed for the preparation of the future Human Exploration of Mars. To accomplish the mission objectives Imaging LIDARs are one of the identified technologies that shall provide essential information to the spacecraft Guidance, Navigation and Control (GN&C) system. ESA awarded two technology development contracts to two industrial teams for the development and demonstration of novel technologies for Imaging LIDAR sensors. Both teams designed and are manufacturing an Imaging LIDAR breadboard targeting one specific application. The objective of using novel technologies is to reduce substantially the mass and power consumption of Imaging LIDAR sensors. The Imaging LIDAR sensors shall have a mass <10kg, power consumption <60Watt, measure distances up to 5000m, with a field of view (FOV) of 20x20 degrees, range resolutions down to 2 cm, and a frame rate higher than 1 Hz.

  6. Denoising by Averaging Reconstructed Images: Application to Magnetic Resonance Images

    Microsoft Academic Search

    Jianhua Luo; Yuemin Zhu; Isabelle E. Magnin

    2009-01-01

    A novel denoising approach is proposed that is based on averaging reconstructed images. The approach first divides the spectrum of the image to be denoised into different parts. From every such partial spectrum is then reconstructed an image using a 2-D singularity function analysis model. By expressing each of the reconstructed images as the sum of the same noise-free image

  7. How to formulate image processing applications ?

    E-print Network

    Paris-Sud XI, Université de

    How to formulate image processing applications ? Arnaud Renouf, R´egis Clouard, and Marinette In the last fifty years, a lot of image processing applications have been developed in many fields (medicine in image processing terms has been little studied. Image processing specialists develop their applications

  8. A pornographic image filtering model based on erotic part

    Microsoft Academic Search

    Xuanjing Shen; Wei Wei; Qingji Qian

    2010-01-01

    Compared with some deficiencies of the traditional filtering models using the features of skin color only, this paper presents a pornographic image filtering model based on erotic parts detection. And the information of face, skin color and trunk contour is utilized to implement the erotic part recognition. A decision tree classifier is also employed to identify porno image based on

  9. Image Resolution Enhancement and its applications to Medical Image Processing

    E-print Network

    Soatto, Stefano

    Image Resolution Enhancement and its applications to Medical Image Processing Shantanu H. Joshi1, University of California, Los Angeles, CA 90095, USA Abstract. This paper focuses on a new image resolution of image resolution enhancement concerns with the improvement of image resolution based on the fusion

  10. Method of Poisson's ratio imaging within a material part

    NASA Technical Reports Server (NTRS)

    Roth, Don J. (Inventor)

    1996-01-01

    The present invention is directed to a method of displaying the Poisson's ratio image of a material part. In the present invention longitudinal data is produced using a longitudinal wave transducer and shear wave data is produced using a shear wave transducer. The respective data is then used to calculate the Poisson's ratio for the entire material part. The Poisson's ratio approximations are then used to displayed the image.

  11. Image 100 procedures manual development: Applications system library definition and Image 100 software definition

    NASA Technical Reports Server (NTRS)

    Guseman, L. F., Jr.; Decell, H. P., Jr.

    1975-01-01

    An outline for an Image 100 procedures manual for Earth Resources Program image analysis was developed which sets forth guidelines that provide a basis for the preparation and updating of an Image 100 Procedures Manual. The scope of the outline was limited to definition of general features of a procedures manual together with special features of an interactive system. Computer programs were identified which should be implemented as part of an applications oriented library for the system.

  12. Hepatic perfusion imaging: concepts and application.

    PubMed

    Haider, Masoom A; Farhadi, Farzin A; Milot, Laurent

    2010-08-01

    Hepatic perfusion imaging with magnetic resonance (MR) imaging is an emerging technique for quantitative assessment of diffuse hepatic disease and hepatic lesion blood flow. The principal method that has been used is based on T1 dynamic contrast-enhanced MR imaging. Perfusion imaging shows promise in the assessment of tumor therapy response, staging of liver fibrosis, and evaluation of hepatocellular carcinoma. The future standardization of imaging protocols and MR imaging pulse sequences will allow for broader clinical applications. PMID:21094450

  13. 43 CFR 428.2 - Applicability of this part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Applicability of this part. 428.2 Section 428.2 Public Lands: Interior Regulations Relating...AND THE ELIGIBILITY OF CERTAIN FORMERLY EXCESS LAND § 428.2 Applicability of this part. (a) This...

  14. Solid state radiographic image amplifiers, part C

    NASA Technical Reports Server (NTRS)

    Szepesi, Z.

    1971-01-01

    The contrast sensitivity of the radiographic amplifiers, both the storage type and nonstorage type, their absolute sensitivity, and the reproducibility of fabrication were investigated. The required 2-2T quality level was reached with the radiographic storage screen. The sensitivity threshold was 100 to 200 mR with 45 to 100 kV filtered X-rays. The quality level of the radiographic amplifier screen (without storage) was 4-4T; for a 6 mm (0.25 in.) thick aluminum specimen, a 1 mm (0.040 in.) diameter hole in a 0.25 mm (0.010 in.) thick penetrameter was detected. Its sensitivity threshold was 2 to 6 mR/min. The developed radiographic screens are applicable for uses in nondestructive testing.

  15. Application of Wavelet Threshold to Image Denoising

    Microsoft Academic Search

    Qingwu Li; Chunyuan He

    2006-01-01

    Wavelet based techniques have been used for a number of years to de-noise images. By means of the wavelet packet analysis, the low frequency part and high frequency part of the super stratum can be concurrently further broken down, and therefore, more exact analysis of localities can be conducted. By thresholding the wavelet packet transform coefficients of the noisy image,

  16. Real Time Fast Ultrasound Imaging Technology and Possible Applications

    NASA Astrophysics Data System (ADS)

    Cruza, J. F.; Perez, M.; Moreno, J. M.; Fritsch, C.

    In this work, a novel hardware architecture for fast ultrasound imaging based on FPGA devices is proposed. A key difference over other approaches is the unlimited scalability in terms of active channels without performance losses. Acquisition and processing tasks share the same hardware, eliminating communication bottlenecks with smaller size and power losses. These features make this system suitable to implement the most demanding imaging applications, like 3D Phased Array, Total Focusing Method, Vector Doppler, Image Compounding, High Speed Part Scanning and advanced elastographic techniques. A single medium sized FPGA allows beamforming up to 200 scan lines simultaneously, which is enough to perform most of the above mentioned applications in strict real time.

  17. Fundamental performance differences between CMOS and CCD imagers, part IV

    NASA Astrophysics Data System (ADS)

    Janesick, James; Pinter, Jeff; Potter, Robert; Elliott, Tom; Andrews, James; Tower, John; Grygon, Mark; Keller, Dave

    2010-07-01

    This paper is a continuation of past papers written on fundamental performance differences of scientific CMOS and CCD imagers. New characterization results presented below include: 1). a new 1536 × 1536 × 8?m 5TPPD pixel CMOS imager, 2). buried channel MOSFETs for random telegraph noise (RTN) and threshold reduction, 3) sub-electron noise pixels, 4) 'MIM pixel' for pixel sensitivity (V/e-) control, 5) '5TPPD RING pixel' for large pixel, high-speed charge transfer applications, 6) pixel-to-pixel blooming control, 7) buried channel photo gate pixels and CMOSCCDs, 8) substrate bias for deep depletion CMOS imagers, 9) CMOS dark spikes and dark current issues and 10) high energy radiation damage test data. Discussions are also given to a 1024 × 1024 × 16 um 5TPPD pixel imager currently in fabrication and new stitched CMOS imagers that are in the design phase including 4k × 4k × 10 ?m and 10k × 10k × 10 um imager formats.

  18. A Method of Poisson's Ration Imaging Within a Material Part

    NASA Technical Reports Server (NTRS)

    Roth, Don J. (Inventor)

    1994-01-01

    The present invention is directed to a method of displaying the Poisson's ratio image of a material part. In the present invention, longitudinal data is produced using a longitudinal wave transducer and shear wave data is produced using a shear wave transducer. The respective data is then used to calculate the Poisson's ratio for the entire material part. The Poisson's ratio approximations are then used to display the data.

  19. Periodic discrete-time frames: Design and applications for image restoration

    E-print Network

    Averbuch, Amir

    characteristic features of objects or classes of objects. Medical imaging such as CT, FET, X-Ray and MRIPeriodic discrete-time frames: Design and applications for image restoration Amir Averbuch1 Pekka, affected by random noise and parts of pixels are missing. The images were restored by the application

  20. GSTARS computer models and their applications, Part II: Applications

    USGS Publications Warehouse

    Simoes, F.J.M.; Yang, C.T.

    2008-01-01

    In part 1 of this two-paper series, a brief summary of the basic concepts and theories used in developing the Generalized Stream Tube model for Alluvial River Simulation (GSTARS) computer models was presented. Part 2 provides examples that illustrate some of the capabilities of the GSTARS models and how they can be applied to solve a wide range of river and reservoir sedimentation problems. Laboratory and field case studies are used and the examples show representative applications of the earlier and of the more recent versions of GSTARS. Some of the more recent capabilities implemented in GSTARS3, one of the latest versions of the series, are also discussed here with more detail. ?? 2008 International Research and Training Centre on Erosion and Sedimentation and the World Association for Sedimentation and Erosion Research.

  1. An extensible imaging platform for optical imaging applications

    NASA Astrophysics Data System (ADS)

    Paladini, Gianluca; Azar, Fred S.

    2009-02-01

    The National Institutes of Health (NIH) has recently developed an extensible imaging platform (XIP), a new open-source software development platform. XIP can be used to rapidly develop imaging applications designed to meet the needs of the optical imaging community. XIP is a state-of-the-art set of visual 'drag and drop' programming tools and associated libraries for rapid prototyping and application development. The tools include modules tailored for medical imaging, many of which are GPU hardware accelerated. They also provide a friendlier environment for utilizing popular toolkits such as ITK and VTK, and enable the visualization and processing of optical imaging data and standard DICOM data. XIP has built-in functionality for multidimensional data visualization and processing, and enables the development of independently optimized and re-usable software modules, which can be seamlessly added and interconnected to build advanced applications. XIP applications can run "stand alone", including in client/server mode for remote access. XIP also supports the DICOM WG23 "Application Hosting" standard, which will enable plug-in XIP applications to run on any DICOM host workstation. Such interoperability will enable the optical imaging community to develop and deploy modular applications across all academic/clinical/industry partners with WG23 compliant imaging workstations.

  2. This image, looking due south shows the central part of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    This image, looking due south shows the central part of the north wing of the building, a 2 story facade. In the foreground are several utility chases which span this elevation of the building - Department of Energy, Mound Facility, Electronics Laboratory Building (E Building), One Mound Road, Miamisburg, Montgomery County, OH

  3. Medical imaging fusion applications: An overview

    Microsoft Academic Search

    S. P. Constantinos; Marios S. Pattichis; Evangelia Micheli-Tzanakou

    2001-01-01

    Computer aided fusion of multi-modality medical images provides a very promising diagnostic tool with numerous clinical applications. The objective of this paper is to present an overview of medical imaging fusion techniques with an emphasis on the use of neural network algorithms. Case studies derived from oncology (data level fusion), microscopy and ultrasound imaging (feature level and decision level fusion),

  4. Matching stereoscopic SAR images for radargrammetric applications

    E-print Network

    Paris-Sud XI, Université de

    Matching stereoscopic SAR images for radargrammetric applications Franck Fayard, Stéphane Méric allow DEM (Digital Elevation Model) generation from SAR images and we take a special interest images I. INTRODUCTION The research activities of the S.A.P.H.I.R (SAR Polarimetry, Holography

  5. Advanced Imaging Applications to Cardiac Resynchronization Therapy

    E-print Network

    Zanibbi, Richard

    D ultrasound, and electron paramagnetic imaging. His research includes the development of novelAdvanced Imaging Applications to Cardiac Resynchronization Therapy Justin D. Pearlman Professor of the Center for Imaging Science For Cardiac Resynchronization Therapy the goal is to identify where cardiac

  6. Spectral Image Utility for Target Detection Applications

    E-print Network

    Salvaggio, Carl

    Spectral Image Utility for Target Detection Applications by Marcus S. Stefanou B. S. United States Center for Imaging Science, College of Science Rochester Institute of Technology 2008 Signature of AuthorPDF evaluation edition www.CutePDF.com #12;CHESTER F. CARLSON CENTER FOR IMAGING SCIENCE ROCHESTER INSTITUTE

  7. Scattered radiation emission imaging: Principles and applications

    E-print Network

    Boyer, Edmond

    reconstruction of the of the inner object structure relies on the existence of the inverse of the so-called X-rayScattered radiation emission imaging: Principles and applications M. K. Nguyen, T. T. Truong, M of the viability of this imaging principle and its potential applications in various fields. 1. Introduction Since

  8. Digital image processing: a primer for JVIR authors and readers: part 2: digital image acquisition.

    PubMed

    LaBerge, Jeanne M; Andriole, Katherine P

    2003-11-01

    This is the second installment of a three-part series on digital image processing intended to prepare authors for online submission of manuscripts. In the first article of the series, we reviewed the fundamentals of digital image architecture. In this article, we describe the ways that an author can import digital images to the computer desktop. We explore the modern imaging network and explain how to import picture archiving and communications systems (PACS) images to the desktop. Options and techniques for producing digital hard copy film are also presented. PMID:14605101

  9. 19 CFR 208.1 - Applicability of part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...TRADE COMMISSION NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS WITH RESPECT TO COMMERCIAL AVAILABILITY OF TEXTILE FABRIC AND YARN IN SUB-SAHARAN AFRICAN COUNTRIES § 208.1 Applicability of part. This part 208 applies to proceedings of the...

  10. 19 CFR 208.1 - Applicability of part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...TRADE COMMISSION NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS WITH RESPECT TO COMMERCIAL AVAILABILITY OF TEXTILE FABRIC AND YARN IN SUB-SAHARAN AFRICAN COUNTRIES § 208.1 Applicability of part. This part 208 applies to proceedings of the...

  11. 19 CFR 207.1 - Applicability of part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS OF WHETHER INJURY TO DOMESTIC INDUSTRIES RESULTS FROM IMPORTS SOLD AT LESS THAN FAIR VALUE OR FROM SUBSIDIZED EXPORTS TO THE UNITED STATES § 207.1 Applicability of part. Part 207 applies to...

  12. 47 CFR 90.5 - Other applicable rule parts.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...applications for stations to operate in the Wireless Telecommunications Services, adjudicatory...contains rules relating to miscellaneous wireless communications services. (l) Part...equipment to the public switched telephone network. (n) Part 101 governs the...

  13. 43 CFR 17.2 - Application of this part.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.2 Application of this part. (a) This part applies to any program...

  14. 43 CFR 17.2 - Application of this part.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.2 Application of this part. (a) This part applies to any program...

  15. 43 CFR 17.2 - Application of this part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.2 Application of this part. (a) This part applies to any program...

  16. 43 CFR 17.2 - Application of this part.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.2 Application of this part. (a) This part applies to any program...

  17. 43 CFR 17.2 - Application of this part.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...Interior NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.2 Application of this part. (a) This part applies to any program...

  18. 49 CFR 1542.1 - Applicability of this part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY General § 1542.1 Applicability...This part describes aviation security rules governing...The operation of airports regularly serving...under a security program under part...

  19. 49 CFR 1542.1 - Applicability of this part.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY General § 1542.1 Applicability...This part describes aviation security rules governing...The operation of airports regularly serving...under a security program under part...

  20. 49 CFR 1542.1 - Applicability of this part.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY General § 1542.1 Applicability...This part describes aviation security rules governing...The operation of airports regularly serving...under a security program under part...

  1. 49 CFR 1542.1 - Applicability of this part.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY General § 1542.1 Applicability...This part describes aviation security rules governing...The operation of airports regularly serving...under a security program under part...

  2. 49 CFR 1542.1 - Applicability of this part.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...SECURITY CIVIL AVIATION SECURITY AIRPORT SECURITY General § 1542.1 Applicability...This part describes aviation security rules governing...The operation of airports regularly serving...under a security program under part...

  3. Brain Imaging: Applications in Psychiatry.

    ERIC Educational Resources Information Center

    Andreasen, Nancy C.

    1988-01-01

    Discusses various brain imaging techniques, including computed tomography, magnetic resonance imaging, measurement of regional cerebral blood flow, single photo emission tomography, and position emission tomography. Describes the uses of these techniques in helping to understand brain functioning. (TW)

  4. Scope and applications of translation invariant wavelets to image registration

    NASA Technical Reports Server (NTRS)

    Chettri, Samir; LeMoigne, Jacqueline; Campbell, William

    1997-01-01

    The first part of this article introduces the notion of translation invariance in wavelets and discusses several wavelets that have this property. The second part discusses the possible applications of such wavelets to image registration. In the case of registration of affinely transformed images, we would conclude that the notion of translation invariance is not really necessary. What is needed is affine invariance and one way to do this is via the method of moment invariants. Wavelets or, in general, pyramid processing can then be combined with the method of moment invariants to reduce the computational load.

  5. Lens-Free Imaging for Biological Applications

    PubMed Central

    Kim, Sang Bok; Bae, Hojae; Koo, Kyo-in; Dokmeci, Mehmet R.; Ozcan, Aydogan; Khademhosseini, Ali

    2013-01-01

    Lens-free (or lensless) imaging is emerging as a cost-effective, compact, and lightweight detection method that can serve numerous biological applications. Lens-free imaging can generate high-resolution images within a field-portable platform, which is ideal for affordable point-of-care devices aiming at resource-limited settings. In this mini-review, we first describe different modes of operation for lens-free imaging and then highlight several recent biological applications of this emerging platform technology. PMID:22357607

  6. Parts, Image, and Sketch based 3D Modeling Method

    Microsoft Academic Search

    Thomas Stahovich; Mario Costa Sousa; Jun Murakawa; Ilmi Yoon; Tracie Hong; Edward Lank

    2006-01-01

    Despite their many benefits, challenges exist in the creation of 3D models, particularly for individual not currently skilled with 3D modeling software. To address this, w e explore the creation of 3D modeling software for non-domain experts that uses a hierarchical parts database of generic 3D models, and deforms models into specific related target objects using image guided 3D model

  7. Radial flow permeability measurement. Part B: Application

    Microsoft Academic Search

    J. R Weitzenböck; R. A Shenoi; P. A Wilson

    1999-01-01

    This paper deals with permeability measurement in the context of Resin Transfer Moulding (RTM). A new approach to two-dimensional radial flow permeability measurement with constant inlet pressure is proposed in part A of this paper. In this second part experimental studies are performed to validate the new approach. The new approach is shown to accurately predict the orientation of the

  8. TRAINING PERIOD 2013 Image processing for space applications

    E-print Network

    Dobigeon, Nicolas

    TRAINING PERIOD 2013 Image processing for space applications Image Processing: Operational Processor Adaptation. Field: Development and Studies Speciality: Image processing Subject Image production subsystems require light and fast image processing modules. Astrium Satellites has developed a family

  9. Image registration for luminescent paint applications

    NASA Technical Reports Server (NTRS)

    Bell, James H.; Mclachlan, Blair G.

    1993-01-01

    The use of pressure sensitive luminescent paints is a viable technique for the measurement of surface pressure on wind tunnel models. This technique requires data reduction of images obtained under known as well as test conditions and spatial transformation of the images. A general transform which registers images to subpixel accuracy is presented and the general characteristics of transforms for image registration and their derivation are discussed. Image resection and its applications are described. The mapping of pressure data to the three dimensional model surface for small wind tunnel models to a spatial accuracy of 0.5 percent of the model length is demonstrated.

  10. Diagnostic imaging of the equine tarsal region using radiography and ultrasonography. Part 1: the soft tissues.

    PubMed

    Vanderperren, Katrien; Raes, Els; Hoegaerts, Michel; Saunders, Jimmy H

    2009-02-01

    The equine tarsus is the most commonly affected hindlimb region associated with lameness. Diagnostic imaging is routinely applied but because of its complexity, being composed of 10 multifaceted bones and different joints, multiple ligaments, tendons and bursae, imaging this region can be a challenge. This is the first part of a two-part review of the structures and disorders of the equine tarsus. It describes the principal disorders affecting the soft tissues of the tarsal region and addresses some of the technical aspects in taking radiographic, ultrasonographic and scintigraphic images of the different soft tissue lesions. Where applicable, comments on the diagnostic use of contrast radiography, arthroscopy and tenoscopy are made. In current clinical practice a combination of radiography and ultrasonography is still most frequently used to arrive at a diagnosis. PMID:17936046

  11. ALSEP Array E, PSK Transmitter Parts Application Analysis

    E-print Network

    Rathbun, Julie A.

    I ALSEP Array E, PSK Transmitter Parts Application Analysis NO. PAGE i ~REV. NO. A OF 7 I 'DATE 12's PSK transmitter. The analysis reflects the operating stress levels and the failure rates obtained from 3. 0 4.0 5.0 Appendix A I I ALSEP Array E, PSK Transmitter Parts Application Analysis Table

  12. Lanthanide Complexes for Luminescence Imaging Applications

    Microsoft Academic Search

    Stephen Faulkner; Simon J. A. Pope

    2005-01-01

    In this article, imaging applications of luminescent complexes and recent advances in the design and photophysical behaviour of near?IR responsive complexes are reviewed. Various properties of the luminescent lanthanide complexes are also discussed in detail.

  13. Advances in scintillators for medical imaging applications

    NASA Astrophysics Data System (ADS)

    van Loef, Edgar V.; Shah, Kanai S.

    2014-09-01

    A review is presented of some recent work in the field of inorganic scintillator research for medical imaging applications, in particular scintillation detectors for Single-Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET).

  14. Petrophysical applications of NMR imaging

    SciTech Connect

    Rothwell, W.P.; Vinegar, H.J.

    1985-12-01

    A system for obtaining high-resolution NMR images of oil field cores is described. Separate proton density and T/sub 2/ relaxation images are obtained to distinguish spatial variations of fluid-filled porosity and the physical nature of the pores. Results are presented for typical sandstones.

  15. Small pixel uncooled imaging FPAs and applications

    NASA Astrophysics Data System (ADS)

    Blackwell, Richard; Franks, Glen; Lacroix, Daniel; Hyland, Sandra; Murphy, Robert

    2010-04-01

    BAE Systems continues to make dramatic progress in uncooled microbolometer sensors and applications. This paper will review the latest advancements in microbolometer technology at BAE Systems, including the development status of 17 micrometer pixel pitch detectors and imaging modules which are entering production and will be finding their way into BAE Systems products and applications. Benefits include increased die per wafer and potential benefits to SWAP for many applications. Applications include thermal weapons sights, thermal imaging modules for remote weapon stations, vehicle situational awareness sensors and mast/pole mounted sensors.

  16. Molecular Body Imaging: MR Imaging, CT, and US. Part I. Principles

    PubMed Central

    Kircher, Moritz F.

    2012-01-01

    Molecular imaging, generally defined as noninvasive imaging of cellular and subcellular events, has gained tremendous depth and breadth as a research and clinical discipline in recent years. The coalescence of major advances in engineering, molecular biology, chemistry, immunology, and genetics has fueled multi- and interdisciplinary innovations with the goal of driving clinical noninvasive imaging strategies that will ultimately allow disease identification, risk stratification, and monitoring of therapy effects with unparalleled sensitivity and specificity. Techniques that allow imaging of molecular and cellular events facilitate and go hand in hand with the development of molecular therapies, offering promise for successfully combining imaging with therapy. While traditionally nuclear medicine imaging techniques, in particular positron emission tomography (PET), PET combined with computed tomography (CT), and single photon emission computed tomography, have been the molecular imaging methods most familiar to clinicians, great advances have recently been made in developing imaging techniques that utilize magnetic resonance (MR), optical, CT, and ultrasonographic (US) imaging. In the first part of this review series, we present an overview of the principles of MR imaging-, CT-, and US-based molecular imaging strategies. © RSNA, 2012 PMID:22623690

  17. Optimal Distribution System Horizon Planning–Part II: Application

    Microsoft Academic Search

    Robert H. Fletcher; Kai Strunz

    2007-01-01

    This is the second part of a two-part paper in which application methods to enhance distribution horizon planning for a 20+ year period are described. The optimal horizon planning model encompasses all distribution design requirements for primary and secondary systems. The model formulation is described in the companion paper Part I. The model makes use of a generalized feeder layout

  18. 40 CFR 51.1001 - Applicability of part 51.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...part 51. 51.1001 Section 51.1001 Protection of Environment...Ambient Air Quality Standards § 51.1001 Applicability of part 51. The provisions in subparts A through X of this part apply to areas for purposes of the PM2.5...

  19. 40 CFR 51.1001 - Applicability of part 51.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...part 51. 51.1001 Section 51.1001 Protection of Environment...Ambient Air Quality Standards § 51.1001 Applicability of part 51. The provisions in subparts A through X of this part apply to areas for purposes of the PM2.5...

  20. 40 CFR 51.1001 - Applicability of part 51.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...part 51. 51.1001 Section 51.1001 Protection of Environment...Ambient Air Quality Standards § 51.1001 Applicability of part 51. The provisions in subparts A through X of this part apply to areas for purposes of the PM2.5...

  1. 40 CFR 51.1001 - Applicability of part 51.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...part 51. 51.1001 Section 51.1001 Protection of Environment...Ambient Air Quality Standards § 51.1001 Applicability of part 51. The provisions in subparts A through X of this part apply to areas for purposes of the PM2.5...

  2. 40 CFR 51.1001 - Applicability of part 51.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...part 51. 51.1001 Section 51.1001 Protection of Environment...Ambient Air Quality Standards § 51.1001 Applicability of part 51. The provisions in subparts A through X of this part apply to areas for purposes of the PM2.5...

  3. Imaging radar applications to mapping and charting

    NASA Technical Reports Server (NTRS)

    Leberl, F.

    1976-01-01

    The paper outlines the major actual and potential radar mapping applications, gives an account of the present state of satellite radar imaging, and reviews the radargrammetric work achieved since 1972. Attention is focused on the mapping methods and accuracy regarding single-image radar mapping, stereo radargrammetry, and mapping from blocks of overlapping imagery. It is recommended that more radargrammetric expertise be applied in radar mapping projects so that full advantage may be taken of the metric information potential of imaging radar.

  4. Image mosaicing for tele-reality applications

    Microsoft Academic Search

    Richard Szeliski

    1994-01-01

    This paper presents some techniques for automatically deriving realistic 2-D scenes and 3-D geometric models from video sequences. These techniques can be used to build environments and 3-D models for virtual reality application based on recreating a true scene, i.e., tele-reality applications. The fundamental technique used in this paper is image mosaicing, i.e., the automatic alignment of multiple images into

  5. Multisensor Image Fusion: Concept, Method and Applications

    Microsoft Academic Search

    Yaonan Wang

    Multisensor image fusion is a process of combining or amalgamating information from multiple sensors. It has been applied to a wide variety of fields such as navigation, military surveillance, remote sensing, medical diagnosis, industrial process control and measurement, intelligent robot, and law enforcement. In this paper, the basic concept, advantage, general structure, methods, applications, and performance evaluation of multisensor image

  6. Image Fusion: Principles, Methods, and Applications

    E-print Network

    Sroubek, Filip

    In this tutorial we categorize the IF methods according to the data entering the fusion and according to the fusionImage Fusion: Principles, Methods, and Applications Tutorial EUSIPCO 2007 Lecture Notes Jan Flusser in several domains. The goal of image fusion (IF) is to integrate complementary multisensor, multitemporal

  7. Prior image constrained image reconstruction in emerging computed tomography applications

    NASA Astrophysics Data System (ADS)

    Brunner, Stephen T.

    Advances have been made in computed tomography (CT), especially in the past five years, by incorporating prior images into the image reconstruction process. In this dissertation, we investigate prior image constrained image reconstruction in three emerging CT applications: dual-energy CT, multi-energy photon-counting CT, and cone-beam CT in image-guided radiation therapy. First, we investigate the application of Prior Image Constrained Compressed Sensing (PICCS) in dual-energy CT, which has been called "one of the hottest research areas in CT." Phantom and animal studies are conducted using a state-of-the-art 64-slice GE Discovery 750 HD CT scanner to investigate the extent to which PICCS can enable radiation dose reduction in material density and virtual monochromatic imaging. Second, we extend the application of PICCS from dual-energy CT to multi-energy photon-counting CT, which has been called "one of the 12 topics in CT to be critical in the next decade." Numerical simulations are conducted to generate multiple energy bin images for a photon-counting CT acquisition and to investigate the extent to which PICCS can enable radiation dose efficiency improvement. Third, we investigate the performance of a newly proposed prior image constrained scatter correction technique to correct scatter-induced shading artifacts in cone-beam CT, which, when used in image-guided radiation therapy procedures, can assist in patient localization, and potentially, dose verification and adaptive radiation therapy. Phantom studies are conducted using a Varian 2100 EX system with an on-board imager to investigate the extent to which the prior image constrained scatter correction technique can mitigate scatter-induced shading artifacts in cone-beam CT. Results show that these prior image constrained image reconstruction techniques can reduce radiation dose in dual-energy CT by 50% in phantom and animal studies in material density and virtual monochromatic imaging, can lead to radiation dose efficiency improvement in multi-energy photon-counting CT, and can mitigate scatter-induced shading artifacts in cone-beam CT in full-fan and half-fan modes.

  8. Clinical applications in molecular imaging

    Microsoft Academic Search

    Carola Heneweer; Jan Grimm

    2011-01-01

    Molecular imaging is aimed at the noninvasive in vivo characterization and measurement of processes at a cellular and molecular\\u000a level with clinical imaging methods. Contrast agents are constructed to target markers that are specific either for certain\\u000a diseases or for functional states of specialized tissues. Efforts are currently focused mainly on processes involved in angiogenesis,\\u000a inflammation, and apoptosis. Cell tracking

  9. Clinical applications of choroidal imaging technologies

    PubMed Central

    Chhablani, Jay; Barteselli, Giulio

    2015-01-01

    Choroid supplies the major blood supply to the eye, especially the outer retinal structures. Its understanding has significantly improved with the advent of advanced imaging modalities such as enhanced depth imaging technique and the newer swept source optical coherence tomography. Recent literature reports the findings of choroidal changes, quantitative as well as qualitative, in various chorioretinal disorders. This review article describes applications of choroidal imaging in the management of common diseases such as age-related macular degeneration, high myopia, central serous chorioretinopathy, chorioretinal inflammatory diseases, and tumors. This article briefly discusses future directions in choroidal imaging including angiography. PMID:26139797

  10. Partly occupied Wannier functions: Construction and applications

    Microsoft Academic Search

    K. S. Thygesen; L. B. Hansen; K. W. Jacobsen

    2005-01-01

    We have developed a practical scheme to construct partly occupied, maximally\\u000alocalized Wannier functions (WFs) for a wide range of systems. We explain and\\u000ademonstrate how the inclusion of selected unoccupied states in the definition\\u000aof the WFs can improve both their localization and symmetry properties. A\\u000asystematic selection of the relevant unoccupied states is achieved by\\u000aminimizing the spread

  11. Applications of Nanobiotechnology in Ophthalmology – Part I

    Microsoft Academic Search

    Pho Nguyen; M. Meyyappan; Samuel C. Yiu

    2010-01-01

    Much progress has been achieved in the field of nanotechnology and its applications in ophthalmology. It is evident that drug delivery, gene therapy, implantable devices and regenerative medicine are some of the key areas of active research. To the best of our knowledge, there is limited review work on this subject area in the current literature. To assist the interested

  12. Fourier Transform Infrared Spectroscopy Part III. Applications.

    ERIC Educational Resources Information Center

    Perkins, W. D.

    1987-01-01

    Discusses the use of the FT-IR spectrometer in analyses that were previously avoided. Examines some of the applications of this spectroscopy with aqueous solutions, circular internal reflection, samples with low transmission, diffuse reflectance, infrared emission, and the infrared microscope. (TW)

  13. Medical Applications of Microwave Imaging

    PubMed Central

    Wang, Zhao; Lim, Eng Gee; Tang, Yujun

    2014-01-01

    Ultrawide band (UWB) microwave imaging is a promising method for the detection of early stage breast cancer, based on the large contrast in electrical parameters between malignant tumour tissue and the surrounding normal breast-tissue. In this paper, the detection and imaging of a malignant tumour are performed through a tomographic based microwave system and signal processing. Simulations of the proposed system are performed and postimage processing is presented. Signal processing involves the extraction of tumour information from background information and then image reconstruction through the confocal method delay-and-sum algorithms. Ultimately, the revision of time-delay and the superposition of more tumour signals are applied to improve accuracy. PMID:25379515

  14. Multiresolution Applications in Computer Graphics: Curves, Images, and Video

    E-print Network

    Washington at Seattle, University of

    Multiresolution Applications in Computer Graphics: Curves, Images, and Video by Adam Finkelstein;#12;University of Washington Abstract Multiresolution Applications in Computer Graphics: Curves, Images for multiresolution curves, multiresolution images, and multiresolution video, and it demonstrates several

  15. Application of external tracking in ultrasound elasticity imaging

    NASA Astrophysics Data System (ADS)

    Foroughi, Pezhman; Hager, Gregory D.; Wacker, Frank K.; Boctor, Emad M.

    2010-03-01

    Despite the success of ultrasound elasticity imaging (USEI) in medical applications such as diagnosis and screening of breast lesions and prostate cancer, USEI has not been adopted in routine clinical procedures. This is partly caused by the difficulty in acquiring reliable images and interpreting them, the lack of consistency over time, and the dependency of image quality to the expertise of the user. We previously demonstrated the potential of exploiting an external tracker to partially alleviate these issues and enhance the quality of USEI. The tracking data enabled fast and automatic selection of pairs of RF frames used in strain calculation. Here, we expand this method by including new features. The proposed method employs image content to compensate for the limited accuracy of the tracking device. It also combines multiple strain images to improve the quality of the final image. For this purpose, It normalizes the images and determines which images can be combined relying on the tracking information. We have acquired RF frames synchronized with tracking data from livers of pig containing an ablated region and a breast phantom using two different tracking devices; an optical tracker and a less accurate electromagnetic tracker. We present the promising results of the proposed method and investigate the sensitivity of frame selection technique without using the image content to inaccuracies in tracking information.

  16. 19 CFR 208.2 - Definitions applicable to this part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...TRADE COMMISSION NONADJUDICATIVE INVESTIGATIONS INVESTIGATIONS WITH RESPECT TO COMMERCIAL AVAILABILITY OF TEXTILE FABRIC AND YARN IN SUB-SAHARAN AFRICAN COUNTRIES § 208.2 Definitions applicable to this part. (a) Beneficiary sub-Saharan...

  17. Imaging spectrometry - Technology and applications

    Microsoft Academic Search

    Jerry E. Solomon

    1989-01-01

    The development history and current status of NASA imaging-spectrometer (IS) technology are discussed in a review covering the period 1982-1988. Consideration is given to the Airborne IS first flown in 1982, the second-generation Airborne Visible and IR IS (AVIRIS), the High-Resolution IS being developed for the EOS polar platform, improved two-dimensional focal-plane arrays for the short-wave IR spectral region, and

  18. Applications of nuclear medicine in genitourinary imaging

    SciTech Connect

    Blaufox, M.D.; Kalika, V.; Scharf, S.; Milstein, D.

    1982-01-01

    Major advances in nuclear medicine instrumentation and radiopharmaceuticals for renal studies have occurred during the last decade. Current nuclear medicine methodology can be applied for accurate evaluation of renal function and for renal imaging in a wide variety of clinical situations. Total renal function can be estimated from the plasma clearance of agents excreted by glomerular filtration or tubular secretion, and individual function can be estimated by imaging combined with renography. A major area of radionuclide application is in the evaluation of obstructive uropathy. The introduction of diuretic renography and the use of computer-generated regions of interest offer the clinician added useful data which may aid in diagnosis and management. Imaging is of proven value also in trauma, renovascular hypertension, and acute and chronic renal failure. Methods for the evaluation of residual urine, vesicoureteral reflux, and testicular torsion have achieved increasing clinical use. These many procedures assure a meaningful and useful role for the application of nuclear medicine in genitourinary imaging.

  19. 40 CFR 51.901 - Applicability of part 51.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Implementation of 8-hour Ozone National Ambient Air Quality Standard § 51.901 Applicability of part 51. The provisions in subparts A through W of part 51 apply to areas for purposes of the 8-hour NAAQS to the extent they are not...

  20. 40 CFR 51.901 - Applicability of part 51.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Implementation of 8-hour Ozone National Ambient Air Quality Standard § 51.901 Applicability of part 51. The provisions in subparts A through W of part 51 apply to areas for purposes of the 8-hour NAAQS to the extent they are not...

  1. 40 CFR 51.901 - Applicability of part 51.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Implementation of 8-hour Ozone National Ambient Air Quality Standard § 51.901 Applicability of part 51. The provisions in subparts A through W of part 51 apply to areas for purposes of the 8-hour NAAQS to the extent they are not...

  2. 40 CFR 51.901 - Applicability of part 51.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Implementation of 8-hour Ozone National Ambient Air Quality Standard § 51.901 Applicability of part 51. The provisions in subparts A through W of part 51 apply to areas for purposes of the 8-hour NAAQS to the extent they are not...

  3. 40 CFR 51.901 - Applicability of part 51.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Implementation of 8-hour Ozone National Ambient Air Quality Standard § 51.901 Applicability of part 51. The provisions in subparts A through W of part 51 apply to areas for purposes of the 8-hour NAAQS to the extent they are not...

  4. A microwave imaging spectrometer for security applications

    NASA Astrophysics Data System (ADS)

    Jirousek, Matthias; Peichl, Markus; Suess, Helmut

    2010-04-01

    In recent years the security of people and critical infrastructures is of increasing interest. Passive microwave sensors in the range of 1 - 100 GHz are suitable for the detection of concealed objects and wide-area surveillance through poor weather and at day and night time. The enhanced extraction of significant information about an observed object is enabled by the use of a spectral sensitive system. For such a spectral radiometer in the microwave range also some depth information can be extracted. The usable frequency range is thereby dependent on the application. For through-wall imaging or detection of covert objects such as for example landmines, the lower microwave range is best suited. On the other hand a high spatial resolution requires higher frequencies or instruments with larger physical dimensions. The drawback of a large system is the required movement of a mirror or a deflecting plate in the case of a mechanical scanner system, or a huge amount of receivers in a fully-electronic instrument like a focal plane array. An innovative technique to overcome these problems is the application of aperture synthesis using a highly thinned array. The combination of spectral radiometric measurements within a wide frequency band, at a high resolution, and requiring a minimum of receivers and only minor moving parts led to the development of the ANSAS instrument (Abbildendes Niederfrequenz-Spektrometer mit Apertursynthese). ANSAS is a very flexible aperture synthesis technology demonstrator for the analysis of main features and interactions concerning high spatial resolution and spectral sensing within a wide frequency range. It consists of a rotated linear thinned array and thus the spatial frequency spectrum is measured on concentric circles. Hence the number of receivers and correlators is reduced considerably compared to a fully two-dimensional array, and measurements still can be done in a reasonable time. In this paper the basic idea of ANSAS and its setup are briefly introduced. Some first imaging results showing the basic capabilities are illustrated. Possible error sources and their impacts are discussed by simulation and compared to the measured data.

  5. Spaceborne imaging radar: geologic and oceanographic applications.

    PubMed

    Elachi, C

    1980-09-01

    Synoptic, large-area radar images of the earth's land and ocean surface, obtained from the Seasat orbiting spacecraft, show the potential for geologic mapping and for monitoring of ocean surface patterns. Structural and topographic features such as lineaments, anticlines, folds and domes, drainage patterns, stratification, and roughness units can be mapped. Ocean surface waves, internal waves, current boundaries, and large-scale eddies have been observed in numerous images taken by the Seasat imaging radar. This article gives an illustrated overview of these applications. PMID:17841450

  6. Spaceborne imaging radar - Geologic and oceanographic applications

    NASA Technical Reports Server (NTRS)

    Elachi, C.

    1980-01-01

    Synoptic, large-area radar images of the earth's land and ocean surface, obtained from the Seasat orbiting spacecraft, show the potential for geologic mapping and for monitoring of ocean surface patterns. Structural and topographic features such as lineaments, anticlines, folds and domes, drainage patterns, stratification, and roughness units can be mapped. Ocean surface waves, internal waves, current boundaries, and large-scale eddies have been observed in numerous images taken by the Seasat imaging radar. This article gives an illustrated overview of these applications.

  7. An image recognition method for rusty and damaged car parts after road traffic accident

    Microsoft Academic Search

    Kenneth H. L. Ho; Kazuo Yamaba

    1993-01-01

    This paper presents a new image recognition method which can recognise undamaged car parts of a car after a road traffic accident. This image recognition method defines concepts by using a set of images as examples. It recognises a new image by collecting evidence from the images in the example set. A simple example was used to illustrate this method

  8. SPIE Medical Imaging 2006 San Diego Knowledge modeling in image-guided neurosurgery: application in

    E-print Network

    Paris-Sud XI, Université de

    SPIE Medical Imaging 2006 San Diego Knowledge modeling in image-guided neurosurgery: application, Rennes, France ABSTRACT During an image-guided neurosurgery procedure, the neuronavigation system modeling, formalization, data mining 1. INTRODUCTION During an image-guided neurosurgery procedure

  9. Medical Image Science: Applications Medical Physics/Biomedical Engineering 574

    E-print Network

    Walker, Thad G.

    Medical Image Science: Applications Medical Physics/Biomedical Engineering 574 1022 WIMR, 9-0090 Email: sfain@wisc.edu This course presents the application of medical imaging theory to problems in medical imaging science including: concepts of digital image processing, image reconstruction

  10. General Adaptive Neighborhood Image Processing Part I: Introduction and Theoretical Aspects

    E-print Network

    Paris-Sud XI, Université de

    General Adaptive Neighborhood Image Processing Part I: Introduction and Theoretical Aspects JOHAN-called General Adaptive Neighborhood Image Processing (GANIP) approach is presented in a two parts paper dealing the building of new image processing transformations using context-dependent analysis. Such operators

  11. Imaging heart failure: current and future applications.

    PubMed

    Paterson, Ian; Mielniczuk, Lisa M; O'Meara, Eileen; So, Aaron; White, James A

    2013-03-01

    A variety of cardiac imaging tests are used to help manage patients with heart failure (HF). This article reviews current and future HF applications for the major noninvasive imaging modalities: transthoracic echocardiography (TTE), single-photon emission computed tomography (SPECT), positron emission tomography (PET), cardiovascular magnetic resonance (CMR), and computed tomography (CT). TTE is the primary imaging test used in the evaluation of patients with HF, given its widespread availability and reliability in assessing cardiac structure and function. Recent developments in myocardial strain, 3-dimensional TTE, and echo contrast appear to offer superior diagnostic and prognostic information. SPECT imaging is a common method employed to detect ischemia and viability in patients with HF; however, PET offers higher diagnostic accuracy for both. Ongoing study of sympathetic and molecular imaging techniques may enable early disease detection, better risk stratification, and ultimately targeted treatment interventions. CMR provides high-quality information on cardiac structure and function and allows the characterization of myocardial tissue. Myocardial late gadolinium enhancement allows the determination of HF etiology and may predict patient outcomes and treatment response. Cardiac CT has become a reliable means for detecting coronary artery disease, and recent advances have enabled concurrent myocardial function, perfusion, and scar analyses. Overall, available imaging methods provide reliable measures of cardiac performance in HF, and recent advances will allow detection of subclinical disease. More data are needed demonstrating the specific clinical value of imaging methods and particularly subclinical disease detection in large-scale, clinical settings. PMID:23439018

  12. 37 CFR 1.991 - Merger of concurrent reissue application and inter partes reexamination proceeding.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...application and inter partes reexamination proceeding. 1.991 Section 1.991 Patents...After November 29, 1999 Concurrent Proceedings Involving Same Patent in Inter Partes...application and inter partes reexamination proceeding. If a reissue application and...

  13. 37 CFR 1.991 - Merger of concurrent reissue application and inter partes reexamination proceeding.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...application and inter partes reexamination proceeding. 1.991 Section 1.991 Patents...After November 29, 1999 Concurrent Proceedings Involving Same Patent in Inter Partes...application and inter partes reexamination proceeding. If a reissue application and...

  14. 37 CFR 1.991 - Merger of concurrent reissue application and inter partes reexamination proceeding.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...application and inter partes reexamination proceeding. 1.991 Section 1.991 Patents...After November 29, 1999 Concurrent Proceedings Involving Same Patent in Inter Partes...application and inter partes reexamination proceeding. If a reissue application and...

  15. 37 CFR 1.991 - Merger of concurrent reissue application and inter partes reexamination proceeding.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...application and inter partes reexamination proceeding. 1.991 Section 1.991 Patents...After November 29, 1999 Concurrent Proceedings Involving Same Patent in Inter Partes...application and inter partes reexamination proceeding. If a reissue application and...

  16. 37 CFR 1.991 - Merger of concurrent reissue application and inter partes reexamination proceeding.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...application and inter partes reexamination proceeding. 1.991 Section 1.991 Patents...After November 29, 1999 Concurrent Proceedings Involving Same Patent in Inter Partes...application and inter partes reexamination proceeding. If a reissue application and...

  17. Acquisition and applications of 3D images

    NASA Astrophysics Data System (ADS)

    Sterian, Paul; Mocanu, Elena

    2007-08-01

    The moiré fringes method and their analysis up to medical and entertainment applications are discussed in this paper. We describe the procedure of capturing 3D images with an Inspeck Camera that is a real-time 3D shape acquisition system based on structured light techniques. The method is a high-resolution one. After processing the images, using computer, we can use the data for creating laser fashionable objects by engraving them with a Q-switched Nd:YAG. In medical field we mention the plastic surgery and the replacement of X-Ray especially in pediatric use.

  18. Technology and application advancements of uncooled imagers

    NASA Astrophysics Data System (ADS)

    Norton, Peter W.; Kohin, Margaret

    2005-05-01

    Having delivered over 30,000 uncooled microbolometer based thermal imaging engines, BAE Systems is the world's leading producer. Advancements in technology include the demonstration of broadband microbolometers on a 46 ?m pixel pitch which have excellent sensitivity in the MWIR (NETD ~180 mK, 3-5 ?m) and LWIR (NETD ~ 15 mK, 8-12 ?m) wavebands. Application advancements include the development of a family of thermal weapons sights for the military which will replace current cooled systems with lighter, lower power systems and the introduction of a new generation of handheld and pole mounted thermal imagers for commercial markets.

  19. Biometrics Beyond the Visible Spectrum: Imaging Technologies and Applications

    E-print Network

    Autonoma de Madrid, Universidad

    technologies working beyond the visible spectrum (X-ray, Infrared, Millimeter and Submillimeter Wave imaging. Keywords: Imaging Technologies, X-ray, Infrared, Millimeter Waves, Submillimeter Waves, ThermographBiometrics Beyond the Visible Spectrum: Imaging Technologies and Applications Miriam Moreno

  20. Musculoskeletal applications of magnetic resonance imaging: Council on Scientific Affairs

    SciTech Connect

    Harms, S.E.; Fisher, C.F.; Fulmer, J.M. (American Medical Association, Chicago, IL (USA))

    1989-11-03

    Magnetic resonance imaging provides superior contrast, resolution, and multiplanar imaging capability, allowing excellent definition of soft-tissue and bone marrow abnormalities. For these reasons, magnetic resonance imaging has become a major diagnostic imaging method for the evaluation of many musculoskeletal disorders. The applications of magnetic resonance imaging for musculoskeletal diagnosis are summarized and examples of common clinical situations are given. General guidelines are suggested for the musculoskeletal applications of magnetic resonance imaging.

  1. Active gated imaging for automotive safety applications

    NASA Astrophysics Data System (ADS)

    Grauer, Yoav; Sonn, Ezri

    2015-03-01

    The paper presents the Active Gated Imaging System (AGIS), in relation to the automotive field. AGIS is based on a fast gated-camera equipped with a unique Gated-CMOS sensor, and a pulsed Illuminator, synchronized in the time domain to record images of a certain range of interest which are then processed by computer vision real-time algorithms. In recent years we have learned the system parameters which are most beneficial to night-time driving in terms of; field of view, illumination profile, resolution and processing power. AGIS provides also day-time imaging with additional capabilities, which enhances computer vision safety applications. AGIS provides an excellent candidate for camera-based Advanced Driver Assistance Systems (ADAS) and the path for autonomous driving, in the future, based on its outstanding low/high light-level, harsh weather conditions capabilities and 3D potential growth capabilities.

  2. Application of near-infrared image processing in agricultural engineering

    Microsoft Academic Search

    Ming-Hong Chen; Guo-Ping Zhang; Hongxing Xia

    2009-01-01

    Recently, with development of computer technology, the application field of near-infrared image processing becomes much wider. In this paper the technical characteristic and development of modern NIR imaging and NIR spectroscopy analysis were introduced. It is concluded application and studying of the NIR imaging processing technique in the agricultural engineering in recent years, base on the application principle and developing

  3. 17 CFR 285.1 - Applicability of part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...RULES AND REGULATIONS PURSUANT TO SECTION 15(a) OF THE BRETTON WOODS AGREEMENTS ACT § 285.1 Applicability of part. ...Reconstruction and Development pursuant to section 15(a) of the Bretton Woods Agreements Act. [Reg. BW, 15 FR 281, Jan. 17,...

  4. 17 CFR 285.1 - Applicability of part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...RULES AND REGULATIONS PURSUANT TO SECTION 15(a) OF THE BRETTON WOODS AGREEMENTS ACT § 285.1 Applicability of part. ...Reconstruction and Development pursuant to section 15(a) of the Bretton Woods Agreements Act. [Reg. BW, 15 FR 281, Jan. 17,...

  5. 14 CFR 91.801 - Applicability: Relation to part 36.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...GENERAL OPERATING AND FLIGHT RULES Operating Noise Limits § 91.801 Applicability: Relation...a) This subpart prescribes operating noise limits and related requirements that...refers to 14 CFR part 36, including the noise levels under appendix C of that...

  6. Application of Image Processing Technology in Paper Currency Classification System

    Microsoft Academic Search

    Wenhong Li; Yonggang Li; Kexue Luo

    2008-01-01

    The processing effect and recognition accuracy of RMB is an important part in the paper currency classification system. According to the characteristics of RMB images, the paper uses the theory of digital image processing and pattern recognition to put forward the method of RMB image processing based on the processing and recognition of the part of the RMB serial numbers,

  7. Adaptive Optics Retinal Imaging: Emerging Clinical Applications

    PubMed Central

    Godara, Pooja; Dubis, Adam M.; Roorda, Austin; Duncan, Jacque L.; Carroll, Joseph

    2010-01-01

    The human retina is a uniquely accessible tissue. Tools like scanning laser ophthalmoscopy (SLO) and spectral domain optical coherence tomography (SD-OCT) provide clinicians with remarkably clear pictures of the living retina. While the anterior optics of the eye permit such non-invasive visualization of the retina and associated pathology, these same optics induce significant aberrations that in most cases obviate cellular-resolution imaging. Adaptive optics (AO) imaging systems use active optical elements to compensate for aberrations in the optical path between the object and the camera. Applied to the human eye, AO allows direct visualization of individual rod and cone photoreceptor cells, RPE cells, and white blood cells. AO imaging has changed the way vision scientists and ophthalmologists see the retina, helping to clarify our understanding of retinal structure, function, and the etiology of various retinal pathologies. Here we review some of the advances made possible with AO imaging of the human retina, and discuss applications and future prospects for clinical imaging. PMID:21057346

  8. CT and MR imaging diagnosis and staging of hepatocellular carcinoma: part II. Extracellular agents, hepatobiliary agents, and ancillary imaging features.

    PubMed

    Choi, Jin-Young; Lee, Jeong-Min; Sirlin, Claude B

    2014-10-01

    Computed tomography (CT) and magnetic resonance (MR) imaging play critical roles in the diagnosis and staging of hepatocellular carcinoma (HCC). The second article of this two-part review discusses basic concepts of diagnosis and staging, reviews the diagnostic performance of CT and MR imaging with extracellular contrast agents and of MR imaging with hepatobiliary contrast agents, and examines in depth the major and ancillary imaging features used in the diagnosis and characterization of HCC. PMID:25247563

  9. Fluorescence lifetime imaging in biosciences: technologies and applications

    NASA Astrophysics Data System (ADS)

    Niesner, Raluca; Gericke, Karl-Heinz

    2008-02-01

    The biosciences require the development of methods that allow a non-invasive and rapid investigation of biological systems. In this aspect, high-end imaging techniques allow intravital microscopy in real-time, providing information on a molecular basis. Far-field fluorescence imaging techniques are some of the most adequate methods for such investigations. However, there are great differences between the common fluorescence imaging techniques, i.e., wide-field, confocal one-photon and two-photon microscopy, as far as their applicability in diverse bioscientific research areas is concerned. In the first part of this work, we briefly compare these techniques. Standard methods used in the biosciences, i.e., steady-state techniques based on the analysis of the total fluorescence signal originating from the sample, can successfully be employed in the study of cell, tissue and organ morphology as well as in monitoring the macroscopic tissue function. However, they are mostly inadequate for the quantitative investigation of the cellular function at the molecular level. The intrinsic disadvantages of steady-state techniques are countered by using time-resolved techniques. Among these fluorescence lifetime imaging (FLIM) is currently the most common. Different FLIM principles as well as applications of particular relevance for the biosciences, especially for fast intravital studies are discussed in this work.

  10. 15. Application Programming I (Embedded SQL, ODBC, JDBC) 15-1 Part 15: Application

    E-print Network

    Brass, Stefan

    15. Application Programming I (Embedded SQL, ODBC, JDBC) 15-1 Part 15: Application Programming, "Embedded SQL", Chapter 5, "Oracle JDBC". · Michael Gertz: Oracle/SQL Tutorial, 1999. [http.5 Developer's Guide. McGraw-Hill, 1999. · SQL Server Books Online, "Building SQL Server Applications". · Art

  11. 17. Application Programming I (Embedded SQL, ODBC, JDBC) 17-1 Part 17: Application

    E-print Network

    Brass, Stefan

    17. Application Programming I (Embedded SQL, ODBC, JDBC) 17-1 Part 17: Application Programming I, "Embedded SQL", Chapter 5, "Oracle JDBC". · Michael Gertz: Oracle/SQL Tutorial, 1999. [http.5 Developer's Guide. McGraw-Hill, 1999. · SQL Server Books Online, "Building SQL Server Applications". · Art

  12. 16. Application Programming I (Embedded SQL, ODBC, JDBC) 16-1 Part 16: Application

    E-print Network

    Brass, Stefan

    16. Application Programming I (Embedded SQL, ODBC, JDBC) 16-1 Part 16: Application Programming, "Embedded SQL", Chapter 5, "Oracle JDBC". · Michael Gertz: Oracle/SQL Tutorial, 1999. [http.5 Developer's Guide. McGraw-Hill, 1999. · SQL Server Books Online, "Building SQL Server Applications". · Art

  13. Radionuclides in Nephrourology, Part 2: Pitfalls and Diagnostic Applications

    PubMed Central

    Taylor, Andrew T.

    2015-01-01

    Radionuclide renal scintigraphy provides important functional data to assist in the diagnosis and management of patients with a variety of suspected genitourinary tract problems, but the procedures are underutilized. Maximizing the utility of the available studies (as well as the perception of utility by referring physicians) requires a clear understanding of the clinical question, attention to quality control, acquisition of the essential elements necessary to produce an informed interpretation, and production of a report that presents a coherent impression based on data contained in the report and that specifically addresses the clinical question. To help achieve these goals, part 1 of this review addressed the available radiopharmaceuticals, quality control, and quantitative indices, including the measurement of absolute and relative renal function. Part 2 assumes familiarity with part 1 and focuses on the common clinical indications of suspected obstruction and renovascular hypertension; part 2 also summarizes the status of radionuclide renal imaging in the evaluation of the transplanted kidney and the detection of infection, discusses potential pitfalls, and concludes with suggestions for future research. The series of SAM questions accompanying parts 1 and 2 has been designed to reinforce and extend points made in the review. Although the primary focus is the adult patient, aspects of the review also apply to the pediatric population. PMID:24591488

  14. BUILDING IMAGE MOSAICS: AN APPLICATION OF CONTENT-BASED IMAGE RETRIEVAL

    E-print Network

    Zaiane, Osmar R.

    - coln by putting many other images together including his own wife's picture2 . More recently, RobertBUILDING IMAGE MOSAICS: AN APPLICATION OF CONTENT-BASED IMAGE RETRIEVAL Yue Zhang Mario A.ualberta.ca ABSTRACT An image mosaic is an image made up of many other im- ages. In this paper we investigate

  15. Clinical applications of cardiovascular magnetic resonance imaging

    PubMed Central

    Marcu, Constantin B.; Beek, Aernout M.; van Rossum, Albert C.

    2006-01-01

    Cardiovascular magnetic resonance imaging (MRI) has evolved from an effective research tool into a clinically proven, safe and comprehensive imaging modality. It provides anatomic and functional information in acquired and congenital heart disease and is the most precise technique for quantification of ventricular volumes, function and mass. Owing to its excellent interstudy reproducibility, cardiovascular MRI is the optimal method for assessment of changes in ventricular parameters after therapeutic intervention. Delayed contrast enhancement is an accurate and robust method used in the diagnosis of ischemic and nonischemic cardiomyopathies and less common diseases, such as cardiac sarcoidosis and myocarditis. First-pass magnetic contrast myocardial perfusion is becoming an alternative to radionuclide techniques for the detection of coronary atherosclerotic disease. In this review we outline the techniques used in cardiovascular MRI and discuss the most common clinical applications. PMID:17030942

  16. Beyond MusclesUnexplored Parts of Men's Body Image

    Microsoft Academic Search

    Marika Tiggemann; Yolanda Martins; Libby Churchett

    2008-01-01

    Thus far the study of men's body image has been largely restricted to the dimensions of adiposity and muscularity. The aim of this study was to investigate in a systematic way multiple aspects of men's body images, in particular, head hair, body hair, height and penis size, in addition to body weight and muscularity. Questionnaires were completed online by 200

  17. IR Sensors for Imaging and Health Monitoring Applications

    NASA Astrophysics Data System (ADS)

    Gregory, Otto

    2004-03-01

    High-resolution IR detectors for imaging applications are typically based on Schottky monolithic focal plane arrays (PtSi Schottky barrier devices) that are expensive to fabricate and require cryogenic cooling. In applications requiring greater portability and where lower resolution is acceptable (viz. night vision systems used by the military and lightweight cameras used by firefighters), uncooled pyroelectric vidicons are frequently employed. In the vidicon tube, IR radiation is sensed by a pyroelectric target such as triglycine sulfate (TGS), which is read out by scanning an electron beam across the surface (current modulation). The TGS single crystal sensors used in pyroelectric vidicon applications are extremely difficult to fabricate in thin section and can be easily damaged during operation due to their brittle nature. Thus, pyrolectric polymers offer several advantages over TGS sensors in these applications due to their low cost and robustness. However, the pyroelectric polymers traditionally have lower sensitivity. Therefore, we are investigating the pyroelectric performance of a family of copolymers based on poly(vinylidene difluoride-trifluoroethylene) in the compositional range 75/25 to 50/50 moleperformance and sensitivity of these copolymers were compared to that of TGS active sensor elements. Since the sensitivity of these IR sensors is related in part to material thickness, pyroelectric polymers were spin cast from solution to thicknesses <1 micrometer and subsequently used as free-standing thin films. By applying surface treatments and absorptive coatings to the as-cast pyrolectric polymer films, the temperature resolution has been improved to the point where differences between healthy and damaged tissue in the human body can now be distinguished. Examples of IR images of the human body using these pyroelectric polymer vidicon targets will be presented and will be used to provide a direct comparison between TGS and the pyroelectric copolymers in these imaging applications.

  18. Applications of Modern Hydrodynamics to Aeronautics. [in Two Parts

    NASA Technical Reports Server (NTRS)

    Prandtl, L

    1923-01-01

    The report gives, rather briefly, in part one an introduction to hydrodynamics which is designed to give those who have not yet been actively concerned with this science such a grasp of the theoretical underlying principles that they can follow the subsequent developments. In part two there follows a separate discussion of the different questions to be considered, in which the theory of aerofoils claims the greatest portion of the space. The last part is devoted to the application of the aerofoil theory to screw propellers. A table giving the most important quantities is at the end of the report. A short reference list of the literature on the subject and also a table of contents are added.

  19. Modeling, Performance Analysis, and Applications of Digital Image Watermarking Systems

    E-print Network

    Guestrin, Carlos

    199 Modeling, Performance Analysis, and Applications of Digital Image Watermarking Systems Pei the copyright. With this watermarking application­ IIL in mind, we analyze and propose new watermark systems to digital image watermarking systems. In a digital image watermarking system, information carrying watermark

  20. Fundamental performance differences of CMOS and CCD imagers: part V

    NASA Astrophysics Data System (ADS)

    Janesick, James R.; Elliott, Tom; Andrews, James; Tower, John; Pinter, Jeff

    2013-02-01

    Previous papers delivered over the last decade have documented developmental progress made on large pixel scientific CMOS imagers that match or surpass CCD performance. New data and discussions presented in this paper include: 1) a new buried channel CCD fabricated on a CMOS process line, 2) new data products generated by high performance custom scientific CMOS 4T/5T/6T PPD pixel imagers, 3) ultimate CTE and speed limits for large pixel CMOS imagers, 4) fabrication and test results of a flight 4k x 4k CMOS imager for NRL's SoloHi Solar Orbiter Mission, 5) a progress report on ultra large stitched Mk x Nk CMOS imager, 6) data generated by on-chip sub-electron CDS signal chain circuitry used in our imagers, 7) CMOS and CMOSCCD proton and electron radiation damage data for dose levels up to 10 Mrd, 8) discussions and data for a new class of PMOS pixel CMOS imagers and 9) future CMOS development work planned.

  1. Multianode photomultiplier tube studies for imaging applications

    NASA Astrophysics Data System (ADS)

    Montgomery, R. A.; Cowie, E. N.; Hoek, M.; Keri, T.; Seitz, B.

    2012-12-01

    Highly efficient and position sensitive photon detection is essential in a variety of applications from particle identification in fundamental nuclear and particle physics research, to radionuclide imaging in healthcare. Due to their position sensitivity and high packing fraction, the Hamamatsu H8500 and H9500 multianode photomultiplier tubes (MAPMTs) are promising candidates for such applications and have thus been studied through precision laser scans at several light intensities. This has revealed signal and crosstalk dependencies upon constructional features of the MAPMTs. Both MAPMTs feature a common last dynode output signal, which can be used for self-triggering. The strength and timing of this signal have been investigated for the H8500 MAPMT, yielding similar dependencies upon MAPMT construction and standard deviation time resolutions of 67.5 ps and 154.4 ps for 20 and single photoelectron signals respectively.

  2. Image Algebra Application to Image Measurement and Feature Extraction

    NASA Astrophysics Data System (ADS)

    Ritter, Gerhard X.; Wilson, Joseph N.; Davidson, Jennifer L.

    1989-03-01

    It has been well established that the AFATL (Air Force Armament Technical Laboratory) Image Algebra is capable of expressing all image-to-image transformations [1,2] and that it is ideally suited for parallel image transformations {3,4]. In this paper we show how the algebra can also be applied to compactly express image-to-feature transforms including such sequential image-to-feature transforms as chain coding.

  3. Application of Raman-based images in the Earth sciences

    NASA Astrophysics Data System (ADS)

    Nasdala, Lutz; Beyssac, Olivier; William Schopf, J.; Bleisteiner, Bernd

    In this chapter, we describe internal textures ofcrystals, minerals, and mineral assemblages as detected by Ramanspectroscopy. As an introduction, and to underline the motivation ofapplying Raman-based heterogeneity images in the Earth sciences,overviews of the different internal textures and the broad range oftechniques to visualize them are given. Second, a number of Ramanexperimental details are discussed; however, only those which are ofparticular relevance to mineralogical applications. In particular,the different imaging concepts are compared, and it is argued whyEarth scientists prefer to apply hyperspectral Raman maps whereasdirect images, if applied at all, are rarely used in this field.Also, the reader is advised of number of common (and oftenpublished) artfacts related to the Raman analysis of minerals. Themain part of this chapter deals with Raman-based imagesapplied in the Earth sciences. After a brief general overview, whichagain does not claim to be complete, examples for applications inthree selected areas of research are presented in more detail.

  4. TRAINING PERIOD 2013 Image processing for space applications

    E-print Network

    Dobigeon, Nicolas

    TRAINING PERIOD 2013 Image processing for space applications Training title: Monitoring of SPOT6 imaging performances. Field: Operations and R&D Speciality: Image processing Subject Astrium has built. The trainee shall have both a solid image processing background and computer programming skills (Matlab and

  5. Near-infrared spectroscopic tissue imaging for medical applications

    DOEpatents

    Demos; Stavros (Livermore, CA), Staggs; Michael C. (Tracy, CA)

    2006-03-21

    Near infrared imaging using elastic light scattering and tissue autofluorescence are explored for medical applications. The approach involves imaging using cross-polarized elastic light scattering and tissue autofluorescence in the Near Infra-Red (NIR) coupled with image processing and inter-image operations to differentiate human tissue components.

  6. Near-infrared spectroscopic tissue imaging for medical applications

    DOEpatents

    Demos, Stavros (Livermore, CA); Staggs, Michael C. (Tracy, CA)

    2006-12-12

    Near infrared imaging using elastic light scattering and tissue autofluorescence are explored for medical applications. The approach involves imaging using cross-polarized elastic light scattering and tissue autofluorescence in the Near Infra-Red (NIR) coupled with image processing and inter-image operations to differentiate human tissue components.

  7. Evaluation of Polymethine Dyes as Potential Probes for Near Infrared Fluorescence Imaging of Tumors: Part - 1

    PubMed Central

    James, Nadine S.; Chen, Yihui; Joshi, Penny; Ohulchanskyy, Tymish Y.; Ethirajan, Manivannan; Henary, Maged; Strekowsk, Lucjan; Pandey, Ravindra K

    2013-01-01

    Near-infrared (NIR) organic dyes have become important for many biomedical applications, including in vivo optical imaging. Conjugation of NIR fluorescent dyes to photosensitizing molecules (photosensitizers) holds strong potential for NIR fluorescence image guided photodynamic therapy (PDT) of cancer. Therefore, we were interested in investigating the photophysical properties, in vivo tumor-affinity and fluorescence imaging potential of a series of heterocyclic polymethine dyes, which could then be conjugated to certain PDT agents. For our present study, we selected a series of symmetrical polymethine dyes containing a variety of bis-N-substituted indole or benzindole moieties linked by linear conjugation with and without a fused substituted cyclohexene ring. The N-alkyl side chain at the C-terminal position was functionalized with sulfonic, carboxylic acid, methyl ester or hydroxyl groups. Although, among the parent cyanine dyes investigated, the commercially available, cyanine dye IR783 (3) (bis-indole-N-butylsulfonate)-polymethine dye with a cyclic chloro-cyclohexene moiety showed best fluorescence-imaging ability, based on its spectral properties (?Abs=782 nm, ?Fl=810 nm, ? = 261,000 M-1cm-1, ?Fl?0.08) and tumor affinity. In addition to 3, parent dyes IR820 and Cypate (6) were also selected and subjected to further modifications by introducing desired functional groups, which could enable further conjugation of the cyanine dyes to an effective photosensitizer HPPH developed in our laboratory. The synthesis and biological studies (tumor-imaging and PDT) of the resulting bifunctional conjugates are discussed in succeeding paper (Part-2 of this study). PMID:24019854

  8. A Novel Application of Musculoskeletal Ultrasound Imaging

    PubMed Central

    Eranki, Avinash; Cortes, Nelson; Feren?ek, Zrinka Greguri?; Sikdar, Siddhartha

    2013-01-01

    Ultrasound is an attractive modality for imaging muscle and tendon motion during dynamic tasks and can provide a complementary methodological approach for biomechanical studies in a clinical or laboratory setting. Towards this goal, methods for quantification of muscle kinematics from ultrasound imagery are being developed based on image processing. The temporal resolution of these methods is typically not sufficient for highly dynamic tasks, such as drop-landing. We propose a new approach that utilizes a Doppler method for quantifying muscle kinematics. We have developed a novel vector tissue Doppler imaging (vTDI) technique that can be used to measure musculoskeletal contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities using ultrasound. The goal of this preliminary study was to investigate the repeatability and potential applicability of the vTDI technique in measuring musculoskeletal velocities during a drop-landing task, in healthy subjects. The vTDI measurements can be performed concurrently with other biomechanical techniques, such as 3D motion capture for joint kinematics and kinetics, electromyography for timing of muscle activation and force plates for ground reaction force. Integration of these complementary techniques could lead to a better understanding of dynamic muscle function and dysfunction underlying the pathogenesis and pathophysiology of musculoskeletal disorders. PMID:24084063

  9. Magnetic resonance imaging: Principles and applications

    SciTech Connect

    Kean, D.; Smith, M.

    1986-01-01

    This text covers the physics underlying magnetic resonance (MR) imaging; pulse sequences; image production; equipment; aspects of clinical imaging; and the imaging of the head and neck, thorax, abdomen and pelvis, and musculoskeletal system; and MR imaging. The book provides about 150 examples of MR images that give an overview of the pathologic conditions imaged. There is a discussion of the physics of MR imaging and also on the spin echo.

  10. Two satellite image sets for the training and validation of image processing systems for defense applications

    NASA Astrophysics Data System (ADS)

    Peterson, Michael R.; Aldridge, Shawn; Herzog, Britny; Moore, Frank

    2010-04-01

    Many image processing algorithms utilize the discrete wavelet transform (DWT) to provide efficient compression and near-perfect reconstruction of image data. Defense applications often require the transmission of data at high levels of compression over noisy channels. In recent years, evolutionary algorithms (EAs) have been utilized to optimize image transform filters that outperform standard wavelets for bandwidth-constrained compression of satellite images. The optimization of these filters requires the use of training images appropriately chosen for the image processing system's intended applications. This paper presents two robust sets of fifty images each intended for the training and validation of satellite and unmanned aerial vehicle (UAV) reconnaissance image processing algorithms. Each set consists of a diverse range of subjects consisting of cities, airports, military bases, and landmarks representative of the types of images that may be captured during reconnaissance missions. Optimized algorithms may be "overtrained" for a specific problem instance and thus exhibit poor performance over a general set of data. To reduce the risk of overtraining an image filter, we evaluate the suitability of each image as a training image. After evolving filters using each image, we assess the average compression performance of each filter across the entire set of images. We thus identify a small subset of images from each set that provide strong performance as training images for the image transform optimization problem. These images will also provide a suitable platform for the development of other algorithms for defense applications. The images are available upon request from the contact author.

  11. Multispectral Image Fusion for Active Millimeter Wave Imaging Application

    Microsoft Academic Search

    Lixiao Zhang; J. Stiens; H. Sahli

    2008-01-01

    The emerging active millimeter wave imaging technology has the potential to yield much more information when one has control over the illumination parameters such as angle and frequency. In this paper, we propose using image fusion techniques to process multispectral millimeter wave images in order to improve the image quality. Three pixel level fusion methods, based on band ratioing, wavelet

  12. Applications of high-resolution remote sensing image data

    NASA Technical Reports Server (NTRS)

    Strome, W. M.; Leckie, D.; Miller, J.; Buxton, R.

    1990-01-01

    There are many situations in which the image resolution of satellite data is insufficient to provide the detail required for resource management and environmental monitoring. This paper will focus on applications of high-resolution (0.4 to 10 m) airborne multispectral and imaging spectrometer data acquired in Canada using the MEIS II multispectral line imager and the PMI imaging spectrometer. Applications discussed will include forestry, mapping, and geobotany.

  13. [Biological Markers in Epidemiology: Concepts, applications, Perspectives (Part II)].

    PubMed

    Hoffmann, W; Latza, U; Ahrens, W; Greiser, K H; Kroke, A; Nieters, A; Schulze, M B; Steiner, M; Terschüren, C; Wjst, M

    2002-03-01

    The first part of this paper outlined terms and definitions in the context of the application of biological markers in epidemiological studies. Cardiovascular epidemiology served as an example for their historical development. The second part focusses on DNA-based biomarkers, practical and methodological dimensions of the use of biomarkers in analytic epidemiological studies as well as requirements in respect of validity and quality assurance. Most genetic polymorphisms have no impact on health. However, some can be used as biomarkers for individual sensitvity to exposures and susceptibility for specific diseases. The Human Genome Project has brought about a quantum leap in the development of genetic markers. The practical implications cannot presently be assessed with certainty. However, present and future research programmes of gene-environment interactions depend on "traditional" epidemiological study designs, methods, and concepts. Ethical principles and data protection requirements apply equally to genetic and molecular epidemiology as do the "Guidelines for Good Epidemiological Practice". PMID:11904855

  14. Techniques for Fusion of Multimodal Images: Application to Breast Imaging Karl G. Baum1

    E-print Network

    imaging (MRI) [4, 5] have steadily gained acceptance in addition to x-ray mammography and ultrasonography. Initial experience with combined PET (functional imaging) and x-ray computed tomography (CT, anatomicalTechniques for Fusion of Multimodal Images: Application to Breast Imaging Karl G. Baum1 , Maria

  15. KeyDependent Random Image Transforms and Their Applications in Image Watermarking

    E-print Network

    Fridrich, Jessica

    Key­Dependent Random Image Transforms and Their Applications in Image Watermarking Jiri Fridrich for digital image watermarking. The algorithm first generates a set of k random smooth vectors of length N for construction of ultra secure image watermarking methods and nonlinear secure public watermark detectors

  16. Application of Wavelets Analysis in Image Denoising

    Microsoft Academic Search

    Xiao-Feng Gu; Jin-Xin Shi; Jian-Ping Li; Yuan-Yuan Huang; Jie Lin

    2008-01-01

    Aiming at the problems of images denoising, wavelet algorithm is introduced simply. The technology of images denoising based on wavelet are analyzed in detail. Image denoising is achieved by Matlab. Two thresholding in the process of image denoising are compared by the results of experiments. Meanwhile, the advantages of image denoising by wavelet is proved.

  17. An approach to automatic detection of body parts and their size estimation from computed tomography image

    NASA Astrophysics Data System (ADS)

    Acharyya, Mausumi; Stoeckel, Jonathan; M. S., Dinesh

    2009-02-01

    Computer-aided diagnosis (CAD) systems usually require information about regions of interest in images, like: lungs (for nodule detection), colon (for identifying polyps), etc. Many times, it is computationally intensive to process large data sets as in CT to find these areas of interest. A fast and accurate recognition of the different regions of interest in the human body from images is therefore necessary. In this paper we propose a fast and efficient algorithm that can detect the organs of interest in a CT volume and estimate their sizes. Instead of analyzing the whole 3D volume; which is computationally expensive, a binary search technique is adapted to search in a few slices. The slices selected in the search process is segmented and different regions are labeled. Decision over whether the image belongs to a lung or colon or both is based on the count of lung/colon pixels in the slice. Once the detection is done we look for the start and end slice of the body part to have an estimate of their sizes. The algorithm involves certain search decisions based on some predefined threshold values which are empirically chosen from a training data set. The effectiveness of our technique is confirmed by applying it on an independent test data set. Detection accuracy of 100% is obtained on a test set. This algorithm can be integrated in a CAD system for running the right application, or can be used in pre-sets for visualization purposes and other post-processing like image registration etc.

  18. Modeling and Imaging Techniques with Potential for Application in Bioterrorism

    E-print Network

    Modeling and Imaging Techniques with Potential for Application in Bioterrorism H.T. Banks 1 , David signi#12;cant potential for applications related to bioterrorism. The #12;rst focuses on physiologically

  19. Image and video fingerprinting: forensic applications

    NASA Astrophysics Data System (ADS)

    Lefebvre, Frédéric; Chupeau, Bertrand; Massoudi, Ayoub; Diehl, Eric

    2009-02-01

    Fighting movie piracy often requires automatic content identification. The most common technique to achieve this uses watermarking, but not all copyrighted content is watermarked. Video fingerprinting is an efficient alternative solution to identify content, to manage multimedia files in UGC sites or P2P networks and to register pirated copies with master content. When registering by matching copy fingerprints with master ones, a model of distortion can be estimated. In case of in-theater piracy, the model of geometric distortion allows the estimation of the capture location. A step even further is to determine, from passive image analysis only, whether different pirated versions were captured with the same camcorder. In this paper we present three such fingerprinting-based forensic applications: UGC filtering, estimation of capture location and source identification.

  20. Advances in Clinical and Biomedical Applications of Photoacoustic Imaging

    PubMed Central

    Su, Jimmy L.; Wang, Bo; Wilson, Katheryne E.; Bayer, Carolyn L.; Chen, Yun-Sheng; Kim, Seungsoo; Homan, Kimberly A.; Emelianov, Stanislav Y.

    2010-01-01

    Importance of the field Photoacoustic imaging is an imaging modality that derives image contrast from the optical absorption coefficient of the tissue being imaged. The imaging technique is able to differentiate between healthy and diseased tissue with either deeper penetration or higher resolution than other functional imaging modalities currently available. From a clinical standpoint, photoacoustic imaging has demonstrated safety and effectiveness in diagnosing diseased tissue regions using either endogenous tissue contrast or exogenous contrast agents. Furthermore, the potential of photoacoustic imaging has been demonstrated in various therapeutic interventions ranging from drug delivery and release to image-guided therapy and monitoring. Areas covered in this review This article reviews the current state of photoacoustic imaging in biomedicine from a technological perspective, highlights various biomedical and clinical applications of photoacoustic imaging, and gives insights on future directions. What the reader will gain Readers will learn about the various applications of photoacoustic imaging, as well as the various contrast agents that can be used to assist photoacoustic imaging. This review will highlight both pre-clinical and clinical uses for photoacoustic imaging, as well as discuss some of the challenges that must be addressed to move photoacoustic imaging into the clinical realm. Take home message Photoacoustic imaging offers unique advantages over existing imaging modalities. The imaging field is broad with many exciting applications for detecting and diagnosing diseased tissue or processes. Photoacoustics is also used in therapeutic applications to identify and characterize the pathology and then to monitor the treatment. Although the technology is still in its infancy, much work has been done in the pre-clinical arena, and photoacoustic imaging is fast approaching the clinical setting. PMID:21344060

  1. Geometric algebra colour image representations and derived total orderings for morphological operators Part I: Colour quaternions

    E-print Network

    Angulo,Jesús

    operators ­ Part I: Colour quaternions Jesús Angulo * CMM ­ Centre de Morphologie Mathématique mathematical morphology Colour quaternion Quaternion total ordering Nonlinear colour filtering Colour feature extraction Colour image representation Hypercomplex representation Colour potential function Quaternion

  2. New impedance and electrochemical image techniques for biological applications

    NASA Astrophysics Data System (ADS)

    Tao, N. J.

    2010-03-01

    A method to image local surface impedance and electrochemical current optically is developed for biological applications. The principle of the impedance imaging is based on sensitive dependence of surface plasmon resonance (SPR) on local surface charge density. The technique can image local surface impedance and charge while providing simultaneously a conventional surface plasmon resonance (SPR) image. By applying a potential modulation to a sensor surface, it is possible to obtain an image of the DC component, and the amplitude and phase images of the AC component. The DC image provides local molecular binding, as found in the conventional SPR imaging technique. The AC images are directly related to the local impedance of the surface. This imaging capability may be used as a new detection platform for DNA and protein microarrays, a new method for analyzing local molecular binding and interfacial processes and a new tool for imaging cells and tissues.

  3. Imaging of Micromotion Targets With Rotating Parts Based on Empirical-Mode Decomposition

    Microsoft Academic Search

    Xueru Bai; Mengdao Xing; Feng Zhou; Guangyue Lu; Zheng Bao

    2008-01-01

    For micromotion targets with rotating parts, the inverse synthetic-aperture-radar image of the main body may be shadowed by the micro-Doppler. To solve this problem, this paper proposes an imaging algorithm based on the complex-valued empirical-mode decomposition. First, the radar echoes are decomposed into a series of complex-valued intrinsic-mode functions (IMFs). Then, the IMFs from the rotating parts and those from

  4. Numerical and Experimental Applications of TWIP Steel in Automotive Parts

    NASA Astrophysics Data System (ADS)

    Lee, J. W.; Lim, J. H.; Choi, J. B.; Oh, P. Y.

    2011-08-01

    Modern automotive design has been faced with the weight reduction problem to meet the CO2 emissions standard while achieving high safety and compact design. Such being the case, most car makers want to use the ultra high strength steels (UHSS). But there are several problems when such steels are used, due to presumed lack of formability. Since the disadvantage such as above, it has been suggested that UHSS need special forming methods or it should be used only limited process like simple bending, by many automotive research institutes. To overcome these shortcomings, Twinning Induced Plasticity (TWIP) steel for improved strength and formability has been developed by steel making company, including POSCO, Korea. Because of its characteristics, it is expected to be widely used in automotive parts. This paper aims at finding out several ways how to make effective use of TWIP steel in automotive parts. Especially, comprising about from 15 to 18% manganese and from 1.5 to 2% aluminum which was developed by POSCO for application of the automotive parts will be considered.

  5. Application of nuclear magnetic resonance imaging and spectroscopy to fluids in porous media

    E-print Network

    Mandava, Shanthi Sree

    1991-01-01

    Watson (Chair of Committee) Raymond W. Flumerfelt (Member) James F. Haw (Member) Raymond W. Fl merfelt (Head of Department) May 1991 ABSTRACT Application of Nuclear Magnetic Resonance Imaging and Spectroscopy to Fluids in Porous Media. (May 1991...-echo sequence. This part of the work was preliminary research done for a better understanding of fluid diffusion and coefficients. Magnetic Resonance Imaging (MRI) of a series of two phase immiscible displacements was conducted to monitor the flow processes...

  6. VR interaction techniques for medical imaging applications.

    PubMed

    Krapichler, C; Haubner, M; Engelbrecht, R; Englmeier, K H

    1998-04-01

    Methods of virtual reality (VR) offer new ways of human-computer interaction. Medicine is predestined to benefit from this new technology in many ways. Virtual environments can support physicians in their work, alleviate communication between specialists from different fields or be established in educational and training applications. For the field of visualization and analysis of three-dimensional anatomical images (e.g. CT or MRI scans), an application is introduced which expedites recognition of spatial coherencies and the exploration and manipulation of the 3D data. To avoid long periods of learning and accustoming and to facilitate work in such an environment, a powerful human-oriented interface is required allowing interactions similar to the real world and utilization of our natural experiences. This paper shows the use of eye tracking parameters for a level-of-detail algorithm and the integration of a glove-based hand gesture recognition into the virtual environment as an essential component of the human-machine interface. Furthermore, virtual bronchoscopy and virtual angioscopy are presented as examples for the use of the virtual environment. PMID:9617528

  7. 40 CFR 132.6 - Application of part 132 requirements in Great Lakes States and Tribes.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Application of part 132 requirements in Great Lakes States and Tribes. 132.6... WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM § 132.6 Application of part 132 requirements in Great Lakes States and Tribes....

  8. 40 CFR 132.6 - Application of part 132 requirements in Great Lakes States and Tribes.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Application of part 132 requirements in Great Lakes States and Tribes. 132.6... WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM § 132.6 Application of part 132 requirements in Great Lakes States and Tribes....

  9. 40 CFR 132.6 - Application of part 132 requirements in Great Lakes States and Tribes.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Application of part 132 requirements in Great Lakes States and Tribes. 132.6... WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM § 132.6 Application of part 132 requirements in Great Lakes States and Tribes....

  10. 40 CFR 132.6 - Application of part 132 requirements in Great Lakes States and Tribes.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Application of part 132 requirements in Great Lakes States and Tribes. 132.6... WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM § 132.6 Application of part 132 requirements in Great Lakes States and Tribes....

  11. 33 CFR Appendix G to Part 157 - Timetables for Application of Double Hull Requirements

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Timetables for Application of Double Hull Requirements G Appendix G to Part 157 Navigation and Navigable Waters COAST GUARD...RELATING TO TANK VESSELS CARRYING OIL IN BULK Pt. 157, App. G Appendix G to Part 157—Timetables for Application...

  12. 33 CFR Appendix G to Part 157 - Timetables for Application of Double Hull Requirements

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Timetables for Application of Double Hull Requirements G Appendix G to Part 157 Navigation and Navigable Waters COAST GUARD...RELATING TO TANK VESSELS CARRYING OIL IN BULK Pt. 157, App. G Appendix G to Part 157—Timetables for Application...

  13. 33 CFR Appendix G to Part 157 - Timetables for Application of Double Hull Requirements

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Timetables for Application of Double Hull Requirements G Appendix G to Part 157 Navigation and Navigable Waters COAST GUARD...RELATING TO TANK VESSELS CARRYING OIL IN BULK Pt. 157, App. G Appendix G to Part 157—Timetables for Application...

  14. RESOLUTION AND STABILITY ANALYSIS IN LINEARIZED CONDUCTIVITY AND WAVE IMAGING. PART I: FULL

    E-print Network

    Solna, Knut

    . RESOLUTION AND STABILITY ANALYSIS IN LINEARIZED CONDUCTIVITY AND WAVE IMAGING. PART I: FULL. 35R30, 35B30. Key words and phrases. Inverse conductivity problem, wave imaging, resolution APERTURE CASE HABIB AMMARI, JOSSELIN GARNIER, AND KNUT SØLNA Abstract. In this paper we consider resolution

  15. HURRICANE IMAGING RADIOMETER WIND SPEED AND RAIN RATE RETRIEVAL: [PART-1] DEVELOPMENT OF AN IMPROVED OCEAN

    E-print Network

    Ruf, Christopher

    HURRICANE IMAGING RADIOMETER WIND SPEED AND RAIN RATE RETRIEVAL: [PART-1] DEVELOPMENT U.S.A * selnimri@mail.ucf.edu 2 NOAA/AOML/Hurricane Research Division, Miami, Florida, USA 3 Space model has been developed to support the analysis and design of the new airborne Hurricane Imaging

  16. Infrared imaging technology and biological applications.

    PubMed

    Kastberger, Gerald; Stachl, Reinhold

    2003-08-01

    Temperature is the most frequently measured physical quantity, second only to time. Infrared (IR) technology has been utilized successfully in astronomy (for a summary,see Hermans-Killam, 2002b) and in industrial and research settings (Gruner, 2002; Madding, 1982, 1989; Wolfe & Zissis, 1993) for decades. However, fairly recent innovations have reduced costs, increased reliability, and resulted in noncontact IR sensors offering mobile, smaller units of measurement (EOI, 2002; Flir, 2000, 2001,2002). The advantages of using IR imaging are (1) rapidity in the millisecond range, facilitating measurement of moving targets, (2) noncontact procedures, allowing measurements of hazardous or physically inaccessible objects, (3) no interference and no energy lost from the target, (4) no risk of contamination, and (5) no mechanical effect on the surface of the object. All these factors have led to IR technology's becoming an area of interest for new kinds of applications and users. In both manufacturing and quality control, temperature plays an important role as an indicator of the condition of a product or a piece of machinery (EOI, 2002; Flir, 2000, 2001, 2002; Raytek, 2002). In medical and veterinary applications, IR thermometry is increasingly used in organ diagnostics, in the evaluation of sports injuries and the progression of therapy, in disease evaluation (e.g, breast cancer, arthritis, and SARS; Flir, 2003), and in injury and inflammation examinations in horses, livestock (Tivey & Banhazi, 2002), and zoo animals (Hermans-Killam, 2002a; Thiesbrummel, 2002). Lastly, physiological expressions of life processes in animals (Kastberger, Winder, & Steindl, 2001; Stabentheiner, Kovac, & Hagmüller, 1995; Stabentheiner, Kovac, & Schmaranzer, 2002; Stabentheiner & Schmarnzer, 1987) and plants (Bermadinger-Stabentheiner & Stabentheiner, 1995) can be monitored. The most recent field in which IR technology has been applied is animal behavior. This article focuses on the practical options for noncontact IR thermometry--in particular, in biological applications. PMID:14587551

  17. Interpolating Scaling Vectors: Application to Signal and Image Denoising

    E-print Network

    Dahlke, Stephan

    : Interpolating scaling vectors, multiwavelets, sig- nal/image denoising, wavelet thresholding. AMS subjectInterpolating Scaling Vectors: Application to Signal and Image Denoising Karsten Koch Philipps of the interpolating orthonormal scaling vectors constructed in [10] to signal and image denoising. The results

  18. Application of Uncooled Monolithic Thermoelectric Linear Arrays to Imaging Radiometers

    NASA Astrophysics Data System (ADS)

    Kruse, Paul W.

    Introduction Identification of Incipient Failure of Railcar Wheels Technical Description of the Model IR 1000 Imaging Radiometer Performance of the Model IR 1000 Imaging Radiometer Initial Application Summary Imaging Radiometer for Predictive and Preventive Maintenance Description Operation Specifications Summary References INDEX CONTENTS OF VOLUMES IN THIS SERIES

  19. Diffuse Reflectance Imaging with Astronomical Applications Samuel W. Hasinoff

    E-print Network

    Freeman, William T.

    Diffuse Reflectance Imaging with Astronomical Applications Samuel W. Hasinoff TTIC Anat Levin (and potentially the lighting) vary over time. Diffuse reflectance imaging is particularly relevant, diffuse reflectance imaging expands our notion of what can qualify as a camera. 1. Introduction Diffuse

  20. An infrared high rate video imager for various space applications

    Microsoft Academic Search

    Hâkan Svedhem; Detlef Koschny

    2010-01-01

    Modern spacecraft with high data transmission capabilities have opened up the possibility to fly video rate imagers in space. Several fields concerned with observations of transient phenomena can benefit significantly from imaging at video frame rate. Some applications are observations and characterization of bolides\\/meteors, sprites, lightning, volcanic eruptions, and impacts on airless bodies. Applications can be found both on low

  1. Multimodal Display Techniques with Application to Breast Imaging

    E-print Network

    with combined PET (metabolic imaging) and x-ray computed tomography (CT, anatomical localization) hasMultimodal Display Techniques with Application to Breast Imaging K.M. Rafferty, K.G. Baum, E Technique k. Unfused Distance XII. Summary XIII. Acknowledgment I. Introduction a. The Problem Application

  2. Application of signal detection theory to optics. [image evaluation and restoration

    NASA Technical Reports Server (NTRS)

    Helstrom, C. W.

    1973-01-01

    Basic quantum detection and estimation theory, applications to optics, photon counting, and filtering theory are studied. Recent work on the restoration of degraded optical images received at photoelectrically emissive surfaces is also reported, the data used by the method are the numbers of electrons ejected from various parts of the surface.

  3. An Interactive Case-Based Reasoning System for the Development of Image Processing Applications

    E-print Network

    Paris-Sud XI, Université de

    An Interactive Case-Based Reasoning System for the Development of Image Processing Applications, developers must be in a position to reuse parts of pre-existing treatments. To implement reusability, a Case-Based knowledge. Case- Based Reasoning (CBR) provides some kind of answer to the selective memory issue

  4. Surface measurement and tracking of human body parts from multi-image video sequences

    Microsoft Academic Search

    Nicola D'Apuzzo

    2002-01-01

    This paper describes a method to measure and track moving surfaces of human body parts from multi-image video sequences acquired simultaneously by several cameras. The gained 3-D data can be of two different types: surface measurement of the visible parts of the human body at each time step of the sequence and surface tracking in the form of a vector

  5. Structure localization in brain images: application to relevant image selection.

    PubMed Central

    Sinha, U.; Taira, R.; Kangarloo, H.

    2001-01-01

    Recent advances in imaging have lead to increases in the number of images/study. Automated methods to select relevant images are critical to effectively convey study results. The proposed method combines natural language processing (NLP) and automatic structure localization to identify relevant images of a MR brain study. NLP extracts relevant locations of findings. Two algorithms were implemented and evaluated for structure localization. The first method involves registration of patient dataset to a labeled atlas. The second method involves an eigenimage search using a training set of images. A prototype was developed and tested on MR brain studies of nine patients. With the registration method, slices containing the relevant structure agreed with expert selection in 98% of cases. Structure localization by eigenimage search was able to locate the lateral ventricles correctly in all the test cases. The proposed method provides an accurate method for identifying relevant slices of an imaging study. PMID:11837219

  6. 17 CFR 210.1-01 - Application of Regulation S-X (17 CFR part 210).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 false Application of Regulation S-X (17 CFR part 210). 210.1-01 Section...ACT OF 1975 Application of Regulation S-X (17 Cfr Part 210) § 210.1-01 Application of Regulation S-X (17 CFR part 210). (a) This...

  7. 17 CFR 210.1-01 - Application of Regulation S-X (17 CFR part 210).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...2012-04-01 false Application of Regulation S-X (17 CFR part 210). 210.1-01 Section...ACT OF 1975 Application of Regulation S-X (17 Cfr Part 210) § 210.1-01 Application of Regulation S-X (17 CFR part 210). (a) This...

  8. 17 CFR 210.1-01 - Application of Regulation S-X (17 CFR part 210).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...2013-04-01 false Application of Regulation S-X (17 CFR part 210). 210.1-01 Section...ACT OF 1975 Application of Regulation S-X (17 Cfr Part 210) § 210.1-01 Application of Regulation S-X (17 CFR part 210). (a) This...

  9. 17 CFR 210.1-01 - Application of Regulation S-X (17 CFR part 210).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...2011-04-01 false Application of Regulation S-X (17 CFR part 210). 210.1-01 Section...ACT OF 1975 Application of Regulation S-X (17 Cfr Part 210) § 210.1-01 Application of Regulation S-X (17 CFR part 210). (a) This...

  10. 17 CFR 210.1-01 - Application of Regulation S-X (17 CFR part 210).

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...2014-04-01 false Application of Regulation S-X (17 CFR part 210). 210.1-01 Section...ACT OF 1975 Application of Regulation S-X (17 Cfr Part 210) § 210.1-01 Application of Regulation S-X (17 CFR part 210). (a) This...

  11. The Fringe-Imaging Skin Friction Technique PC Application User's Manual

    NASA Technical Reports Server (NTRS)

    Zilliac, Gregory G.

    1999-01-01

    A personal computer application (CXWIN4G) has been written which greatly simplifies the task of extracting skin friction measurements from interferograms of oil flows on the surface of wind tunnel models. Images are first calibrated, using a novel approach to one-camera photogrammetry, to obtain accurate spatial information on surfaces with curvature. As part of the image calibration process, an auxiliary file containing the wind tunnel model geometry is used in conjunction with a two-dimensional direct linear transformation to relate the image plane to the physical (model) coordinates. The application then applies a nonlinear regression model to accurately determine the fringe spacing from interferometric intensity records as required by the Fringe Imaging Skin Friction (FISF) technique. The skin friction is found through application of a simple expression that makes use of lubrication theory to relate fringe spacing to skin friction.

  12. Diagnostic imaging of the equine tarsal region using radiography and ultrasonography. Part 2: bony disorders.

    PubMed

    Vanderperren, Katrien; Raes, Els; Bree, Henri Van; Saunders, Jimmy H

    2009-02-01

    This is the second part of a two-part review of the structures and disorders of the equine tarsus. In this part the bones of the tarsal region are considered and the technical aspects of taking radiographic, ultrasonographic and scintigraphic images of the different lesions are addressed. The diagnostic use of arthroscopy, computed tomography and magnetic resonance are discussed. In current clinical practice the most frequently used combination to arrive at a diagnosis is still radiography and ultrasonography. PMID:17937999

  13. Algorithms for radiological image registration and their clinical application

    PubMed Central

    HAWKES, D. J.

    1998-01-01

    This paper reviews recent work in radiological image registration and provides a classification of image registration by type of transformation and by methods employed to compute the transformation. The former includes transformation of 2D images to 2D images of the same individual, transformation of 3D images to 3D images of the same individual, transformation of images to an atlas or model, transformation of images acquired from a number of individuals, transformations for image guided interventions including 2D to 3D registration and finally tissue deformation in image guided interventions. Recent work on computing transformations for registration using corresponding landmark based registration, surface based registration and voxel similarity measures, including entropy based measures, are reviewed and compared. Recently fully automated algorithms based on voxel similarity measures and, in particular, mutual information have been shown to be accurate and robust at registering images of the head when the rigid body assumption is valid. Two approaches to modelling soft tissue deformation for applications in image guided interventions are described. Validation of complex processing tasks such as image registration is vital if these algorithms are to be used in clinical practice. Three alternative validation strategies are presented. These methods are finding application outside the original domain of radiological imaging. PMID:9877290

  14. Novel multispectral imaging microscope with applications to biomedicine

    NASA Astrophysics Data System (ADS)

    Zeng, Libo; Wu, Qiongshui; Ke, Hengyu; Zheng, Hong; Hu, Yaojun; Ding, Yi

    2005-03-01

    This paper describes a novel multispectral imaging microscope that can simultaneously record both spectral and spatial information of a sample, which can take advantage of spatial image processing and spectroscopic analysis techniques. A Liquid Crystal Tunable Filter device is used for fast wavelength selection and a cooled two-dimensional monochrome CCD for image detection. In order to acquire images that are not so dependent on imaging devices, a clever CCD exposure time control and a software based spectral and spatial calibration process is performed to diminish the influence of illumination, optic ununiformity, CCD"s spectral response curve and optic throughput property. A set of multispectral image processing and analysis software package is developed, which covers not only general image processing and analysis functions, and also provides powerful analysis tools for multispectral image data, including multispectral image acquisition, illumination and system response calibration, spectral analysis and etc. The combination of spatial and spectral analysis makes it an ideal tool for the applications to biomedicine. In this paper, two applications in biomedicine are also presented. One is medical image segmentation. Using multispectral imaging techniques, a mass of experiments on both marrow bone and cervical cell images showed that our segmentation results are highly satisfactory while with low computational cost. Another is biological imaging spectroscopic analysis in the study of pollen grains in rice. The results showed that the transmittance analysis of multispectral pollen images can accurately identify the pollen abortion stage of male-sterile rice, and can easily distinguish a variety of male sterile cytoplasm.

  15. Moment-based approaches in imaging part 2: invariance

    PubMed Central

    Shu, Huazhong; Luo, Limin; Coatrieux, Jean-Louis

    2005-01-01

    The several moment families have been reviewed in a first paper [1]. A classification was proposed in order to get a better understanding of their relations. More attention was given to orthogonal moments (in particular Legendre, Zernike, Tchebichef, Krawtchouk, Racah, dual Hahn). Important properties for computer vision applications were just sketched, among which invariance and robustness to noise. These properties may drive the choice of moments when addressing a specific problem. A short, thus non-exhaustive, review of the literature on these issues is proposed in this second paper. PMID:18270055

  16. Use of modulated excitation signals in medical ultrasound. Part III: high frame rate imaging

    Microsoft Academic Search

    Thanassis Misaridis; Jørgen Arendt Jensen

    2005-01-01

    For pt.II, see ibid., vol.52, no.2, p.192-207 (2005). This paper, the last from a series of three papers on the application of coded excitation signals in medical ultrasound, investigates the possibility of increasing the frame rate in ultrasound imaging by using modulated excitation signals. Linear array-coded imaging and sparse synthetic transmit aperture imaging are considered, and the trade-offs between frame

  17. Nonlinear approximation based image recovery using adaptive sparse reconstructions and iterated denoising-part I: theory

    Microsoft Academic Search

    Onur G. Guleryuz

    2006-01-01

    We study the robust estimation of missing regions in images and video using adaptive, sparse reconstructions. Our primary application is on missing regions of pixels containing textures, edges, and other image features that are not readily handled by prevalent estimation and recovery algorithms. We assume that we are given a linear transform that is expected to provide sparse decompositions over

  18. Image stabilization algorithms for video-surveillance applications

    Microsoft Academic Search

    Lucio Marcenaro; Carlo S. Regazzoni; Gianni Vernazza

    2001-01-01

    An image stabilization algorithm is presented that is specifically oriented toward video-surveillance applications. The proposed approach is based on a novel motion-compensation method that is an adaptation of a well-known image-stabilization algorithm for visualization in video-surveillance applications. In particular, the illustrated methods take into account the specificity of typical video-surveillance applications, where objects moving in a scene often cover a

  19. Seismic shock and vibration isolation 1995. Part 2: Applications

    SciTech Connect

    Mok, G.C. [Lawrence Livermore National Lab., CA (United States); Chung, H.H. [Argonne National Lab., IL (United States)

    1995-07-11

    As pointed out in the introduction of Part 1, the isolation strategy can be used to effectively decouple a` structure from its environment and thus the structure can be protected from damaging seismic loads or unwanted vibrations and noises from the environment. The method has been used for solving vibration and shock problems in machinery and equipment for many years, but its application to the protection of structures from seismic loadings is relatively recent. Owing to the current interest generated by the Northridge and Kobe earthquakes, an but one of the papers in this publication deal with seismic isolation. The one paper on vibration isolation by Yonekura discusses a measure to protect buildings from detrimental excitations of running trains. Seismic or base isolation has been used to protect bridges, buildings, industrial facilities, and nuclear reactors from damaging seismic loads since 1970. For each of these applications base isolation offers some unique advantages that the conventional strengthening method cannot. Some of these advantages are discussed in papers presented in this publication.

  20. 24 CFR 880.105 - Applicability to proposals and projects under 24 CFR part 811.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Applicability to proposals and projects under 24 CFR part...PROGRAM FOR NEW CONSTRUCTION Summary and Applicability § 880.105 Applicability to proposals and projects under 24 CFR...

  1. 24 CFR 881.105 - Applicability to proposals and projects under 24 CFR part 811.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Applicability to proposals and projects under 24 CFR part...SUBSTANTIAL REHABILITATION Summary and Applicability § 881.105 Applicability to proposals and projects under 24 CFR...

  2. Diffusion tensor imaging: Concepts and applications

    Microsoft Academic Search

    Denis Le Bihan; Cyril Poupon; Chris A. Clark; Sabina Pappata; Nicolas Molko; Hughes Chabriat

    2001-01-01

    The success of diffusion magnetic resonance imaging (MRI) is deeply rooted in the powerful concept that during their random, diffusion-driven displacements molecules probe tissue structure at a microscopic scale well beyond the usual image resolution. As diffusion is truly a three- dimensional process, molecular mobility in tissues may be anisotropic, as in brain white matter. With diffusion tensor imaging (DTI),

  3. Image segmentation by iterative parallel region growing with application to data compression and image analysis

    NASA Technical Reports Server (NTRS)

    Tilton, James C.

    1988-01-01

    Image segmentation can be a key step in data compression and image analysis. However, the segmentation results produced by most previous approaches to region growing are suspect because they depend on the order in which portions of the image are processed. An iterative parallel segmentation algorithm avoids this problem by performing globally best merges first. Such a segmentation approach, and two implementations of the approach on NASA's Massively Parallel Processor (MPP) are described. Application of the segmentation approach to data compression and image analysis is then described, and results of such application are given for a LANDSAT Thematic Mapper image.

  4. Perceived Image Quality Improvements from the Application of Image Deconvolution to Retinal Images from an Adaptive Optics Fundus Imager

    NASA Astrophysics Data System (ADS)

    Soliz, P.; Nemeth, S. C.; Erry, G. R. G.; Otten, L. J.; Yang, S. Y.

    Aim: The objective of this project was to apply an image restoration methodology based on wavefront measurements obtained with a Shack-Hartmann sensor and evaluating the restored image quality based on medical criteria.Methods: Implementing an adaptive optics (AO) technique, a fundus imager was used to achieve low-order correction to images of the retina. The high-order correction was provided by deconvolution. A Shack-Hartmann wavefront sensor measures aberrations. The wavefront measurement is the basis for activating a deformable mirror. Image restoration to remove remaining aberrations is achieved by direct deconvolution using the point spread function (PSF) or a blind deconvolution. The PSF is estimated using measured wavefront aberrations. Direct application of classical deconvolution methods such as inverse filtering, Wiener filtering or iterative blind deconvolution (IBD) to the AO retinal images obtained from the adaptive optical imaging system is not satisfactory because of the very large image size, dificulty in modeling the system noise, and inaccuracy in PSF estimation. Our approach combines direct and blind deconvolution to exploit available system information, avoid non-convergence, and time-consuming iterative processes. Results: The deconvolution was applied to human subject data and resulting restored images compared by a trained ophthalmic researcher. Qualitative analysis showed significant improvements. Neovascularization can be visualized with the adaptive optics device that cannot be resolved with the standard fundus camera. The individual nerve fiber bundles are easily resolved as are melanin structures in the choroid. Conclusion: This project demonstrated that computer-enhanced, adaptive optic images have greater detail of anatomical and pathological structures.

  5. Short-Lag Spatial Coherence Imaging on Matrix Arrays, Part I: Beamforming Methods and Simulation Studies

    PubMed Central

    Hyun, Dongwoon; Trahey, Gregg E.; Jakovljevic, Marko; Dahl, Jeremy J.

    2014-01-01

    Short-lag spatial coherence (SLSC) imaging is a beamforming technique that has demonstrated improved imaging performance compared with conventional B-mode imaging in previous studies. Thus far, the use of 1-D arrays has limited coherence measurements and SLSC imaging to a single dimension. Here, the SLSC algorithm is extended for use on 2-D matrix array transducers and applied in a simulation study examining imaging performance as a function of subaperture configuration and of incoherent channel noise. SLSC images generated with a 2-D array yielded superior contrast-to-noise ratio (CNR) and texture SNR measurements over SLSC images made on a corresponding 1-D array and over B-mode imaging. SLSC images generated with square subapertures were found to be superior to SLSC images generated with subapertures of equal surface area that spanned the whole array in one dimension. Subaperture beamforming was found to have little effect on SLSC imaging performance for subapertures up to 8 × 8 elements in size on a 64 × 64 element transducer. Additionally, the use of 8 × 8, 4 × 4, and 2 × 2 element subapertures provided 8, 4, and 2 times improvement in channel SNR along with 2640-, 328-, and 25-fold reduction in computation time, respectively. These results indicate that volumetric SLSC imaging is readily applicable to existing 2-D arrays that employ subaperture beamforming. PMID:24960700

  6. An image denoising application using shearlets

    NASA Astrophysics Data System (ADS)

    Sevindir, Hulya Kodal; Yazici, Cuneyt

    2013-10-01

    Medical imaging is a multidisciplinary field related to computer science, electrical/electronic engineering, physics, mathematics and medicine. There has been dramatic increase in variety, availability and resolution of medical imaging devices for the last half century. For proper medical imaging highly trained technicians and clinicians are needed to pull out clinically pertinent information from medical data correctly. Artificial systems must be designed to analyze medical data sets either in a partially or even a fully automatic manner to fulfil the need. For this purpose there has been numerous ongoing research for finding optimal representations in image processing and computer vision [1, 18]. Medical images almost always contain artefacts and it is crucial to remove these artefacts to obtain healthy results. Out of many methods for denoising images, in this paper, two denoising methods, wavelets and shearlets, have been applied to mammography images. Comparing these two methods, shearlets give better results for denoising such data.

  7. Designing Tracking Software for Image-Guided Surgery Applications: IGSTK Experience

    PubMed Central

    Enquobahrie, Andinet; Gobbi, David; Turek, Matt; Cheng, Patrick; Yaniv, Ziv; Lindseth, Frank; Cleary, Kevin

    2009-01-01

    Objective Many image-guided surgery applications require tracking devices as part of their core functionality. The Image-Guided Surgery Toolkit (IGSTK) was designed and developed to interface tracking devices with software applications incorporating medical images. Methods IGSTK was designed as an open source C++ library that provides the basic components needed for fast prototyping and development of image-guided surgery applications. This library follows a component-based architecture with several components designed for specific sets of image-guided surgery functions. At the core of the toolkit is the tracker component that handles communication between a control computer and navigation device to gather pose measurements of surgical instruments present in the surgical scene. The representations of the tracked instruments are superimposed on anatomical images to provide visual feedback to the clinician during surgical procedures. Results The initial version of the IGSTK toolkit has been released in the public domain and several trackers are supported. The toolkit and related information are available at www.igstk.org. Conclusion With the increased popularity of minimally invasive procedures in health care, several tracking devices have been developed for medical applications. Designing and implementing high-quality and safe software to handle these different types of trackers in a common framework is a challenging task. It requires establishing key software design principles that emphasize abstraction, extensibility, reusability, fault-tolerance, and portability. IGSTK is an open source library that satisfies these needs for the image-guided surgery community. PMID:20037671

  8. Pixel Detectors for Particle Detection and Imaging Applications

    E-print Network

    Norbert Wermes

    2002-09-07

    Semiconductor pixel detectors offer features for the detection of radiation which are interesting for particle physics detectors as well as for imaging e.g. in biomedical applications (radiography, autoradiography, protein crystallography) or in Xray astronomy. At the present time hybrid pixel detectors are technologically mastered to a large extent and large scale particle detectors are being built. Although the physical requirements are often quite different, imaging applications are emerging and interesting prototype results are available. Monolithic detectors, however, offer interesting features for both fields in future applications. The state of development of hybrid and monolithic pixel detectors, excluding CCDs, and their different suitability for particle detection and imaging, is reviewed.

  9. Pixel Detectors for Particle Detection and Imaging Applications

    E-print Network

    Wermes, N

    2003-01-01

    Semiconductor pixel detectors offer features for the detection of radiation which are interesting for particle physics detectors as well as for imaging e.g. in biomedical applications (radiography, autoradiography, protein crystallography) or in Xray astronomy. At the present time hybrid pixel detectors are technologically mastered to a large extent and large scale particle detectors are being built. Although the physical requirements are often quite different, imaging applications are emerging and interesting prototype results are available. Monolithic detectors, however, offer interesting features for both fields in future applications. The state of development of hybrid and monolithic pixel detectors, excluding CCDs, and their different suitability for particle detection and imaging, is reviewed.

  10. Pixel Detectors for Particle Physics and Imaging Applications

    E-print Network

    Wermes, N

    2003-01-01

    Semiconductor pixel detectors offer features for the detection of radiation which are interesting for particle physics detectors as well as for imaging e.g. in biomedical applications (radiography, autoradiography, protein crystallography) or in Xray astronomy. At the present time hybrid pixel detectors are technologically mastered to a large extent and large scale particle detectors are being built. Although the physical requirements are often quite different, imaging applications are emerging and interesting prototype results are available. Monolithic detectors, however, offer interesting features for both fields in future applications. The state of development of hybrid and monolithic pixel detectors, excluding CCDs, and their different suitability for particle detection and imaging, is reviewed.

  11. Applications of imaging radar to geology

    NASA Astrophysics Data System (ADS)

    Daily, M. I.

    Tone, texture, and features imaged by radars were studied. A variety of computer image processing techniques were developed to reveal characteristics of these scences. Field checking of sites suggests links between the geology and the images. Tonal studies examine the effects of varying frequency polarization, and illumination geometry. Most surficial geologic units in Death Valley, California, are distinguishable by use of multifrequency, multipolarization radar data. Quaternary basalt flows in Idaho are separable by changing illumination geometry in the vertical plane, whereas desert fans and dunes show little tonal variation as function of changing illumination aximuth. Topographic texture is strongly enhanced by radar's unusual imaging physics computer image processing techniques prove useful in classifying and enhancing image texture. The classification technique, yield results in good agreement with those of human interpreters. The enhancement technique resolves a plunging anticline that was not evident on unprocessed imagery. Identification of features such as lineaments and large topographic highs is critically dependent on radar system parameters. A mathematical model of topography-induced distortion provides insight into the relationship between a radar image and the illuminated terrain. Imaging radar is shown to be a useful sensor for geologic mapping, especially when complementary data are present. Careful image processing, field checking of interpretations, and an understanding of radar imaging physics are critical to effective utilization of this unusual sensor.

  12. High-resolution crosswell imaging of a west Texas carbonate reservoir. Part 4: Reflection imaging

    Microsoft Academic Search

    Spyros K. Lazaratos; Jerry M. Harris; M. Van Schaack; J. W. Rector

    1995-01-01

    Reliable crosswell reflection imaging is a challenging task, even after the data have been wavefield-separated in the time domain. Residual, strong coherent noise is still present in the data. Stacking is complicated by the wide range of reflection incidence angles available for imaging. With wavelengths of a few feet, small misalignments as a result of velocity or geometric errors produce

  13. New amorphous-silicon image sensor for x-ray diagnostic medical imaging applications

    NASA Astrophysics Data System (ADS)

    Weisfield, Richard L.; Hartney, Mark A.; Street, Robert A.; Apte, Raj B.

    1998-07-01

    This paper introduces new high-resolution amorphous Silicon (a-Si) image sensors specifically configured for demonstrating film-quality medical x-ray imaging capabilities. The devices utilizes an x-ray phosphor screen coupled to an array of a-Si photodiodes for detecting visible light, and a-Si thin-film transistors (TFTs) for connecting the photodiodes to external readout electronics. We have developed imagers based on a pixel size of 127 micrometer X 127 micrometer with an approximately page-size imaging area of 244 mm X 195 mm, and array size of 1,536 data lines by 1,920 gate lines, for a total of 2.95 million pixels. More recently, we have developed a much larger imager based on the same pixel pattern, which covers an area of approximately 406 mm X 293 mm, with 2,304 data lines by 3,200 gate lines, for a total of nearly 7.4 million pixels. This is very likely to be the largest image sensor array and highest pixel count detector fabricated on a single substrate. Both imagers connect to a standard PC and are capable of taking an image in a few seconds. Through design rule optimization we have achieved a light sensitive area of 57% and optimized quantum efficiency for x-ray phosphor output in the green part of the spectrum, yielding an average quantum efficiency between 500 and 600 nm of approximately 70%. At the same time, we have managed to reduce extraneous leakage currents on these devices to a few fA per pixel, which allows for very high dynamic range to be achieved. We have characterized leakage currents as a function of photodiode bias, time and temperature to demonstrate high stability over these large sized arrays. At the electronics level, we have adopted a new generation of low noise, charge- sensitive amplifiers coupled to 12-bit A/D converters. Considerable attention was given to reducing electronic noise in order to demonstrate a large dynamic range (over 4,000:1) for medical imaging applications. Through a combination of low data lines capacitance, readout amplifier design, optimized timing, and noise cancellation techniques, we achieve 1,000e to 2,000e of noise for the page size and large size arrays, respectively. This allows for true 12-bit performance and quantum limited images over a wide range of x-ray exposures. Various approaches to reducing line correlated noise have been implemented and will be discussed. Images documenting the improved performance will be presented. Avenues for improvement are under development, including higher resolution 97 micrometer pixel imagers, further improvements in detective quantum efficiency, and characterization of dynamic behavior.

  14. Laser applications and system considerations in ocular imaging

    PubMed Central

    Elsner, Ann E.; Muller, Matthew S.

    2009-01-01

    We review laser applications for primarily in vivo ocular imaging techniques, describing their constraints based on biological tissue properties, safety, and the performance of the imaging system. We discuss the need for cost effective sources with practical wavelength tuning capabilities for spectral studies. Techniques to probe the pathological changes of layers beneath the highly scattering retina and diagnose the onset of various eye diseases are described. The recent development of several optical coherence tomography based systems for functional ocular imaging is reviewed, as well as linear and nonlinear ocular imaging techniques performed with ultrafast lasers, emphasizing recent source developments and methods to enhance imaging contrast. PMID:21052482

  15. In vivo Coherent Raman Imaging for Neuroscience Applications

    NASA Astrophysics Data System (ADS)

    Cote, Daniel

    2010-08-01

    The use of coherent Raman imaging is described for applications in neuroscience. Myelin imaging of the spinal cord can be performed with Raman imaging through the use of the vibration in carbon-hydrogen bonds, dominant in lipids. First, we demonstrate in vivo histomorphometry in live animal for characterization of myelin-related nervous system pathologies. This is used to characterize spinal cord health during multiple sclerosis. Second, Raman spectroscopy of tissue is discussed. We discuss the challenges that live animal imaging brings, together with important aspects of coherent Raman imaging in tissue.

  16. Digital holographic imaging for underwater acoustic applications

    Microsoft Academic Search

    G. A. Shippey; R. McHugh; J. G. Paul

    1992-01-01

    The technique described in this paper is primarily designed for underwater acoustic imaging. Incident wavefronts at an array aperture are sampled in space and time, then stored in a space-time memory, and used to reconstruct a 2D image fro a 1D array. It could similarly be used to reconstruct a 3D image from a 2D array. The technique is most

  17. Mesoscopics of ultrasound and seismic waves: application to passive imaging

    NASA Astrophysics Data System (ADS)

    Larose, É.

    2006-05-01

    This manuscript deals with different aspects of the propagation of acoustic and seismic waves in heterogeneous media, both simply and multiply scattering ones. After a short introduction on conventional imaging techniques, we describe two observations that demonstrate the presence of multiple scattering in seismic records: the equipartition principle, and the coherent backscattering effect (Chap. 2). Multiple scattering is related to the mesoscopic nature of seismic and acoustic waves, and is a strong limitation for conventional techniques like medical or seismic imaging. In the following part of the manuscript (Chaps. 3 5), we present an application of mesoscopic physics to acoustic and seismic waves: the principle of passive imaging. By correlating records of ambient noise or diffuse waves obtained at two passive sensors, it is possible to reconstruct the impulse response of the medium as if a source was placed at one sensor. This provides the opportunity of doing acoustics and seismology without a source. Several aspects of this technique are presented here, starting with theoretical considerations and numerical simulations (Chaps. 3, 4). Then we present experimental applications (Chap. 5) to ultrasound (passive tomography of a layered medium) and to seismic waves (passive imaging of California, and the Moon, with micro-seismic noise). Physique mésoscopique des ultrasons et des ondes sismiques : application à l'imagerie passive. Cet article de revue rassemble plusieurs aspects fondamentaux et appliqués de la propagation des ondes acoustiques et élastiques dans les milieux hétérogènes, en régime de diffusion simple ou multiple. Après une introduction sur les techniques conventionelles d'imagerie sismique et ultrasonore, nous présentons deux expériences qui mettent en évidence la présence de diffusion multiple dans les enregistrements sismologiques : l'équipartition des ondes, et la rétrodiffusion cohérente (Chap. 2). La diffusion multiple des ondes, qui démontre l'aspect mésoscopique de leur propagation, est une limitation majeure pour les techniques d'imagerie conventionelles (imagerie médicale, sismique réflexion ou réfraction, tomographie...). La deuxième partie du document (Chaps. 3 5) est consacrée à une application de cette physique mésoscopique : le principe de l'imagerie passive. En effectuant la corrélation temporelle d'enregistrement de bruit ambiant ou d'ondes diffuses, il est possible de reconstruire la réponse impulsionnelle du milieu entre deux capteurs passifs comme si l'on avait placé une source en lieu et place d'un des capteurs. Cela offre la possibilité de faire de l'acoustique ou de la sismologie sans source. Plusieurs aspects sont présentés dans ce manuscrit : des aspects théoriques et numériques (Chaps. 3, 4), ensuite des aspects expérimentaux avec des applications (Chap. 5) à l'échelle des ultrasons (tomographie passive d'un milieu stratifié), et des applications à l'échelle de la sismologie (imagerie du sous-sol de la Californie, et même de la Lune).

  18. 25 CFR Appendix A to Part 276 - Principles for Determining Costs Applicable to Grants

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Principles for Determining Costs Applicable to Grants A Appendix A to Part 276 Indians...UNIFORM ADMINISTRATIVE REQUIREMENTS FOR GRANTS Pt. 276, App. A Appendix A to Part...Principles for Determining Costs Applicable to Grants part i—general A. Purpose and...

  19. 25 CFR Appendix A to Part 276 - Principles for Determining Costs Applicable to Grants

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Principles for Determining Costs Applicable to Grants A Appendix A to Part 276 Indians...UNIFORM ADMINISTRATIVE REQUIREMENTS FOR GRANTS Pt. 276, App. A Appendix A to Part...Principles for Determining Costs Applicable to Grants part i—general A. Purpose and...

  20. 25 CFR Appendix A to Part 276 - Principles for Determining Costs Applicable to Grants

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Principles for Determining Costs Applicable to Grants A Appendix A to Part 276 Indians...UNIFORM ADMINISTRATIVE REQUIREMENTS FOR GRANTS Pt. 276, App. A Appendix A to Part...Principles for Determining Costs Applicable to Grants part i—general A. Purpose and...

  1. 34 CFR 8.1 - What is the scope and applicability of this part?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...What is the scope and applicability of this part? 8.1 Section 8.1 Education...is the scope and applicability of this part? (a) Except as provided in paragraph (c) of this section, this part establishes the procedures to be...

  2. Parts Application Analysis S-Band Transmitter P'AGI 1

    E-print Network

    Rathbun, Julie A.

    NO. ATM 841 Parts Application Analysis S-Band Transmitter P'AGI 1 !' ~,, 1 . 1969 The purpose of this ATM is to document the Parts Application Analysis (PAA} for the S-Band transmitter designed established by this analysis that all electrical and electronic parts used in the transmitter are being

  3. 19 CFR 201.1 - Applicability of part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Section 201.1 Customs Duties UNITED STATES INTERNATIONAL TRADE COMMISSION GENERAL RULES OF GENERAL APPLICATION § 201...application and a rule of special application, the latter is controlling. [68 FR 32973, June 3,...

  4. Magnetic resonance imaging: present and future applications

    PubMed Central

    Johnston, Donald L.; Liu, Peter; Wismer, Gary L.; Rosen, Bruce R.; Stark, David D.; New, Paul F.J.; Okada, Robert D.; Brady, Thomas J.

    1985-01-01

    Magnetic resonance (MR) imaging has created considerable excitement in the medical community, largely because of its great potential to diagnose and characterize many different disease processes. However, it is becoming increasingly evident that, because MR imaging is similar to computed tomography (CT) scanning in identifying structural disorders and because it is more costly and difficult to use, this highly useful technique must be judged against CT before it can become an accepted investigative tool. At present MR imaging has demonstrated diagnostic superiority over CT in a limited number of important, mostly neurologic, disorders and is complementary to CT in the diagnosis of certain other disorders. For most of the remaining organ systems its usefulness is not clear, but the lack of ionizing radiation and MR's ability to produce images in any tomographic plane may eventually prove to be advantageous. The potential of MR imaging to display in-vivo spectra, multinuclear images and blood-flow data makes it an exciting investigative technique. At present, however, MR imaging units should be installed only in medical centres equipped with the clinical and basic research facilities that are essential to evaluate the ultimate role of this technique in the care of patients. ImagesFig. 5Fig. 6Fig. 7Fig. 8Fig. 9Fig. 10Fig. 11Fig. 12Fig. 13Fig. 14 PMID:3884120

  5. Application of coherent 10 micron imaging lidar

    SciTech Connect

    Simpson, M.L.; Hutchinson, D.P.; Richards, R.K.; Bennett, C.A.

    1997-04-01

    With the continuing progress in mid-IR array detector technology and high bandwidth fan-outs, i.f. electronics, high speed digitizers, and processing capability, true coherent imaging lidar is becoming a reality. In this paper experimental results are described using a 10 micron coherent imaging lidar.

  6. Imaging prostate cancer: current and future applications.

    PubMed

    el-Gabry, E A; Halpern, E J; Strup, S E; Gomella, L G

    2001-03-01

    Various treatment options are available for adenocarcinoma of the prostate--the most common malignant neoplasm among men in the United States. To select an optimum management strategy, we must be able to identify an organ-confined disease (in which local therapy such as surgery or radiation may be beneficial) vs prostate cancer beyond the confines of the gland (for which other treatment approaches may be more appropriate). At present, no standard imaging modality can by itself reliably diagnose and/or stage adenocarcinoma of the prostate. Standard transrectal ultrasound, magnetic resonance imaging (MRI), computed tomography, bone scans, and plain x-ray are not sufficiently reliable when used alone. Fortunately, advances in imaging technology have led to the development of several promising modalities. These modalities include color and power Doppler ultrasonography, ultrasound contrast agents, intermittent and harmonic ultrasound imaging, MR contrast imaging, MRI with fat suppression, MRI spectroscopy, three-dimensional MRI spectroscopy, elastography, and radioimmunoscintigraphy. These newer imaging techniques appear to improve the yield of prostate cancer detection and staging, but are limited in availability and thus require further validation. This article reviews the status of current imaging modalities for prostate cancer and identifies emerging imaging technologies that may improve the diagnosis and staging of this disease. PMID:11301831

  7. Some applications of the imaging proportional chamber

    SciTech Connect

    Charpak, G.; Dominik, W.; Fabre, J.P.; Gaudaen, J.; Peskov, V.; Sauli, F.; Suzuki, M.; Breskin, A.; Chechik, R.; Sauvage, D.

    1988-02-01

    Photons emitted by avalanches in gases can be detected with an image intensifier coupled to a solid state camera. Some vapors enhance the emission at wavelengths close to the visible. The authors describe progress made in the imaging of charged particles and of Cherenkov photons.

  8. Nuclear cardiac imaging: Principles and applications

    SciTech Connect

    Iskandrian, A.S.

    1986-01-01

    This book provides an analysis of the pathophysiologic concepts and effectiveness of the commonly available cardiac imaging modalities: thallium-201 scintigraphy, myocardial infarct avid-imaging, and radionuclide ventriculography. Emphasis is on the implications of these diagnostic procedures. Organizing an efficient laboratory, instrumentation, radiopharmaceuticals, and exercise testing are discussed.

  9. Application of Optical Imaging and Spectroscopy to Radiation Biology

    PubMed Central

    Palmer, Gregory M.; Vishwanath, Karthik; Dewhirst, Mark W.

    2013-01-01

    Optical imaging and spectroscopy is a diverse field that has been of critical importance in a wide range of areas in radiation research. It is capable of spanning a wide range of spatial and temporal scales, and has the sensitivity and specificity needed for molecular and functional imaging. This review will describe the basic principles of optical imaging and spectroscopy, highlighting a few relevant applications to radiation research. PMID:22360397

  10. Optimizing signal and image processing applications using Intel libraries

    NASA Astrophysics Data System (ADS)

    Landré, Jérôme; Truchetet, Frédéric

    2007-01-01

    This paper presents optimized signal and image processing libraries from Intel Corporation. Intel Performance Primitives (IPP) is a low-level signal and image processing library developed by Intel Corporation to optimize code on Intel processors. Open Computer Vision library (OpenCV) is a high-level library dedicated to computer vision tasks. This article describes the use of both libraries to build flexible and efficient signal and image processing applications.

  11. Adaptive Denoising Filter Algorithm for CMOS Image Sensor Testing Applications

    Microsoft Academic Search

    Chun-Lung Hsu; Chen-Wei Lan; Yu-Chih Lo; Yu-Sheng Huang

    2010-01-01

    This paper proposes an adaptive de-nosing filter (ADF) algorithm to effectively remove the image defects for the CMOS image sensor testing applications. Based on the median filter technique, the proposed ADF algorithm develops a pre-processing method to generate adaptive detection windows for pixel defect de-noising of an image. Experimental results and comparisons show that the proposed ADF algorithm can provide

  12. Application Oriented Brokering in Medical Imaging: Algorithms and Software Architecture

    Microsoft Academic Search

    Mario R. Guarracino; Giuliano Laccetti; Almerico Murli

    2005-01-01

    \\u000a This paper describes algorithms and software architecture of a resource broker designed in the context of MedIGrid, a medical\\u000a imaging application for the management, visualization and reconstruction on grids of medical images produced by PET\\/SPECT\\u000a medical instruments. The broker allows the discovery and selection of suitable clusters of workstations for the execution\\u000a of parallel image reconstruction algorithms. The proposed algorithms

  13. Resolution-Invariant Image Representation and its applications

    Microsoft Academic Search

    Jinjun Wang; Shenghuo Zhu; Yihong Gong

    2009-01-01

    We present a resolution-invariant image representation (RIIR) framework in this paper. The RIIR framework includes the methods of building a set of multi-resolution bases from training images, estimating the optimal sparse resolution-invariant representation of any image, and reconstructing the missing patches of any resolution level. As the proposed RIIR framework has many potential resolution enhancement applications, we discuss three novel

  14. Advanced multifunctional detectors for laser-gated imaging applications

    Microsoft Academic Search

    Ian Baker; Peter Thorne; James Henderson; Jeremy Copley; David Humphreys; Alasdair Millar

    2006-01-01

    The rapid pace of development in the field of long-range imaging is illustrated by two new detector technologies for passive and active imaging. Active systems, using a near-infrared pulse laser and a fast, gated detector, are now adopted for most long range imaging applications. This concept is often called burst-illumination LIDAR or BIL. The SELEX solid state detector is based

  15. IGSTK: a software toolkit for image-guided surgery applications

    Microsoft Academic Search

    Kevin Cleary; Luis Ibáñez; Sohan Ranjan; M. Brian Blake

    2004-01-01

    The Image-Guided Software Toolkit (IGSTK: pronounced IGstick) is a high-level open- source component based software toolkit. The toolkit is currently under development and is intended to make it easy for researchers to prototype and develop image-guided surgery applications. The toolkit has been used to develop an example application incorporating electromagnetic tracking of a surgical needle. This paper presents the development

  16. Discrete Pulse Transform of images: Algorithm and applications

    Microsoft Academic Search

    Bobby Anguelov

    2008-01-01

    The Discrete Pulse Transform (DPT), a well known method for the analysis of signals, was recently extended to images. Here we propose an efficient algorithm generating DPT on a given image and discuss some applications. These include detecting objects of interest in a scene and identifying textures by granulometric curves.

  17. Stochastic Circuits for Real-Time Image-Processing Applications

    E-print Network

    Hayes, John P.

    . This work addresses the design of image- processing circuits using stochastic computing techniques. We show efficient real-time (pre)processing of images. We present the design of several representative circuits Structures, B.6 Logic Design, C.3 Special-Purpose and Application-Based Systems. General Terms Design

  18. A Java Library of GUI Components for Image Processing Applications

    E-print Network

    Seinstra, Frank J.

    A Java Library of GUI Components for Image Processing Applications Frank Seinstra and Dennis Koelma access to the image processing routines that are available. The Java programming language [1. Moreover, by way of Java applets demonstration on the Internet of speci#12;c research topics is possible

  19. Applications ofWavelets in Digital Image Watermarking

    E-print Network

    Namuduri, Kamesh

    Applications ofWavelets in Digital Image Watermarking VYAGHRESWARA RAO NAMUDURI, S.N. NARAHARI PANDIT, KALYAN KOTHINTI AND KAMESH NAMUDURI Abstract Watermark is a digital signal or pattern inserted. This paper discusses the concept of multi channel digital image watermarking. It discusses how transforms

  20. NANO REVIEW Nanoparticles for Applications in Cellular Imaging

    E-print Network

    Brown, Eric

    NANO REVIEW Nanoparticles for Applications in Cellular Imaging K. Ted Thurn Æ Eric M. B. Brown Æ several types of nanoparticles (such as TiO2, quantum dots, and gold nanoparticles) and their impact nanoparticle imaging and uptake in live cells in vitro. Due to their unique size-dependent properties

  1. An airborne four-camera imaging system for agricultural applications

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This paper describes the design and testing of an airborne multispectral digital imaging system for remote sensing applications. The system consists of four high resolution charge coupled device (CCD) digital cameras and a ruggedized PC equipped with a frame grabber and image acquisition software. T...

  2. Providing image management and communication functionality as an integral part of an existing hospital information system

    NASA Astrophysics Data System (ADS)

    Dayhoff, Ruth E.; Maloney, Daniel L.

    1990-08-01

    The effective delivery of health care has become increasingly dependent on a wide range of medical data which includes a variety of images. Manual and computer-based medical records ordinarily do not contain image data, leaving the physician to deal with a fragmented patient record widely scattered throughout the hospital. The Department of Veterans Affairs (VA) is currently installing a prototype hospital information system (HIS) workstation network to demonstrate the feasibility of providing image management and communications (IMAC) functionality as an integral part of an existing hospital information system. The core of this system is a database management system adapted to handle images as a new data type. A general model for this integration is discussed and specifics of the hospital-wide network of image display workstations are given.

  3. 24 CFR 880.104 - Applicability of part 880.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    (a) Part 880, in effect as of November 5, 1979, applies to all proposals for which a notification of selection was not issued before the November 5, 1979 effective date of part 880. (See 24 CFR part 880, revised as of April 1,...

  4. Applications of computer modeling to engineer better part quality

    SciTech Connect

    Bernhardt, E.C.; Bernhardt, M.R.

    1989-01-01

    Modern computer modeling tools can help define the best way to produce quality injection molded parts. They provide a way to quickly evaluate different processing options, taking into consideration part geometry, resin characteristics, process variability and plant economics. They are tools for optimizing the technical and economic aspects of producing consistent quality parts. The uses of computer models are discussed here.

  5. Application of ASAP in integral imaging

    NASA Astrophysics Data System (ADS)

    Wang, Hong-xia; Xu, Zhi-li; Wen, Shao-jie; Wu, Chun-hong

    2012-10-01

    Integral imaging (II) is a technique that is capable of displaying 3D images with continuous parallax in full natural color. At present Integral Imaging is a popular three-dimensional imaging technology. It is becoming the most perspective technique in developing next generation three-dimensional TV (3DTV) and visualization field due to its outstanding advantages. The micro-lens array is used in recording and replaying 3D scene information in this technique with true color, simply reconstruction and non-relevant light source. In order to research really many precision instrument are required. But the price is too high to set up a complicated authentic imaging system. In the same time the imaging condition is very difficult to satisfy. ASAP (Advanced System Analysis Program) is an advanced imitates optical software to solve reality optical questions. It is used in many research territories. In this paper the ASAP software is proposed to simulate and model the micro-lens array sheet. The ray tracing and energy distribution is completed. According to the study results we can optimum lens designing through modifying the focal length, aperture size and imaging position. We hope the study cost can be reduced and the efficiency can be improved through the use of simulation method to optical design software ASAP.

  6. 40 CFR Table 4 to Subpart H of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Part 63 General Provisions 4 Table 4 to Subpart H of Part 63 Protection of Environment ENVIRONMENTAL...Air Pollutants for Equipment Leaks Pt. 63, Subpt H, Table 4 Table 4 to Subpart H of Part 63—Applicable 40 CFR Part 63 General...

  7. 40 CFR Table 4 to Subpart H of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Part 63 General Provisions 4 Table 4 to Subpart H of Part 63 Protection of Environment ENVIRONMENTAL...Air Pollutants for Equipment Leaks Pt. 63, Subpt H, Table 4 Table 4 to Subpart H of Part 63—Applicable 40 CFR Part 63 General...

  8. 40 CFR Table 4 to Subpart H of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Part 63 General Provisions 4 Table 4 to Subpart H of Part 63 Protection of Environment ENVIRONMENTAL...Air Pollutants for Equipment Leaks Pt. 63, Subpt H, Table 4 Table 4 to Subpart H of Part 63—Applicable 40 CFR Part 63 General...

  9. 40 CFR Table 4 to Subpart H of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Part 63 General Provisions 4 Table 4 to Subpart H of Part 63 Protection of Environment ENVIRONMENTAL...Air Pollutants for Equipment Leaks Pt. 63, Subpt H, Table 4 Table 4 to Subpart H of Part 63—Applicable 40 CFR Part 63 General...

  10. 40 CFR Table 1a to Subpart G of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Part 63 General Provisions 1A Table 1A to Subpart G of Part 63 Protection of Environment ENVIRONMENTAL...Transfer Operations, and Wastewater Pt. 63, Subpt. G, Table 1A Table 1A to Subpart G of Part 63—Applicable 40 CFR Part 63 General...

  11. 40 CFR Table 1a to Subpart G of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Part 63 General Provisions 1A Table 1A to Subpart G of Part 63 Protection of Environment ENVIRONMENTAL...Transfer Operations, and Wastewater Pt. 63, Subpt. G, Table 1A Table 1A to Subpart G of Part 63—Applicable 40 CFR Part 63 General...

  12. 40 CFR Table 1a to Subpart G of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Part 63 General Provisions 1A Table 1A to Subpart G of Part 63 Protection of Environment ENVIRONMENTAL...Transfer Operations, and Wastewater Pt. 63, Subpt. G, Table 1A Table 1A to Subpart G of Part 63—Applicable 40 CFR Part 63 General...

  13. 40 CFR Table 1a to Subpart G of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Part 63 General Provisions 1A Table 1A to Subpart G of Part 63 Protection of Environment ENVIRONMENTAL...Transfer Operations, and Wastewater Pt. 63, Subpt. G, Table 1A Table 1A to Subpart G of Part 63—Applicable 40 CFR Part 63 General...

  14. Hyperpolarized Gas MR Imaging: Technique and Applications.

    PubMed

    Roos, Justus E; McAdams, Holman P; Kaushik, S Sivaram; Driehuys, Bastiaan

    2015-05-01

    Functional imaging offers information more sensitive to changes in lung structure and function. Hyperpolarized helium ((3)He) and xenon ((129)Xe) MR imaging of the lungs provides sensitive contrast mechanisms to probe changes in pulmonary ventilation, microstructure, and gas exchange. Gas imaging has shifted to the use of (129)Xe. Xenon is well-tolerated. (129)Xe is soluble in pulmonary tissue, which allows exploring specific lung function characteristics involved in gas exchange and alveolar oxygenation. Hyperpolarized gases and (129)Xe in particular stand to be an excellent probe of pulmonary structure and function, and provide sensitive and noninvasive biomarkers for pulmonary diseases. PMID:25952516

  15. Application of contourlet transform in infrared image denoising

    NASA Astrophysics Data System (ADS)

    Lin, Yuchi; Zhou, Xin; Song, Le; Huang, Yinguo

    2008-03-01

    Wavelet threshold denoising is widely used in the denoising of the infrared image for its simplicity and effectiveness in application. However, there has been a growing awareness to the observation that wavelets may not be the best choice for describing infrared images. This observation is due to the fact that wavelets are blind to the smoothness along the edges commonly found in images. A denoising method of infrared image based on Contourlet transform is presented in this paper. In selecting the hard threshold function to process the coefficients in the Contourlet domain, we could thereby obtain the denoised infrared image of superior quality via inverse transforming. The result of the experiment indicates that compared with the traditional algorithms of the wavelet, this method can preserve the detail and the texture of the infrared image more effectively, and has better image effect and the SNR value.

  16. 5 CFR 8.4 - Positions excepted from the application of this part.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...OVERSEAS POSITIONS (RULE VIII) § 8.4 Positions excepted from the application of this part. This part shall not apply to positions in Hawaii, Puerto Rico, the Virgin Islands, and Alaska, and on the Isthmus of...

  17. 7 CFR 4290.1940 - Integration of this part with other regulations applicable to USDA's programs.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Secretary has not delegated this responsibility to SBA pursuant to § 4290.45 of this part. (c) Clean Air Act and Water Pollution Control Act requirements. To the extent applicable to this part, the Secretary will comply with the...

  18. 49 CFR 397.1 - Application of the rules in this part.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES General § 397.1 Application of the rules in this part. (a) The rules in this part apply to each...

  19. 49 CFR 397.1 - Application of the rules in this part.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES General § 397.1 Application of the rules in this part. (a) The rules in this part apply to each...

  20. 49 CFR 397.1 - Application of the rules in this part.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES General § 397.1 Application of the rules in this part. (a) The rules in this part apply to each...

  1. 49 CFR 397.1 - Application of the rules in this part.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES General § 397.1 Application of the rules in this part. (a) The rules in this part apply to each...

  2. Cylindrical millimeter-wave imaging technique and applications

    NASA Astrophysics Data System (ADS)

    Sheen, David M.; McMakin, Douglas L.; Hall, Thomas E.

    2006-05-01

    The wideband microwave or millimeter-wave cylindrical imaging technique has been developed at Pacific Northwest National Laboratory (PNNL) for several applications including concealed weapon detection and automated body measurement for apparel fitting. This technique forms a fully-focused, diffraction-limited, three-dimensional image of the person or imaging target by scanning an inward-directed vertical array around the person or imaging target. The array is switched electronically to sequence across the array at high-speed, so that a full 360 degree mechanical scan over the cylindrical aperture can occur in 2-10 seconds. Wideband, coherent reflection data from each antenna position are recorded in a computer and subsequently reconstructed using an FFT-based image reconstruction algorithm developed at PNNL. The cylindrical scanning configuration is designed to optimize the illumination of the target and minimize non-returns due to specular reflection of the illumination away from the array. In this paper, simulated modeling data are used to explore imaging issues that affect the cylindrical imaging technique. Physical optics scattering simulations are used to model realistic returns from curved surfaces to determine the extent to which specular reflection affects the signal return and subsequent image reconstruction from these surfaces. This is a particularly important issue for the body measurement application. Also, an artifact in the imaging technique, referred to as "circular convolution aliasing" is discussed including methods to reduce or eliminate it. Numerous simulated and laboratory measured imaging results are presented.

  3. Imaging radar techniques for remote sensing applications.

    NASA Technical Reports Server (NTRS)

    Zelenka, J. S.

    1972-01-01

    The basic concepts of fine-resolution, imaging radar systems are reviewed. Both side-looking and hologram (downward-looking) radars are described and compared. Several examples of microwave imagery obtained with these two types of systems are shown.

  4. Sono-photoacoustic imaging of gold nanoemulsions: Part II. Real time imaging

    PubMed Central

    Arnal, Bastien; Wei, Chen-Wei; Perez, Camilo; Nguyen, Thu-Mai; Lombardo, Michael; Pelivanov, Ivan; Pozzo, Lilo D.; O’Donnell, Matthew

    2015-01-01

    Photoacoustic (PA) imaging using exogenous agents can be limited by degraded specificity due to strong background signals. This paper introduces a technique called sono-photoacoustics (SPA) applied to perfluorohexane nanodroplets coated with gold nanospheres. Pulsed laser and ultrasound (US) excitations are applied simultaneously to the contrast agent to induce a phase-transition ultimately creating a transient microbubble. The US field present during the phase transition combined with the large thermal expansion of the bubble leads to 20–30 dB signal enhancement. Aqueous solutions and phantoms with very low concentrations of this agent were probed using pulsed laser radiation at diagnostic exposures and a conventional US array used both for excitation and imaging. Contrast specificity of the agent was demonstrated with a coherent differential scheme to suppress US and linear PA background signals. SPA shows great potential for molecular imaging with ultrasensitive detection of targeted gold coated nanoemulsions and cavitation-assisted theranostic approaches. PMID:25893170

  5. Sono-photoacoustic imaging of gold nanoemulsions: Part II. Real time imaging.

    PubMed

    Arnal, Bastien; Wei, Chen-Wei; Perez, Camilo; Nguyen, Thu-Mai; Lombardo, Michael; Pelivanov, Ivan; Pozzo, Lilo D; O'Donnell, Matthew

    2015-03-01

    Photoacoustic (PA) imaging using exogenous agents can be limited by degraded specificity due to strong background signals. This paper introduces a technique called sono-photoacoustics (SPA) applied to perfluorohexane nanodroplets coated with gold nanospheres. Pulsed laser and ultrasound (US) excitations are applied simultaneously to the contrast agent to induce a phase-transition ultimately creating a transient microbubble. The US field present during the phase transition combined with the large thermal expansion of the bubble leads to 20-30 dB signal enhancement. Aqueous solutions and phantoms with very low concentrations of this agent were probed using pulsed laser radiation at diagnostic exposures and a conventional US array used both for excitation and imaging. Contrast specificity of the agent was demonstrated with a coherent differential scheme to suppress US and linear PA background signals. SPA shows great potential for molecular imaging with ultrasensitive detection of targeted gold coated nanoemulsions and cavitation-assisted theranostic approaches. PMID:25893170

  6. Radiographic image processing for industrial applications

    NASA Astrophysics Data System (ADS)

    Dowling, Martin J.; Kinsella, Timothy E.; Bartels, Keith A.; Light, Glenn M.

    1998-03-01

    One advantage of working with digital images is the opportunity for enhancement. While it is important to preserve the original image, variations can be generated that yield greater understanding of object properties. It is often possible to effectively increase dynamic range, improve contrast in regions of interest, emphasize subtle features, reduce background noise, and provide more robust detection of faults. This paper describes and illustrates some of these processes using real world examples.

  7. Variational algorithms to remove stationary noise: applications to microscopy imaging.

    PubMed

    Fehrenbach, Jérôme; Weiss, Pierre; Lorenzo, Corinne

    2012-10-01

    A framework and an algorithm are presented in order to remove stationary noise from images. This algorithm is called variational stationary noise remover. It can be interpreted both as a restoration method in a Bayesian framework and as a cartoon+texture decomposition method. In numerous denoising applications, the white noise assumption fails. For example, structured patterns such as stripes appear in the images. The model described here addresses these cases. Applications are presented with images acquired using different modalities: scanning electron microscope, FIB-nanotomography, and an emerging fluorescence microscopy technique called selective plane illumination microscopy. PMID:22752131

  8. Using stereoscopic imaging for visualization applications

    SciTech Connect

    Adelson, S.J.

    1994-02-01

    The purpose of scientific visualization is to simplify the analysis of numerical data by rendering the information as an image. Even when the image is familiar, as in the case of terrain data, preconceptions about what the image should look like and deceptive image artifacts can create misconceptions about what information is actually contained in the scene. One way of aiding the development of unambiguous visualizations is to add stereoscopic depth to the image. Despite the recent proliferation of affordable stereoscopic viewing equipment, few researchers are at this time taking advantage of stereo in their visualizations. It is generally perceived that the rendering time will have to be doubled in order to generate the pair, and so stereoscopic viewing is sacrificed in the name of expedient rendering. We show that this perception is often invalid. The second half of a stereoscopic image can be generated from the first half for a fraction of the computational cost of complete rendering, usually no more than 50% of the cost and in many cases as little as 5%. Using the techniques presented here, the benefits of stereoscopy can be added to existing visualization systems for only a small cost over current single-frame rendering methods.

  9. Bistatic radar imaging of the marine environment. Part II: simulation and results analysis

    E-print Network

    Boyer, Edmond

    1 Bistatic radar imaging of the marine environment. Part II: simulation and results analysis present a bistatic, polarimetric and real aper- ture Marine Radar Simulator (MaRS) producing pseudo-raw radar signal. The simulation takes the main elements of the environment into account (sea temperature

  10. Image-Based Localization of Vehicle Parts Guided by Visual Attention

    E-print Network

    Payeur, Pierre

    Image-Based Localization of Vehicle Parts Guided by Visual Attention Ana-Maria Cretu and Pierre Payeur School of Electrical Engineering and Computer Science University of Ottawa Ottawa, Canada [acretu in today's world. While certain operations, such as car washing, require only a rough model of the surface

  11. Image Processing Based Method of Predicting Stiffness Characteristics of Short Fiber Reinforced Injection Molded Parts

    Microsoft Academic Search

    J. S. Sirkis; A. Cheng; A. Dasgupta; I. Pandelidis

    1994-01-01

    An automated method is presented for predicting the effective stiffness properties of injection molded parts reinforced with non-random distribution of short fibers. The methodology first employs image processing techniques to determine the probability distribution of fiber orientation (PDFO) and probability distribution of fiber length (PDFL), both of which considerably influence the anisotropy of the mechanical behavior of fibrous composites. Simple

  12. NMR imaging of components and materials for DOE application

    SciTech Connect

    Richardson, B.R.

    1993-12-01

    The suitability for using NMR imaging to characterize liquid, polymeric, and solid materials was reviewed. The most attractive applications for NMR imaging appear to be liquid-filled porous samples, partially cured polymers, adhesives, and potting compounds, and composite polymers/high explosives containing components with widely varying thermal properties. Solid-state NMR line-narrowing and signal-enhancing markedly improve the imaging possibilities of true solid and materials. These techniques provide unique elemental and chemical shift information for highly complex materials and complement images with similar spatial resolution, such as X-ray computed tomography (CT).

  13. Interferometric fiber optic sensors for biomedical applications of optoacoustic imaging.

    PubMed

    Lamela, Horacio; Gallego, Daniel; Gutierrez, Rebeca; Oraevsky, Alexander

    2011-03-01

    We present a non-metallic interferometric silica optical fiber ultrasonic wideband sensor for optoacoustic imaging applications. The ultrasonic sensitivity of this sensor has been characterized over the frequency range from 1 to 10 MHz. A comparative analysis has been carried out between this sensor and an array of piezoelectric transducers using optoacoustic signals generated from an optical absorbent embedded in a tissue mimicking phantom. Also, a two dimensional reconstructed image of the phantom using the fiber interferometric sensor is presented and compared to the image obtained using the Laser Optoacoustic Imaging System, LOIS-64B. The feasibility of our fiber optic based sensor for wideband ultrasonic detection is demonstrated. PMID:21246745

  14. Applications of magnetic resonance image segmentation in neurology

    NASA Astrophysics Data System (ADS)

    Heinonen, Tomi; Lahtinen, Antti J.; Dastidar, Prasun; Ryymin, Pertti; Laarne, Paeivi; Malmivuo, Jaakko; Laasonen, Erkki; Frey, Harry; Eskola, Hannu

    1999-05-01

    After the introduction of digital imagin devices in medicine computerized tissue recognition and classification have become important in research and clinical applications. Segmented data can be applied among numerous research fields including volumetric analysis of particular tissues and structures, construction of anatomical modes, 3D visualization, and multimodal visualization, hence making segmentation essential in modern image analysis. In this research project several PC based software were developed in order to segment medical images, to visualize raw and segmented images in 3D, and to produce EEG brain maps in which MR images and EEG signals were integrated. The software package was tested and validated in numerous clinical research projects in hospital environment.

  15. Handheld thermal imaging for law enforcement and counterdrug applications

    NASA Astrophysics Data System (ADS)

    Haran, Terence L.; Higgins, Melinda K.; Thomas, Michael L.

    2004-09-01

    Although the potential benefits of infrared imaging systems in law enforcement applications have been apparent for many years, budget and technology constraints have prevented their widespread deployment. Recent technology improvements and cost reductions, however, have made the routine use of handheld thermal imagers practical for the law enforcement community. This effort involved both an analysis of operational and technical requirements associated with law enforcement use as well as a comprehensive review of commercially available handheld infrared imaging systems. The use of handheld infrared systems in the counterdrug environment is also addressed, including the results of an analysis of proven applications, a review of training requirements, and a summary of legal issues associated with infrared surveillance. Results generated by the NVTHERM infrared sensor model are also shown for one handheld imager to provide representative information regarding low-cost thermal imager performance.

  16. Recent applications of thermal imagers for security assessment

    SciTech Connect

    Bisbee, T.L.

    1997-06-01

    This paper discusses recent applications by Sandia National Laboratories of cooled and uncooled thermal infrared imagers to wide-area security assessment systems. Thermal imagers can solve many security assessment problems associated with the protection of high-value assets at military bases, secure installations, and commercial facilities. Thermal imagers can provide surveillance video from security areas or perimeters both day and night without expensive security lighting. Until fairly recently, thermal imagers required open-loop cryogenic cooling to operate. The high cost of these systems and associated maintenance requirements restricted their widespread use. However, recent developments in reliable, closed-loop, linear drive cryogenic coolers and uncooled infrared imagers have dramatically reduced maintenance requirements, extended MTBF, and are leading to reduced system cost. These technology developments are resulting in greater availability and practicality for military as well as civilian security applications.

  17. 7 CFR 4290.20 - Legal basis and applicability of this part 4290.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... RURAL BUSINESS INVESTMENT COMPANY (âRBICâ) PROGRAM Introduction to Part 4290 § 4290.20 Legal basis and applicability...All RBICs must comply with all applicable regulations, accounting guidelines and valuation guidelines for...

  18. Third Conference on Artificial Intelligence for Space Applications, part 2

    NASA Technical Reports Server (NTRS)

    Denton, Judith S. (compiler); Freeman, Michael S. (compiler); Vereen, Mary (compiler)

    1988-01-01

    Topics relative to the application of artificial intelligence to space operations are discussed. New technologies for space station automation, design data capture, computer vision, neural nets, automatic programming, and real time applications are discussed.

  19. 47 CFR 20.2 - Other applicable rule parts.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMON CARRIER SERVICES COMMERCIAL MOBILE SERVICES § 20.2 Other applicable...applicable to licensees in the commercial mobile radio services include the following...standards and procedures concerning the marketing and importation of radio frequency...

  20. 47 CFR 20.2 - Other applicable rule parts.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMON CARRIER SERVICES COMMERCIAL MOBILE SERVICES § 20.2 Other applicable...applicable to licensees in the commercial mobile radio services include the following...standards and procedures concerning the marketing and importation of radio frequency...

  1. Strontium: Part II. Chemistry, Biological Aspects and Applications.

    ERIC Educational Resources Information Center

    Britton, G. C.; Johnson, C. H.

    1987-01-01

    Reviews basic information on the Chemistry of strontium and its compounds. Explains biological aspects of strontium and its pharmaceutical applications. Highlights industrial application of strontium and its components. (ML)

  2. Magnetic resonance imaging. Application to family practice.

    PubMed Central

    Goh, R. H.; Somers, S.; Jurriaans, E.; Yu, J.

    1999-01-01

    OBJECTIVE: To review indications, contraindications, and risks of using magnetic resonance imaging (MRI) in order to help primary care physicians refer patients appropriately for MRI, screen for contraindications to using MRI, and educate patients about MRI. QUALITY OF EVIDENCE: Recommendations are based on classic textbooks, the policies of our MRI group, and a literature search using MEDLINE with the MeSH headings magnetic resonance imaging, brain, musculoskeletal, and spine. The search was limited to human, English-language, and review articles. Evidence in favour of using MRI for imaging the head, spine, and joints is well established. For cardiac, abdominal, and pelvic conditions, MRI has been shown useful for certain indications, usually to complement other modalities. MAIN MESSAGE: For demonstrating soft tissue conditions, MRI is better than computed tomography (CT), but CT shows bone and acute bleeding better. Therefore, patients with trauma or suspected intracranial bleeding should have CT. Tumours, congenital abnormalities, vascular structures, and the cervical or thoracic spine show better on MRI. Either modality can be used for lower back pain. Cardiac, abdominal, and pelvic abnormalities should be imaged with ultrasound or CT before MRI. Contraindications for MRI are mainly metallic implants or shrapnel, severe claustrophobia, or obesity. CONCLUSIONS: With the increasing availability of MRI scanners in Canada, better understanding of the indications, contraindications, and risks will be helpful for family physicians and their patients. Images Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 PMID:10509224

  3. Selected Applications of Planar Imaging Velocimetry in Combustion Test Facilities

    NASA Astrophysics Data System (ADS)

    Willert, Christian; Stockhausen, Guido; Voges, Melanie; Klinner, Joachim; Schodl, Richard; Hassa, Christoph; Schürmans, Bruno; Güthe, Felix

    This chapter provides an overview on the application of particle image velocimetry (PIV) and Doppler global velocimetry (DGV) in combustion test facilities that are operated at pressures of up to 10 bar. Emphasis is placed on the experimental aspects of each application rather than the interpretation of the acquired flow-field data because many of the encountered problems and chosen solution strategies are unique to this area of velocimetry application. In particular, imaging configurations, seeding techniques, data-acquisition strategies as well as pre- and postprocessing methodologies are outlined.

  4. Image-Based Motion he use of image guidance in medical applications is

    E-print Network

    Hamarneh, Ghassan

    product ExAblate. It is the first and only FDA-approved medical device for using focused ultrasound under© EYEWIRE Image-Based Motion Detection T he use of image guidance in medical applications tissue movements during clinical procedures. Our method has been validated in more than 600 true clinical

  5. Mean–Standard Deviation Representation of Sonar Images for Echo Detection: Application to SAS Images

    Microsoft Academic Search

    Jocelyn Chanussot; Alain Hétet; Maud Amate

    2007-01-01

    This paper addresses the detection of underwater mines echoes with application to synthetic aperture sonar (SAS) imaging. A detection method based on local first- and second-order statistical properties of the sonar images is proposed. It consists of mapping the data onto the mean-standard deviation plane highlighting these properties. With this representation, an adaptive thresholding of the data enables the separation

  6. Anatomical noise in contrast-enhanced digital mammography. Part II. Dual-energy imaging

    SciTech Connect

    Hill, Melissa L.; Yaffe, Martin J. [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada and Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada)] [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada and Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Mainprize, James G. [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada)] [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Carton, Ann-Katherine; Saab-Puong, Sylvie; Iordache, R?zvan; Muller, Serge [GE Healthcare, 283 rue de la Minière, Buc 78530 (France)] [GE Healthcare, 283 rue de la Minière, Buc 78530 (France); Jong, Roberta A. [Breast Imaging, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada)] [Breast Imaging, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Dromain, Clarisse [Department of Radiology, Institut Gustave Roussy, 39 rue Camille Desmoulin, Villejuif 94805 (France)] [Department of Radiology, Institut Gustave Roussy, 39 rue Camille Desmoulin, Villejuif 94805 (France)

    2013-08-15

    Purpose: Dual-energy (DE) contrast-enhanced digital mammography (CEDM) uses an iodinated contrast agent in combination with digital mammography (DM) to evaluate lesions on the basis of tumor angiogenesis. In DE imaging, low-energy (LE) and high-energy (HE) images are acquired after contrast administration and their logarithms are subtracted to cancel the appearance of normal breast tissue. Often there is incomplete signal cancellation in the subtracted images, creating a background “clutter” that can impair lesion detection. This is the second component of a two-part report on anatomical noise in CEDM. In Part I the authors characterized the anatomical noise for single-energy (SE) temporal subtraction CEDM by a power law, with model parameters ? and ?. In this work the authors quantify the anatomical noise in DE CEDM clinical images and compare this with the noise in SE CEDM. The influence on the anatomical noise of the presence of iodine in the breast, the timing of imaging postcontrast administration, and the x-ray energy used for acquisition are each evaluated.Methods: The power law parameters, ? and ?, were measured from unprocessed LE and HE images and from DE subtracted images to quantify the anatomical noise. A total of 98 DE CEDM cases acquired in a previous clinical pilot study were assessed. Conventional DM images from 75 of the women were evaluated for comparison with DE CEDM. The influence of the imaging technique on anatomical noise was determined from an analysis of differences between the power law parameters as measured in DM, LE, HE, and DE subtracted images for each subject.Results: In DE CEDM, weighted image subtraction lowers ? to about 1.1 from 3.2 and 3.1 in LE and HE unprocessed images, respectively. The presence of iodine has a small but significant effect in LE images, reducing ? by about 0.07 compared to DM, with ? unchanged. Increasing the x-ray energy, from that typical in DM to a HE beam, significantly decreases ? by about 2 × 10{sup ?5} mm{sup 2}, and lowers ? by about 0.14 compared to LE images. A comparison of SE and DE CEDM at 4 min postcontrast shows equivalent power law parameters in unprocessed images, and lower ? and ? by about 3 × 10{sup ?5} mm{sup 2} and 0.50, respectively, in DE versus SE subtracted images.Conclusions: Image subtraction in both SE and DE CEDM reduces ? by over a factor of 2, while maintaining ? below that in DM. Given the equivalent ? between SE and DE unprocessed CEDM images, and the smaller anatomical noise in the DE subtracted images, the DE approach may have an advantage over SE CEDM. It will be necessary to test this potential advantage in future lesion detectability experiments, which account for realistic lesion signals. The authors' results suggest that LE images could be used in place of DM images in CEDM exam interpretation.

  7. Aerospace Applications of Magnetic Suspension Technology, part 1

    NASA Technical Reports Server (NTRS)

    Groom, Nelson J. (editor); Britcher, Colin P. (editor)

    1991-01-01

    Papers presented at the conference on aerospace applications of magnetic suspension technology are compiled. The following subject areas are covered: pointing and isolation systems; microgravity and vibration isolation; bearing applications; wind tunnel model suspension systems; large gap magnetic suspension systems; control systems; rotating machinery; science and application of superconductivity; and sensors.

  8. Aerospace Applications of Magnetic Suspension Technology, part 1

    SciTech Connect

    Groom, N.J.; Britcher, C.P.

    1991-03-01

    Papers presented at the conference on aerospace applications of magnetic suspension technology are compiled. The following subject areas are covered: pointing and isolation systems; microgravity and vibration isolation; bearing applications; wind tunnel model suspension systems; large gap magnetic suspension systems; control systems; rotating machinery; science and application of superconductivity; and sensors.

  9. Robot application for assembly process of engine part

    Microsoft Academic Search

    Kyoung-Taik Park; Young-Jae Shin; Chan-Hun Park; Yong-Sun Mo; Dong-Chul Jeong; Yoon Seong Shin

    2008-01-01

    Industrial robot is used to accomplish the repeated simple job efficiently and the improvement of its productivity is already proven in long time ago. But so far the industrial robot has the limitation of its application in industrial site. And in this study the technology of robot application is shown to expand the scope of robot application. Even though human

  10. Detecting content adaptive scaling of images for forensic applications

    NASA Astrophysics Data System (ADS)

    Fillion, Claude; Sharma, Gaurav

    2010-01-01

    Content-aware resizing methods have recently been developed, among which, seam-carving has achieved the most widespread use. Seam-carving's versatility enables deliberate object removal and benign image resizing, in which perceptually important content is preserved. Both types of modifications compromise the utility and validity of the modified images as evidence in legal and journalistic applications. It is therefore desirable that image forensic techniques detect the presence of seam-carving. In this paper we address detection of seam-carving for forensic purposes. As in other forensic applications, we pose the problem of seam-carving detection as the problem of classifying a test image in either of two classes: a) seam-carved or b) non-seam-carved. We adopt a pattern recognition approach in which a set of features is extracted from the test image and then a Support Vector Machine based classifier, trained over a set of images, is utilized to estimate which of the two classes the test image lies in. Based on our study of the seam-carving algorithm, we propose a set of intuitively motivated features for the detection of seam-carving. Our methodology for detection of seam-carving is then evaluated over a test database of images. We demonstrate that the proposed method provides the capability for detecting seam-carving with high accuracy. For images which have been reduced 30% by benign seam-carving, our method provides a classification accuracy of 91%.

  11. [The application of X-ray imaging in forensic medicine].

    PubMed

    Ku?erová, St?pánka; Safr, Miroslav; Ublová, Michaela; Urbanová, Petra; Hejna, Petr

    2014-07-01

    X-ray is the most common, basic and essential imaging method used in forensic medicine. It serves to display and localize the foreign objects in the body and helps to detect various traumatic and pathological changes. X-ray imaging is valuable in anthropological assessment of an individual. X-ray allows non-invasive evaluation of important findings before the autopsy and thus selection of the optimal strategy for dissection. Basic indications for postmortem X-ray imaging in forensic medicine include gunshot and explosive fatalities (identification and localization of projectiles or other components of ammunition, visualization of secondary missiles), sharp force injuries (air embolism, identification of the weapon) and motor vehicle related deaths. The method is also helpful for complex injury evaluation in abused victims or in persons where abuse is suspected. Finally, X-ray imaging still remains the gold standard method for identification of unknown deceased. With time modern imaging methods, especially computed tomography and magnetic resonance imaging, are more and more applied in forensic medicine. Their application extends possibilities of the visualization the bony structures toward a more detailed imaging of soft tissues and internal organs. The application of modern imaging methods in postmortem body investigation is known as digital or virtual autopsy. At present digital postmortem imaging is considered as a bloodless alternative to the conventional autopsy. PMID:25186776

  12. Development of prototype shielded cervical intracavitary brachytherapy applicators compatible with CT and MR imaging

    SciTech Connect

    Price, Michael J.; Jackson, Edward F.; Gifford, Kent A.; Eifel, Patricia J.; Mourtada, Firas [Department of Radiation Physics, University of Texas M.D. Anderson Cancer Center, 1220 Holcombe Boulevard Houston, Texas 77030 (United States); Graduate School of Biomedical Sciences, University of Texas-Houston, 6767 Bertner Avenue, Houston, Texas 77030 (United States); and Department of Physics, Louisiana State University, 202 Nicholson Hall, Tower Drive, Baton Rouge, Louisiana 70803 (United States); Department of Imaging Physics, University of Texas M.D. Anderson Cancer Center, 1220 Holcombe Boulevard, Houston, Texas 77030 (United States) and Graduate School of Biomedical Sciences, University of Texas-Houston, 6767 Bertner Avenue, Houston, Texas 77030 (United States); Department of Radiation Physics, University of Texas M.D. Anderson Cancer Center, 1220 Holcombe Blvd., Houston, Texas 77030 (United States) and Graduate School of Biomedical Sciences, University of Texas-Houston, 6767 Bertner Avenue, Houston, Texas 77030 (United States); Division of Radiation Oncology, University of Texas M.D. Anderson Cancer Center, 1220 Holcombe Boulevard, Houston, Texas 77030 (United States) and Graduate School of Biomedical Sciences, University of Texas-Houston, 6767 Bertner Avenue, Houston, Texas 77030 (United States); Department of Radiation Physics, University of Texas M.D. Anderson Cancer Center, 1220 Holcombe Blvd., Houston, Texas 77030 (United States) and Graduate School of Biomedical Sciences, University of Texas-Houston, 6767 Bertner Avenue, Houston, Texas 77030 (United States)

    2009-12-15

    Purpose: Intracavitary brachytherapy (ICBT) is an integral part of the treatment regimen for cervical cancer and, generally, outcome in terms of local disease control and complications is a function of dose to the disease bed and critical structures, respectively. Therefore, it is paramount to accurately determine the dose given via ICBT to the tumor bed as well as critical structures. This is greatly facilitated through the use of advanced three-dimensional imaging modalities, such as CT and MR, to delineate critical and target structures with an ICBT applicator inserted in vivo. These methods are not possible when using a shielded applicator due to the image artifacts generated by interovoid shielding. The authors present two prototype shielded ICBT applicators that can be utilized for artifact-free CT image acquisition. They also investigate the MR amenability and dosimetry of a novel tungsten-alloy shielding material to extend the functionality of these devices. Methods: To accomplish artifact-free CT image acquisition, a ''step-and-shoot'' (S and S) methodology was utilized, which exploits the prototype applicators movable interovoid shielding. Both prototypes were placed in imaging phantoms that positioned the applicators in clinically applicable orientations. CT image sets were acquired of the prototype applicators as well as a shielded Fletcher-Williamson (sFW) ovoid. Artifacts present in each CT image set were qualitatively compared for each prototype applicator following the S and S methodology and the sFW. To test the novel tungsten-alloy shielding material's MR amenability, they constructed a phantom applicator that mimics the basic components of an ICBT ovoid. This phantom applicator positions the MR-compatible shields in orientations equivalent to the sFW bladder and rectal shields. MR images were acquired within a gadopentetate dimeglumine-doped water tank using standard pulse sequences and examined for artifacts. In addition, Monte Carlo simulations were performed to match the attenuation due to the thickness of this new shield type with current, clinically utilized ovoid shields and a {sup 192}Ir HDR/PDR source. Results: Artifact-free CT images could be acquired of both generation applicators in a clinically applicable geometry using the S and S method. MR images were acquired of the phantom applicator containing shields, which contained minimal, clinically relevant artifacts. The thickness required to match the dosimetry of the MR-compatible and sFW rectal shields was determined using Monte Carlo simulations. Conclusions: Utilizing a S and S imaging method in conjunction with prototype applicators that feature movable interovoid shields, they were able to acquire artifact-free CT image sets in a clinically applicable geometry. MR images were acquired of a phantom applicator that contained shields composed of a novel tungsten alloy. Artifacts were largely limited to regions within the ovoid cap and are of no clinical interest. The second generation A{sup 3} utilizes this material for interovoid shielding.

  13. Electromagnetic inverse applications for functional brain imaging

    SciTech Connect

    Wood, C.C.

    1997-10-01

    This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). This project addresses an important mathematical and computational problem in functional brain imaging, namely the electromagnetic {open_quotes}inverse problem.{close_quotes} Electromagnetic brain imaging techniques, magnetoencephalography (MEG) and electroencephalography (EEG), are based on measurements of electrical potentials and magnetic fields at hundreds of locations outside the human head. The inverse problem is the estimation of the locations, magnitudes, and time-sources of electrical currents in the brain from surface measurements. This project extends recent progress on the inverse problem by combining the use of anatomical constraints derived from magnetic resonance imaging (MRI) with Bayesian and other novel algorithmic approaches. The results suggest that we can achieve significant improvements in the accuracy and robustness of inverse solutions by these two approaches.

  14. Neural networks: Application to medical imaging

    NASA Technical Reports Server (NTRS)

    Clarke, Laurence P.

    1994-01-01

    The research mission is the development of computer assisted diagnostic (CAD) methods for improved diagnosis of medical images including digital x-ray sensors and tomographic imaging modalities. The CAD algorithms include advanced methods for adaptive nonlinear filters for image noise suppression, hybrid wavelet methods for feature segmentation and enhancement, and high convergence neural networks for feature detection and VLSI implementation of neural networks for real time analysis. Other missions include (1) implementation of CAD methods on hospital based picture archiving computer systems (PACS) and information networks for central and remote diagnosis and (2) collaboration with defense and medical industry, NASA, and federal laboratories in the area of dual use technology conversion from defense or aerospace to medicine.

  15. Stereo imaging velocimetry for microgravity applications

    NASA Technical Reports Server (NTRS)

    Miller, Brian B.; Meyer, Maryjo B.; Bethea, Mark D.

    1994-01-01

    Stereo imaging velocimetry is the quantitative measurement of three-dimensional flow fields using two sensors recording data from different vantage points. The system described in this paper, under development at NASA Lewis Research Center in Cleveland, Ohio, uses two CCD cameras placed perpendicular to one another, laser disk recorders, an image processing substation, and a 586-based computer to record data at standard NTSC video rates (30 Hertz) and reduce it offline. The flow itself is marked with seed particles, hence the fluid must be transparent. The velocimeter tracks the motion of the particles, and from these we deduce a multipoint (500 or more), quantitative map of the flow. Conceptually, the software portion of the velocimeter can be divided into distinct modules. These modules are: camera calibration, particle finding (image segmentation) and centroid location, particle overlap decomposition, particle tracking, and stereo matching. We discuss our approach to each module, and give our currently achieved speed and accuracy for each where available.

  16. Silica-based nanoprobes for biomedical imaging and theranostic applications

    PubMed Central

    Vivero-Escoto, Juan L.; Huxford-Phillips, Rachel C.

    2013-01-01

    Nanoparticle-based contrast agents are attracting a great deal of attention for various biomedical imaging and theranostic applications. Compared to conventional contrast agents, nanoparticles possess several potential advantages to improve in vivo detection and to enhance targeting efficiency. Silica-based nanoprobes can be engineered to achieve longer blood circulation times, specific clearance pathways, and multivalent binding. In this tutorial review, we summarize the latest progress on designing silica-based nanoprobes for imaging and theranostic applications. The synthesis of both solid silica and mesoporous silica nanoparticles is described, along with different approaches used for surface functionalization. Special emphasis is placed on the application of silica-based nanoprobes in optical, magnetic resonance, and multimodal imaging. The latest breakthroughs in the applications of silica nanoparticles as theranostic agents are also highlighted. PMID:22234515

  17. Lanthanide-functionalized nanoparticles as MRI and luminescent probes for sensing and/or imaging applications.

    PubMed

    Comby, Steve; Surender, Esther M; Kotova, Oxana; Truman, Laura K; Molloy, Jennifer K; Gunnlaugsson, Thorfinnur

    2014-02-17

    The combination of lanthanides and nanoparticles to develop new hybrid nanomaterials has become a highly topical area of research in the field of sensing, biomedical imaging, drug delivery, etc. However, these novel nanomaterials have to be carefully designed to ensure that the unique properties conveyed by each component, i.e., lanthanide ions and nanoparticles, are maximized and not negatively affected by one another. In this Forum Article, the main advances in the design of lanthanide-based nanoparticles will be discussed, with the first part focusing on the design of gadolinium(III)-based nanoparticles and their use as magnetic resonance imaging agents. The second part will then describe the main and most recent designs of luminescent lanthanide-based nanoparticles and their applications as sensors or imaging agents, with a special emphasis on our contribution to this area. PMID:24354305

  18. DEVELOPMENT OF IMAGE PROCESSING APPLICATIONS WITHIN A COOPERATIVE KNOWLEDGE-BASED WORKBENCH

    E-print Network

    Boyer, Edmond

    DEVELOPMENT OF IMAGE PROCESSING APPLICATIONS WITHIN A COOPERATIVE KNOWLEDGE-BASED WORKBENCH Solving an Image Processing problem involves three main categories of experts: experts from the domain of application (biologists, geographers...), Image Processing experts and designer-programmers. Domain experts

  19. 40 CFR 268.2 - Definitions applicable in this part.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Subpart D, Part 268, namely lead acid batteries, cadmium batteries...appendix XI of this part. (k) Soil means unconsolidated earth...processes and is made up primarily of soil by volume based on visual inspection...prohibited hazardous waste with soil that changes its treatment...

  20. 40 CFR 268.2 - Definitions applicable in this part.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Subpart D, Part 268, namely lead acid batteries, cadmium batteries...appendix XI of this part. (k) Soil means unconsolidated earth...processes and is made up primarily of soil by volume based on visual inspection...prohibited hazardous waste with soil that changes its treatment...

  1. Development of a multi-spectral imaging system for medical applications

    NASA Astrophysics Data System (ADS)

    Vo-Dinh, Tuan; Cullum, Brian; Kasili, Paul

    2003-07-01

    We describe the development of a multi-spectral imaging (MSI) system based on a rapid-scanning solid-state device, an acousto-optic tunable filter (AOTF), for wavelength selection and a two-dimensional charge-coupled device for detection. The MSI device is designed for in vivo optical detection in medical diagnostic applications. Unlike conventional grating spectrometers, the AOTF is a miniature solid-state device that has no moving parts, and can be rapidly tuned to any wavelength within its operating range. The large aperture of the AOTF and its high spatial resolution allows the optical image from an imaging fibre optic probe to be recorded by the detector. These characteristics, combined with their small size, make AOTFs important new alternatives to conventional monochromators, especially for spectral imaging in biomedical applications. The MSI can also be used for dual-modality diagnostics to detect both fluorescence and diffuse reflectance images. The usefulness and potential of the MSI system is illustrated in several applications of biomedical interest, such as reflectance fluorescence imaging of skin and brain tissues.

  2. Spaceborne Imaging Radar: Geologic and Oceanographic Applications

    Microsoft Academic Search

    Charles Elachi

    1980-01-01

    Synoptic, large-area radar images of the earth's land and ocean surface, obtained from the Seasat orbiting spacecraft, show the potential for geologic mapping and for monitoring of ocean surface patterns. Structural and topographic features such as lineaments, anticlines, folds and domes, drainage patterns, stratification, and roughness units can be mapped. Ocean surface waves, internal waves, current boundaries, and large-scale eddies

  3. 3D integration technologies for imaging applications

    NASA Astrophysics Data System (ADS)

    De Moor, Piet

    2008-06-01

    The aim of this paper is to give an overview of micro-electronic technologies under development today, and how they are impacting on the radiation detection and imaging of tomorrow. After a short introduction, the different enabling technologies will be discussed. Finally, a few examples of ongoing developments at IMEC on advanced detector systems will be given.

  4. Image analysis: Applications in materials engineering

    SciTech Connect

    Wojnar, L.

    1999-07-01

    This new practical book describes the basic principles of image acquisition, enhancement, measurement, and interpretation in very simple nonmathematical terms. it also provides solution-oriented algorithms and examples and case histories from industry and research, along with quick reference information on various specific problems. Included are numerous tables, graphs, charts, and working examples in detection of grain boundaries, pores, and chain structures.

  5. Thermoelectric infrared imager and automotive applications

    NASA Astrophysics Data System (ADS)

    Hirota, Masaki; Satou, Fuminori; Saito, Masanori; Kishi, Youichi; Nakajima, Yasushi; Uchiyama, Makato

    2001-10-01

    This paper describes a newly developed thermoelectric infrared imager having a 48 X 32 element thermoelectric focal plane array (FPA) and an experimental vehicle featuring a blind spot pedestrian warning system, which employs four infrared imagers. The imager measures 100 mm in width, 60 mm in height and 80 mm in depth, weighs 400 g, and has an overall field of view (FOV) of 40 deg X 20 deg. The power consumption of the imager is 3 W. The pedestrian detection program is stored in a CPU chip on a printed circuit board (PCB). The FPA provides high responsivity of 2,100 V/W, a time constant of 25 msec, and a low cost potential. Each element has external dimensions of 190 ?m x 190 ?m, and consists of six pairs of thermocouples and an Au-black absorber that is precisely patterned by low-pressure evaporation and lift-off technologies. The experimental vehicle is called the Nissan ASV-2 (Advanced Safety Vehicle-2), which incorporates a wide range of integrated technologies aimed at reducing traffic accidents. The blind spot pedestrian warning system alerts the driver to the presence of a pedestrian in a blind spot by detecting the infrared radiation emitted from the person's body. This system also prevents the vehicle from moving in the direction of the pedestrian.

  6. Infrared Scanning Images: An Archeological Application

    Microsoft Academic Search

    Gerald G. Schaber; George J. Gumerman

    1969-01-01

    Arterial infrared scanner images of an area near the Little Colorado River in north-central Arizona disclosed the existence of scattered clusters of parallel linear features in the ashfall area of Sunset Crater. The features are not obvious in conventional aerial photographs, and only one cluster could be recognized on the ground. Soil and pollen analyses reveal that they are prehistoric

  7. Infrared Thermal Imaging: Fundamentals, Research and Applications

    Microsoft Academic Search

    Gorazd Planinsic

    2011-01-01

    Ten years ago, a book with a title like this would be interesting only to a narrow circle of specialists. Thanks to rapid advances in technology, the price of thermal imaging devices has dropped sharply, so they have, almost overnight, become accessible to a wide range of users. As the authors point out in the preface, the growth of this

  8. Radiation transport phenomena and modeling. Part A: Codes; Part B: Applications with examples

    SciTech Connect

    Lorence, L.J. Jr.; Beutler, D.E. [Sandia National Labs., Albuquerque, NM (United States). Simulation Technology Research Dept.

    1997-09-01

    This report contains the notes from the second session of the 1997 IEEE Nuclear and Space Radiation Effects Conference Short Course on Applying Computer Simulation Tools to Radiation Effects Problems. Part A discusses the physical phenomena modeled in radiation transport codes and various types of algorithmic implementations. Part B gives examples of how these codes can be used to design experiments whose results can be easily analyzed and describes how to calculate quantities of interest for electronic devices.

  9. High speed global shutter image sensors for professional applications

    NASA Astrophysics Data System (ADS)

    Wu, Xu; Meynants, Guy

    2015-04-01

    Global shutter imagers expand the use to miscellaneous applications, such as machine vision, 3D imaging, medical imaging, space etc. to eliminate motion artifacts in rolling shutter imagers. A low noise global shutter pixel requires more than one non-light sensitive memory to reduce the read noise. But larger memory area reduces the fill-factor of the pixels. Modern micro-lenses technology can compensate this fill-factor loss. Backside illumination (BSI) is another popular technique to improve the pixel fill-factor. But some pixel architecture may not reach sufficient shutter efficiency with backside illumination. Non-light sensitive memory elements make the fabrication with BSI possible. Machine vision like fast inspection system, medical imaging like 3D medical or scientific applications always ask for high frame rate global shutter image sensors. Thanks to the CMOS technology, fast Analog-to-digital converters (ADCs) can be integrated on chip. Dual correlated double sampling (CDS) on chip ADC with high interface digital data rate reduces the read noise and makes more on-chip operation control. As a result, a global shutter imager with digital interface is a very popular solution for applications with high performance and high frame rate requirements. In this paper we will review the global shutter architectures developed in CMOSIS, discuss their optimization process and compare their performances after fabrication.

  10. Application of a Cumulative Method for Car Borders Specification in Image

    Microsoft Academic Search

    Martin DOBROVOLNÝ; Martin HÁJEK

    2008-01-01

    The paper deals with low-level car detection methods in images. The car detection is an integral part of all intelligent car cruise systems. This article describes the method for suppression of the edges produced by classical edge's operators, based on application of the cumulative method. The designed method uses the non-stationary property of the picture background in time-realizations of the

  11. Biofunctionalized prussian blue nanoparticles for multimodal molecular imaging applications.

    PubMed

    Vojtech, Jennifer M; Cano-Mejia, Juliana; Dumont, Matthieu F; Sze, Raymond W; Fernandes, Rohan

    2015-01-01

    Multimodal, molecular imaging allows the visualization of biological processes at cellular, subcellular, and molecular-level resolutions using multiple, complementary imaging techniques. These imaging agents facilitate the real-time assessment of pathways and mechanisms in vivo, which enhance both diagnostic and therapeutic efficacy. This article presents the protocol for the synthesis of biofunctionalized Prussian blue nanoparticles (PB NPs)--a novel class of agents for use in multimodal, molecular imaging applications. The imaging modalities incorporated in the nanoparticles, fluorescence imaging and magnetic resonance imaging (MRI), have complementary features. The PB NPs possess a core-shell design where gadolinium and manganese ions incorporated within the interstitial spaces of the PB lattice generate MRI contrast, both in T1 and T2-weighted sequences. The PB NPs are coated with fluorescent avidin using electrostatic self-assembly, which enables fluorescence imaging. The avidin-coated nanoparticles are modified with biotinylated ligands that confer molecular targeting capabilities to the nanoparticles. The stability and toxicity of the nanoparticles are measured, as well as their MRI relaxivities. The multimodal, molecular imaging capabilities of these biofunctionalized PB NPs are then demonstrated by using them for fluorescence imaging and molecular MRI in vitro. PMID:25993028

  12. New applications of modulated digital images in document security

    NASA Astrophysics Data System (ADS)

    Lee, Robert A.; Leech, Patrick W.; McCarthy, Lawry D.; Swiegers, Gerhard F.

    2006-02-01

    In previous work we have demonstrated that selective masking, or modulation, of digital images can be used to create documents and transparent media containing covert or optically variable, overt images. In the present work we describe new applications and techniques of such "modulated digital images" (MDI's) in document security. In particular, we demonstrate that multiple hidden images can be imperceptibly concealed within visible, host images by incorporating them as a new, half-tone, printing screen. Half-toned hidden images of this type may contain a variety of novel features that hinder unauthorized copying, including concealed multiple images, and microprinted-, color-, and various fadeeffects. Black-and-white or full color images may be readily used in this respect. We also report a new technique for the embossing of multiple, covert- or optically variable, overt-images into transparent substrates. This method employs an embossing tool that is prepared using a combination of electron beam and greytone lithography. Two approaches may be used: (i) a double-sided "soft" emboss into curable, transparent, lacquer layers, and (ii) a single-sided "hot" emboss in which multiple, dithered images consisting of distinctly-sloped microprisms are impressed into the substrate. Technique (ii) requires a novel, electron-beam-originated master dye.

  13. Imaging applications of the sparse FFT

    E-print Network

    Shi, Lixin, S.M. Massachusetts Institute of Technology

    2013-01-01

    The sparse Fourier transform leverages the intrinsic sparsity of the frequency spectrum in many natural applications to compute the discrete Fourier Transform (DFT) in sub-linear time. Consequently, it has the potential ...

  14. Aerospace Applications of Magnetic Suspension Technology, part 2

    NASA Technical Reports Server (NTRS)

    Groom, Nelson J. (editor); Britcher, Colin P. (editor)

    1991-01-01

    In order to examine the state of technology of all areas of magnetic suspension with potential aerospace applications, and to review related recent developments in sensors and control approaches, superconducting technology, and design/implementation practices, a workshop was held at NASA-Langley. Areas of concern are pointing and isolation systems, microgravity and vibration isolation, bearing applications, wind tunnel model suspension systems, large gap magnetic suspension systems, controls, rotating machinery, science and applications of superconductivity, and sensors. Papers presented are included.

  15. Aerospace applications of magnetic suspension technology, part 2

    SciTech Connect

    Groom, N.J.; Britcher, C.P.

    1991-03-01

    In order to examine the state of technology of all areas of magnetic suspension with potential aerospace applications, and to review related recent developments in sensors and control approaches, superconducting technology, and design/implementation practices, a workshop was held at NASA-Langley. Areas of concern are pointing and isolation systems, microgravity and vibration isolation, bearing applications, wind tunnel model suspension systems, large gap magnetic suspension systems, controls, rotating machinery, science and applications of superconductivity, and sensors. Papers presented are included.

  16. Anatomical noise in contrast-enhanced digital mammography. Part I. Single-energy imaging

    SciTech Connect

    Hill, Melissa L.; Yaffe, Martin J. [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Department of Medical Biophysics, University of Toronto, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Mainprize, James G. [Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Carton, Ann-Katherine; Muller, Serge [GE Healthcare, 283 rue de la Miniere, Buc 78530 (France); Ebrahimi, Mehran [Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4 (Canada); Jong, Roberta A. [Breast Imaging, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5 (Canada); Dromain, Clarisse [Department of Radiology, Institut Gustave Roussy, 39 rue Camille Desmoulin, Villejuif 94805 (France)

    2013-05-15

    Purpose: The use of an intravenously injected iodinated contrast agent could help increase the sensitivity of digital mammography by adding information on tumor angiogenesis. Two approaches have been made for clinical implementation of contrast-enhanced digital mammography (CEDM), namely, single-energy (SE) and dual-energy (DE) imaging. In each technique, pairs of mammograms are acquired, which are then subtracted with the intent to cancel the appearance of healthy breast tissue to permit sensitive detection and specific characterization of lesions. Patterns of contrast agent uptake in the healthy parenchyma, and uncanceled signal from background tissue create a 'clutter' that can mask or mimic an enhancing lesion. This type of 'anatomical noise' is often the limiting factor in lesion detection tasks, and thus, noise quantification may be useful for cascaded systems analysis of CEDM and for phantom development. In this work, the authors characterize the anatomical noise in CEDM clinical images and the authors evaluate the influence of the x-ray energy used for acquisition, the presence of iodine in the breast, and the timing of imaging postcontrast administration on anatomical noise. The results are presented in a two-part report, with SE CEDM described here, and DE CEDM in Part II. Methods: A power law is used to model anatomical noise in CEDM images. The exponent, {beta}, which describes the anatomical structure, and the constant {alpha}, which represents the magnitude of the noise, are determined from Wiener spectra (WS) measurements on images. A total of 42 SE CEDM cases from two previous clinical pilot studies are assessed. The parameters {alpha} and {beta} are measured both from unprocessed images and from subtracted images. Results: Consistent results were found between the two SE CEDM pilot studies, where a significant decrease in {beta} from a value of approximately 3.1 in the unprocessed images to between about 1.1 and 1.8 in the subtracted images was observed. Increasing the x-ray energy from that used in conventional DM to those of typical SE CEDM spectra with mean energies above 33 keV significantly decreased {alpha} by about a factor of 19, in agreement with theory. Compared to precontrast images, in the unprocessed postcontrast images at 30 s postinjection, {alpha} was larger by about 7.4 Multiplication-Sign 10{sup -7} mm{sup 2} and {beta} was decreased by 0.2. While {alpha} did not vary significantly with the time after contrast administration, {beta} from the unprocessed image WS increased linearly, and {beta} from subtracted image WS increased with an initial quadratic relationship that plateaued by about 5 min postinjection. Conclusions: The presence of an iodinated contrast agent in the breast produced small, but significant changes in the power law parameters of unprocessed CEDM images compared to the precontrast images. Image subtraction in SE CEDM significantly reduced anatomical noise compared to conventional DM, with a reduction in both {alpha} and {beta} by about a factor of 2. The data presented here, and in Part II of this work, will be useful for modeling of CEDM backgrounds, for systems characterization and for lesion detectability experiments using models that account for anatomical noise.

  17. Performance assessment of 3D surface imaging technique for medical imaging applications

    NASA Astrophysics Data System (ADS)

    Li, Tuotuo; Geng, Jason; Li, Shidong

    2013-03-01

    Recent development in optical 3D surface imaging technologies provide better ways to digitalize the 3D surface and its motion in real-time. The non-invasive 3D surface imaging approach has great potential for many medical imaging applications, such as motion monitoring of radiotherapy, pre/post evaluation of plastic surgery and dermatology, to name a few. Various commercial 3D surface imaging systems have appeared on the market with different dimension, speed and accuracy. For clinical applications, the accuracy, reproducibility and robustness across the widely heterogeneous skin color, tone, texture, shape properties, and ambient lighting is very crucial. Till now, a systematic approach for evaluating the performance of different 3D surface imaging systems still yet exist. In this paper, we present a systematic performance assessment approach to 3D surface imaging system assessment for medical applications. We use this assessment approach to exam a new real-time surface imaging system we developed, dubbed "Neo3D Camera", for image-guided radiotherapy (IGRT). The assessments include accuracy, field of view, coverage, repeatability, speed and sensitivity to environment, texture and color.

  18. 37 CFR 7.25 - Sections of part 2 applicable to extension of protection.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...of part 2 applicable to extension of protection. 7.25 Section 7.25 Patents...REGISTRATION OF MARKS Extension of Protection to the United States § 7.25 Sections of part 2 applicable to extension of protection. (a) Except for §§...

  19. 37 CFR 7.25 - Sections of part 2 applicable to extension of protection.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...of part 2 applicable to extension of protection. 7.25 Section 7.25 Patents...REGISTRATION OF MARKS Extension of Protection to the United States § 7.25 Sections of part 2 applicable to extension of protection. (a) Except for §§...

  20. 37 CFR 7.25 - Sections of part 2 applicable to extension of protection.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...of part 2 applicable to extension of protection. 7.25 Section 7.25 Patents...REGISTRATION OF MARKS Extension of Protection to the United States § 7.25 Sections of part 2 applicable to extension of protection. (a) Except for §§...

  1. Multi-agent Robust Consensus -Part II: Application to Distributed Event-triggered Coordination

    E-print Network

    Johansson, Karl Henrik

    Multi-agent Robust Consensus -Part II: Application to Distributed Event-triggered Coordination Guodong Shi and Karl Henrik Johansson Abstract-- In the first part of the paper, robust consensus was discussed for continuous-time multi-agent systems with uncertainties in the dynamics. As an application

  2. 13 CFR 117.2 - Application of this part.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Credit and Assistance SMALL BUSINESS ADMINISTRATION NONDISCRIMINATION IN...administered by the Small Business Administration, whether or not the specific...part does not apply to the employment practices of any...

  3. 13 CFR 117.2 - Application of this part.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Credit and Assistance SMALL BUSINESS ADMINISTRATION NONDISCRIMINATION IN...administered by the Small Business Administration, whether or not the specific...part does not apply to the employment practices of any...

  4. 12 CFR Appendix B to Part 1002 - Model Application Forms

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Part 1002 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION EQUAL CREDIT OPPORTUNITY ACT (REGULATION B) Pt. 1002, App. B...designated for use in a particular type of consumer credit transaction as...

  5. 12 CFR Appendix B to Part 1002 - Model Application Forms

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...Part 1002 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION EQUAL CREDIT OPPORTUNITY ACT (REGULATION B) Pt. 1002, App. B...designated for use in a particular type of consumer credit transaction as...

  6. 12 CFR Appendix B to Part 1002 - Model Application Forms

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Part 1002 Banks and Banking BUREAU OF CONSUMER FINANCIAL PROTECTION EQUAL CREDIT OPPORTUNITY ACT (REGULATION B) Pt. 1002, App. B...designated for use in a particular type of consumer credit transaction as...

  7. 22 CFR Exhibit A to Part 204 - Application for Compensation

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    22 Foreign Relations 1 2010-04-01 2010-04-01...Exhibit A to Part 204 Foreign Relations AGENCY FOR INTERNATIONAL DEVELOPMENT HOUSING GUARANTY...and Urban Programs, Agency for International Development,...

  8. Derated application of parts for (Electronic System Division) systems development

    NASA Astrophysics Data System (ADS)

    1983-09-01

    This document establishes part derating to be implemented on AFSC/ESD contracts. These criteria were prepared for ESD by RADC/RB and reflect the design derating criteria prepared for them under contract F30602-81-V-0073, as well as other RADC data. Established derating values for the majority of parts in MIL-HDBK-217, and a suggested approach for verification of derating parameters are included.

  9. The simulation of transients in thermal plant. Part II: Applications

    Microsoft Academic Search

    G. L. Morini; S. Piva

    2008-01-01

    This paper deals with the simulation of the transients of thermal plant with control systems. In the companion paper forming part I of this article [G.L. Morini, S. Piva, The simulation of transients in thermal plant. Part I: Mathematical model, Applied Thermal Engineering 27 (2007) 2138–2144] it has been described how a “thermal-library” of customised blocks can be built and

  10. Infrared scanning images: an archeological application.

    PubMed

    Schaber, G G; Gumerman, G J

    1969-05-01

    Aerial infrared scanner images of an area near the Little Colorado River in north-central Arizona disclosed the existence of scattered clusters of parallel linear features in the ashfall area of Sunset Crater. The features are not obvious in conventional aerial photographs, and only one cluster could be recognized on the ground. Soil and pollen analyses reveal that they are prehistoric agricultural plots. PMID:17839350

  11. Iterative image fusion technique using fuzzy and neuro fuzzy logic and applications

    Microsoft Academic Search

    Rahul Ranjan; H. Singh; T. Meitzler; G. R. Gerhart

    2005-01-01

    Image fusion has attracted a widespread attention owing to applications in medical imaging, automotive and remote sensing. Image fusion deals with integrating data obtained from different sources of information for intelligent systems. Image fusion provides output as a single image from a set of input images obtained from different sources or techniques. Different approaches in image fusion provide different type

  12. X-ray imaging for security applications

    NASA Astrophysics Data System (ADS)

    Evans, J. Paul

    2004-01-01

    The X-ray screening of luggage by aviation security personnel may be badly hindered by the lack of visual cues to depth in an image that has been produced by transmitted radiation. Two-dimensional "shadowgraphs" with "organic" and "metallic" objects encoded using two different colors (usually orange and blue) are still in common use. In the context of luggage screening there are no reliable cues to depth present in individual shadowgraph X-ray images. Therefore, the screener is required to convert the 'zero depth resolution' shadowgraph into a three-dimensional mental picture to be able to interpret the relative spatial relationship of the objects under inspection. Consequently, additional cognitive processing is required e.g. integration, inference and memory. However, these processes can lead to serious misinterpretations of the actual physical structure being examined. This paper describes the development of a stereoscopic imaging technique enabling the screener to utilise binocular stereopsis and kinetic depth to enhance their interpretation of the actual nature of the objects under examination. Further work has led to the development of a technique to combine parallax data (to calculate the thickness of a target material) with the results of a basis material subtraction technique to approximate the target's effective atomic number and density. This has been achieved in preliminary experiments with a novel spatially interleaved dual-energy sensor which reduces the number of scintillation elements required by 50% in comparison to conventional sensor configurations.

  13. Current capabilities and clinical applications of image cytometry

    SciTech Connect

    Mayall, B.H.

    1986-01-01

    The principles of image cytometry are discussed and their application to problems of clinical relevance is illustrated. Image cytometry is based on familiar technology, it now is commercially available and is relatively inexpensive, and it is ready to be applied directly in the clinical laboratory. Image cytometry, when used as an adjunct to conventional pathodiagnosis and clinical evaluation, will provide pathologists and clinicians with a technique of great diagnostic power. It will assist in establishing the prognosis and therapeutic response of patients, particularly those suffering from malignant and premalignant conditions. Routine application of cytometry, both image and flow, will improve the quality and rationale of patient therapy and so will lead to better health care and possibly to lowered morbidity and mortality. 19 refs., 3 figs.

  14. Investigating clutter reduction for unmanned systems applications using imaging polarimetry

    NASA Astrophysics Data System (ADS)

    Hanks, Jonathan B.; Aycock, Todd M.; Chenault, David B.

    2014-06-01

    The proliferation of unmanned systems in recent years has sparked increased interest in multiple areas of research for on-board image processing including autonomous navigation, surveillance, detection, and tracking to name a few. For these applications, techniques for reducing scene clutter provide an increased level of robustness for autonomous systems and reduced operator burden for tele-operated systems. Because imaging polarimetry frequently provides complementary information to the standard radiometric image, it is anticipated that this technology is well suited to provide a significant reduction in scene clutter. In this paper, the authors investigate the use of imaging polarimetry under a number of representative scenarios to assess the utility of this technology for unmanned system applications.

  15. X-ray characterization of CMOS imaging detector with high resolution for fluoroscopic imaging application

    NASA Astrophysics Data System (ADS)

    Cha, Bo Kyung; Kim, Cho Rong; Jeon, Seongchae; Kim, Ryun Kyung; Seo, Chang-Woo; Yang, Keedong; Heo, Duchang; Lee, Tae-Bum; Shin, Min-Seok; Kim, Jong-Boo; Kwon, Oh-Kyung

    2013-12-01

    This paper introduces complementary metal-oxide semiconductor (CMOS) active pixel sensor (APS)-based X-ray imaging detectors with high spatial resolution for medical imaging application. In this study, our proposed X-ray CMOS imaging sensor has been fabricated by using a 0.35 ?m 1 Poly 4 Metal CMOS process. The pixel size is 100 ?m×100 ?m and the pixel array format is 24×96 pixels, which provide a field-of-view (FOV) of 9.6 mm×2.4 mm. The 14.3-bit extend counting analog-to digital converter (ADC) with built-in binning mode was used to reduce the area and simultaneously improve the image resolution. Both thallium-doped CsI (CsI:Tl) and Gd2O2S:Tb scintillator screens were used as converters for incident X-rays to visible light photons. The optical property and X-ray imaging characterization such as X-ray to light response as a function of incident X-ray exposure dose, spatial resolution and X-ray images of objects were measured under different X-ray energy conditions. The measured results suggest that our developed CMOS-based X-ray imaging detector has the potential for fluoroscopic imaging and cone-beam computed tomography (CBCT) imaging applications.

  16. Improved tensor scale computation with application to medical image interpolation

    Microsoft Academic Search

    Ziyue Xu; Milan Sonka; Punam K. Saha

    2011-01-01

    Tensor scale (t-scale) is a parametric representation of local structure morphology that simultaneously describes its orientation, shape and isotropic scale. At any image location, t-scale represents the largest ellipse (an ellipsoid in three dimensions) centered at that location and contained in the same homogeneous region. Here, we present an improved algorithm for t-scale computation and study its application to image

  17. Biological applications of fluorescence lifetime imaging beyond microscopy

    NASA Astrophysics Data System (ADS)

    Akers, Walter J.; Berezin, Mikhail Y.; Lee, Hyeran; Guo, Kevin; Almutairi, Adah; Fréchet, Jean M. J.; Fischer, Georg M.; Daltrozzo, Ewald; Achilefu, Samuel

    2010-02-01

    Fluorescence lifetime is a relatively new contrast mechanism for optical imaging in living subjects that relies on intrinsic properties of fluorophores rather than concentration dependent intensity. Drawing upon the success of fluorescence lifetime imaging microscopy (FLIM) for investigation of protein-protein interactions and intracellular physiology, in vivo fluorescence lifetime imaging (FLI) promises to dramatically increase the utility of fluorescencebased imaging in preclinical and clinical applications. Intrinsic fluorescence lifetime measurements in living tissues can distinguish pathologies such as cancer from healthy tissue. Unfortunately, intrinsic FLT contrast is limited to superficial measurements. Conventional intensity-based agents have been reported for measuring these phenomena in vitro, but translation into living animals is difficult due to optical properties of tissues. For this reason, contrast agents that can be detected in the near infrared (NIR) wavelengths are being developed by our lab and others to enhance the capabilities of this modality. FLT is less affected by concentration and thus is better for detecting small changes in physiology, as long as sufficient fluorescence signal can be measured. FLT can also improve localization of signals for improved deep tissue imaging. Examples of the utility of exogenous contrast agents will be discussed, including applications in monitoring physiologic functions, controlled drug release and cancer biology. Instrumentation for FLI will also be discussed, including planar and diffuse optical imaging in time and frequency domains. Future applications will also be discussed that are being developed in this exciting field that complement other optical modalities.

  18. Multi-Sensor Fusion of Electro-Optic and Infrared Signals for High Resolution Visible Images: Part II

    E-print Network

    Multi-Sensor Fusion of Electro-Optic and Infrared Signals for High Resolution Visible Images: Part temperature variation of objects in the daytime via high-resolution EO images. The proposed novel framework objects' temperature information onto original EO images via the modified NTSC color space transformation

  19. Geological applications using an electrical micro imaging tool

    SciTech Connect

    Eubanks, D.; Seiler, D. [Halliburton Energy Services, Houston, TX (United States); Russell, B. [Focus Energy, Shreveport, LA (United States)

    1995-11-20

    The resistivity micro imaging tool introduced by Halliburton produces electrical images that are being used in a variety of geological applications. The tool is a microresistivity-type imaging device with six independent articulating arms extending from the main body.Each arm is mounted with a pad containing a 25-electrode scanning array. The EMI tool and all other micro imaging devices measure changes in resistivity along the borehole wall that correspond to subtle changes in rock composition, grain texture, and fluid properties. High-end graphics software processes the data to produce highly visual 2D and 3D images of the borehole. The paper describes the use of this tool in fault analysis, fracture analysis, rock texture, strata dip analysis, and thin-bed analysis.

  20. X-ray backscatter imaging for aerospace applications

    SciTech Connect

    Shedlock, Daniel [Nucsafe, Inc., 601 Oak Ridge Turnpike, Oak Ridge, TN 37830 (United States); Edwards, Talion [Boeing Research and Technology, 5775 Campus Parkway, Hazelwood, MO 63042 (United States); Toh, Chin [Boeing Research and Technology, 2201 Seal Beach Blvd, Seal Beach, CA 90740 (United States)

    2011-06-23

    Scatter x-ray imaging (SXI) is a real time, digital, x-ray backscatter imaging technique that allows radiographs to be taken from one side of an object. This x-ray backscatter imaging technique offers many advantages over conventional transmission radiography that include single-sided access and extremely low radiation fields compared to conventional open source industrial radiography. Examples of some applications include the detection of corrosion, foreign object debris, water intrusion, cracking, impact damage and leak detection in a variety of material such as aluminum, composites, honeycomb structures, and titanium.

  1. All-optoelectronic continuous wave THz imaging for biomedical applications.

    PubMed

    Siebert, Karsten J; Löffler, Torsten; Quast, Holger; Thomson, Mark; Bauer, Tobias; Leonhardt, Rainer; Czasch, Stephanie; Roskos, Hartmut G

    2002-11-01

    We present an all-optoelectronic THz imaging system for ex vivo biomedical applications based on photomixing of two continuous-wave laser beams using photoconductive antennas. The application of hyperboloidal lenses is discussed. They allow for f-numbers less than 1/2 permitting better focusing and higher spatial resolution compared to off-axis paraboloidal mirrors whose f-numbers for practical reasons must be larger than 1/2. For a specific histological sample, an analysis of image noise is discussed. PMID:12452562

  2. Tailored liquid crystal devices for specific imaging applications

    NASA Astrophysics Data System (ADS)

    Safrani, A.; Abuleil, M.; Isaac, S.; Solodar, A.; Klapp, I.; Kirzhner, M. G.; Abdulhalim, I.

    2014-10-01

    Following the mature liquid crystals (LCs) display technology, there is a significant interest in implementing these devices into other non-display applications. Hence the emerging field of LC photonics is becoming increasingly active in which the strong electrooptic properties of LCs are harnessed for these applications particularly for imaging such as the use of SLMs, tunable focus lenses, tunable filters and polarization control devices. In this paper we review our recently developed LC devices integrated into full field optical coherence tomography system, into multi-spectral skin diagnosis system and in extended depth of focus imaging system.

  3. Third Conference on Artificial Intelligence for Space Applications, part 1

    NASA Technical Reports Server (NTRS)

    Denton, Judith S. (compiler); Freeman, Michael S. (compiler); Vereen, Mary (compiler)

    1987-01-01

    The application of artificial intelligence to spacecraft and aerospace systems is discussed. Expert systems, robotics, space station automation, fault diagnostics, parallel processing, knowledge representation, scheduling, man-machine interfaces and neural nets are among the topics discussed.

  4. 18 CFR 705.3 - Application of this part.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...3 Conservation of Power and Water Resources WATER RESOURCES COUNCIL NONDISCRIMINATION...PROGRAMS-EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964 § 705.3 Application...under a law administered by the Water Resources Council. It applies...

  5. 18 CFR 705.3 - Application of this part.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...3 Conservation of Power and Water Resources WATER RESOURCES COUNCIL NONDISCRIMINATION...PROGRAMS-EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964 § 705.3 Application...under a law administered by the Water Resources Council. It applies...

  6. 18 CFR 705.3 - Application of this part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...3 Conservation of Power and Water Resources WATER RESOURCES COUNCIL NONDISCRIMINATION...PROGRAMS-EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964 § 705.3 Application...under a law administered by the Water Resources Council. It applies...

  7. 18 CFR 705.3 - Application of this part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...3 Conservation of Power and Water Resources WATER RESOURCES COUNCIL NONDISCRIMINATION...PROGRAMS-EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964 § 705.3 Application...under a law administered by the Water Resources Council. It applies...

  8. 18 CFR 705.3 - Application of this part.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...3 Conservation of Power and Water Resources WATER RESOURCES COUNCIL NONDISCRIMINATION...PROGRAMS-EFFECTUATION OF TITLE VI OF THE CIVIL RIGHTS ACT OF 1964 § 705.3 Application...under a law administered by the Water Resources Council. It applies...

  9. 17 CFR 287.1 - Applicability of this part.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...REGULATIONS PURSUANT TO SECTION 11(a) OF THE ASIAN DEVELOPMENT BANK ACT § 287.1 Applicability...Securities and Exchange Commission by the Asian Development Bank pursuant to section 11(a) of the Asian Development Bank...

  10. 17 CFR 287.1 - Applicability of this part.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...REGULATIONS PURSUANT TO SECTION 11(a) OF THE ASIAN DEVELOPMENT BANK ACT § 287.1 Applicability...Securities and Exchange Commission by the Asian Development Bank pursuant to section 11(a) of the Asian Development Bank...

  11. 17 CFR 287.1 - Applicability of this part.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...REGULATIONS PURSUANT TO SECTION 11(a) OF THE ASIAN DEVELOPMENT BANK ACT § 287.1 Applicability...Securities and Exchange Commission by the Asian Development Bank pursuant to section 11(a) of the Asian Development Bank...

  12. 17 CFR 287.1 - Applicability of this part.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...REGULATIONS PURSUANT TO SECTION 11(a) OF THE ASIAN DEVELOPMENT BANK ACT § 287.1 Applicability...Securities and Exchange Commission by the Asian Development Bank pursuant to section 11(a) of the Asian Development Bank...

  13. 17 CFR 287.1 - Applicability of this part.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...REGULATIONS PURSUANT TO SECTION 11(a) OF THE ASIAN DEVELOPMENT BANK ACT § 287.1 Applicability...Securities and Exchange Commission by the Asian Development Bank pursuant to section 11(a) of the Asian Development Bank...

  14. Chemical Applications of Graph Theory: Part II. Isomer Enumeration.

    ERIC Educational Resources Information Center

    Hansen, Peter J.; Jurs, Peter C.

    1988-01-01

    Discusses the use of graph theory to aid in the depiction of organic molecular structures. Gives a historical perspective of graph theory and explains graph theory terminology with organic examples. Lists applications of graph theory to current research projects. (ML)

  15. Molecular diversity of hydroxamic acids: part II. Potential therapeutic applications.

    PubMed

    Lou, Boliang; Yang, Kexin

    2003-09-01

    A hydroxamic acid moiety has been demonstrated as the key structural element in many highly potent and selective inhibitors against a variety of metalloprotease enzymes, such as MMPs, TACE, HDAC, PDF, etc. Over the last several years, there has been a rapid growth of literature and patent applications dealing with the development of the hydroxamic acid-based inhibitors. This review highlights the most recent examples to show their potential therapeutic applications. PMID:12871163

  16. Solar energy scenarios in Brazil. Part two: Photovoltaics applications

    Microsoft Academic Search

    F. R. Martins; R. Rüther; E. B. Pereira; S. L. Abreu

    2008-01-01

    This paper discusses some energy scenarios for photovoltaic applications in Brazil engendered by using SWERA database in order to demonstrate its potential for feasibility analysis and application in the energy planning for electricity generation. It discusses two major different markets: hybrid PV–Diesel installations in mini-grids of the off-grid Brazilian electricity system in the Amazon region, and grid-connected PV in urban

  17. Simple 3D laser scanner for anatomical parts and image reconstruction from unorganized range data

    Microsoft Academic Search

    G. Tognola; M. Parazzini; P. Ravazzani; F. Grandori; C. Svelto

    2002-01-01

    A simple method for direct acquisition of a cloud of points from an object surface is presented together with a novel surface reconstruction algorithm to obtain an explicit 3D model for the measured object This technique is aimed at relatively accurate as well as simple and reliable 3D reconstruction of anatomical parts for biomedical applications. A prototype 3D scanning system

  18. Direct sight imaging spectrograph: a unique add-on component brings spectral imaging to industrial applications

    NASA Astrophysics Data System (ADS)

    Hyvarinen, Timo S.; Herrala, Esko; Dall'Ava, Alberto

    1998-04-01

    Imaging spectrometry has mainly been a research tool, employing laboratory spectrographs and scientific cameras. This paper describes an add-on imaging spectrography that provides a unique combination of high quality image in a small, rugged, industrial, easy-to-use component. The spectrograph is based on a prism/grating/prism dispersing element which provides straight optical axis, astigmatism free image and polarization independent throughput. A volume holographic transmission grating is used for high efficiency. The tubular optomechanical construction of the spectrography is stable and small, D30 X L110 mm with F/2.8 numerical aperture and 2/3 inch image size. Equipped with C-mounts, the spectrography plugs between lens and area camera, converting the camera to a spectral line imaging system. The spectrograph allows the utilization of rapidly developing monochrome camera techniques, like high speed digital cameras, smart cameras and CMOS sensors, in color and spectral analytical applications. It is the first component available for upgrading existing industrial monochrome vision systems with color/spectral capability without the need to change the basic platform hardware and software. The spectrograph brings the accuracy of spectral colorimetry to industrial vision and overcomes the complex calibration that is needed when an RGB color camera is applied to colorimetric applications. Other applications include NIR imaging, spectral microscopy, multichannel fiberoptics spectroscopy and remote sensing.

  19. A geometrical defect detection method for non-silicon MEMS part based on HU moment invariants of skeleton image

    NASA Astrophysics Data System (ADS)

    Cheng, Xu; Jin, Xin; Zhang, Zhijing; Lu, Jun

    2014-01-01

    In order to improve the accuracy of geometrical defect detection, this paper presented a method based on HU moment invariants of skeleton image. This method have four steps: first of all, grayscale images of non-silicon MEMS parts are collected and converted into binary images, secondly, skeletons of binary images are extracted using medialaxis- transform method, and then HU moment invariants of skeleton images are calculated, finally, differences of HU moment invariants between measured parts and qualified parts are obtained to determine whether there are geometrical defects. To demonstrate the availability of this method, experiments were carried out between skeleton images and grayscale images, and results show that: when defects of non-silicon MEMS part are the same, HU moment invariants of skeleton images are more sensitive than that of grayscale images, and detection accuracy is higher. Therefore, this method can more accurately determine whether non-silicon MEMS parts qualified or not, and can be applied to nonsilicon MEMS part detection system.

  20. Infrared photothermal imaging for standoff detection applications

    NASA Astrophysics Data System (ADS)

    Kendziora, C. A.; Jones, Robert M.; Furstenberg, Robert; Papantonakis, Michael; Nguyen, Viet; McGill, R. Andrew

    2012-06-01

    We are developing a technique for the stand-off detection of trace analytes and residues (explosives, hazardous chemicals, drugs, etc.) using photo-thermal infrared imaging spectroscopy (PT-IRIS). Herein, we refer to this technique as "RED" for "Remote Explosives Detection" or "Resonance Enhanced Detection". This approach leverages recent developments in critical enabling micro and nano-technology components. The first component, a compact IR quantum cascade laser (QCL), is tuned to fundamental absorption bands in the analytes and directed to illuminate a surface of interest. The second component, an IR focal plane array (FPA), is used to image the surface and detect any small increase in the thermal emission upon laser illumination. We have demonstrated the technique at up to 30 meters of stand-off distance indoors and in field tests, while operating the lasers below the eye-safe intensity limit (100 mW/cm2). In this manuscript we detail several recent improvements to the method and system, as well as some recent results for explosives on complex substrates such as car panels and fabrics. We also introduce a computational framework for modeling and simulating the optical and thermal phenomena associated with the photothermal process.

  1. A new AS-display as part of the MIRO lightweight robot for surgical applications

    NASA Astrophysics Data System (ADS)

    Grossmann, Christoph M.

    2010-02-01

    The DLR MIRO is the second generation of versatile robot arms for surgical applications, developed at the Institute for Robotics and Mechatronics at Deutsche Zentrum für Luft- und Raumfahrt (DLR) in Oberpfaffenhofen, Germany. With its low weight of 10 kg and dimensions similar to those of the human arm, the MIRO robot can assist the surgeon directly at the operating table where space is scarce. The planned scope of applications of this robot arm ranges from guiding a laser unit for the precise separation of bone tissue in orthopedics to positioning holes for bone screws, robot assisted endoscope guidance and on to the multi-robot concept for endoscopic minimally invasive surgery. A stereo-endoscope delivers two full HD video streams that can even be augmented with information, e.g vectors indicating the forces that act on the surgical tool at any given moment. SeeFront's new autostereoscopic 3D display SF 2223, being a part of the MIRO assembly, will let the surgeon view the stereo video stream in excellent quality, in real time and without the need for any viewing aids. The presentation is meant to provide an insight into the principles at the basis of the SeeFront 3D technology and how they allow the creation of autostereoscopic display solutions ranging from smallest "stamp-sized" displays to 30" desktop versions, which all provide comfortable freedom of movement for the viewer along with excellent 3D image quality.

  2. 10 CFR Appendix A to Part 600 - Generally Applicable Requirements

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...of 1968, as amended (42 U.S.C. 4151 et seq. ). National Environmental Policy...1969, as amended (42 U.S.C. 4321 et seq. ), 40 CFR part 1500, as implemented...Control Act of 1972 (33 U.S.C. 1251 et seq. ); Executive Order 11738,...

  3. 10 CFR Appendix A to Part 600 - Generally Applicable Requirements

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...of 1968, as amended (42 U.S.C. 4151 et seq. ). National Environmental Policy...1969, as amended (42 U.S.C. 4321 et seq. ), 40 CFR part 1500, as implemented...Control Act of 1972 (33 U.S.C. 1251 et seq. ); Executive Order 11738,...

  4. 10 CFR Appendix A to Part 600 - Generally Applicable Requirements

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...of 1968, as amended (42 U.S.C. 4151 et seq. ). National Environmental Policy...1969, as amended (42 U.S.C. 4321 et seq. ), 40 CFR part 1500, as implemented...Control Act of 1972 (33 U.S.C. 1251 et seq. ); Executive Order 11738,...

  5. Advanced artificial dielectric materials for millimeter wavelength applications, part A

    NASA Astrophysics Data System (ADS)

    Jacobs, Israel S.

    1989-11-01

    This is Part A of a two-part Final Technical Report and is restricted to essentially non-magnetic composite dielectrics. Part B, which contains classified material, treats magneto-dielectric composites. We study the electromagnetic properties (permeability and permittivity) of artificial dielectrics with metal particles (1 micrometer to 37 micrometers) randomly loaded into both polymeric and inorganic binders. The alloy powder particles are oxide-coated for isolation (non-percolating) and ferromagnetic only below room temperature for volume loading determination, p. Samples with p from 0.1 to 0.4 for various size fractions, were examined from about 1 GHz to 20 GHz, and for selected samples at 35 GHz and 90 GHz. The complex permeability results are in very good agreement with calculations of induced magnetic dipole effects as functions of frequency and particle diameter. Permittivity results (real parts) are independent of particle diameter and essentially constant with frequency. Their dependence on loading is compared to the Clausius-Mossotti dipolar calculation, to the lattice array models with higher-order multipole interactions pioneered by Rayleigh, as well as to a pair-interaction model developed in this study; and also to an empirical curve obtained from several remarkably ideal experiments. The latter two comparisons are rather successful when the particles are closely spherical.

  6. Application of functional safety on railways part II: Software development

    Microsoft Academic Search

    Ugur Yildirim; Mustafa Seckin Durmus; Mehmet Turan Soylemez

    2011-01-01

    As well as modelling & designing part, software development process is another major process in development of railway signalization systems. Early mechanical railway interlocking systems do not need such software development processes where all train traffic is controlled directly from signalboxes via mechanical tools and signalmen. Along with rising train speeds and densities the need of reliable and safe signalization

  7. 49 CFR 821.2 - Applicability and description of part.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...this part also govern all proceedings on appeal from an order of the Administrator imposing a civil penalty on a flight engineer, mechanic, pilot or repairman, or a person acting in such capacity. All proceedings on appeal to the Board from any...

  8. 49 CFR 821.2 - Applicability and description of part.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...part also govern all proceedings on appeal from an order of the Administrator imposing a civil penalty on a flight engineer, mechanic, pilot or repairman, or a person acting in such capacity. All proceedings on appeal to the Board from any initial...

  9. Object density-based image segmentation and its applications in biomedical image analysis.

    PubMed

    Yu, Jinhua; Tan, Jinglu

    2009-12-01

    In many applications of medical image analysis, the density of an object is the most important feature for isolating an area of interest (image segmentation). In this research, an object density-based image segmentation methodology is developed, which incorporates intensity-based, edge-based and texture-based segmentation techniques. The proposed method consists of three main stages: preprocessing, object segmentation and final segmentation. Image enhancement, noise reduction and layer-of-interest extraction are several subtasks of preprocessing. Object segmentation utilizes a marker-controlled watershed technique to identify each object of interest (OI) from the background. A marker estimation method is proposed to minimize over-segmentation resulting from the watershed algorithm. Object segmentation provides an accurate density estimation of OI which is used to guide the subsequent segmentation steps. The final stage converts the distribution of OI into textural energy by using fractal dimension analysis. An energy-driven active contour procedure is designed to delineate the area with desired object density. Experimental results show that the proposed method is 98% accurate in segmenting synthetic images. Segmentation of microscopic images and ultrasound images shows the potential utility of the proposed method in different applications of medical image processing. PMID:19473717

  10. In vivo 783-channel diffuse reflectance imaging system and its application

    NASA Astrophysics Data System (ADS)

    Yang, Joon-Mo; Han, Yong-Hui; Yoon, Gilwon; Ahn, Byung Soo; Lee, Byung-Cheon; Soh, Kwang-Sup

    2007-08-01

    A fiber-based reflectance imaging system was constructed to produce in vivo absorption spectroscopic images of biological tissues with diffuse light in the cw domain. The principal part of this system is the 783-channel fiber probe, composed of 253 illumination fibers and 530 detection fibers distributed in a 20×20 mm square region. During illumination with the 253 illumination fibers, diffuse reflected lights are collected by the 530 detection fibers and recorded simultaneously as an image with an electron multiplying CCD camera for fast data acquisition. After signal acquisition, a diffuse reflectance image was reconstructed by applying the spectral normalization method we devised. To test the applicability of the spectral normalization, we conducted two phantom experiments with chicken breast tissue and white Delrin resin by using animal blood as an optical inhomogeneity. In the Delrin phantom experiment, we present images produced by two methods, spectral normalization and reference signal normalization, along with a comparison of the two. To show the feasibility of our system for biomedical applications, we took images of a human vein in vivo with the spectral normalization method.

  11. All-optoelectronic continuous wave THz imaging for biomedical applications

    Microsoft Academic Search

    Karsten J. Siebert; Torsten Löffler; Holger Quast; Mark Thomson; Tobias Bauer; Rainer Leonhardt; Stephanie Czasch; Hartmut G. Roskos

    2002-01-01

    We present an all-optoelectronic THz imaging system for ex vivo biomedical applications based on photomixing of two continuous-wave laser beams using photoconductive antennas. The application of hyperboloidal lenses is discussed. They allow for f-numbers less than 1\\/2 permitting better focusing and higher spatial resolution compared to off-axis paraboloidal mirrors whose f-numbers for practical reasons must be larger than 1\\/2. For

  12. An imaging spectrometer for microgravity application

    NASA Technical Reports Server (NTRS)

    Wong, Wallace K.

    1995-01-01

    Flame structure is the result of complex interaction of mechanisms operating in both unwanted fires and controlled combustion systems. The scientific study of gas-jet diffusion flames in reduced-gravity environment is of interest because the effects of buoyancy on flow entrainment and acceleration are lessened. Measurements of flames have been restricted to cinematography, thermocouples, and radiometers. SSG, Inc. is developing an MWIR imaging spectrometer (MIS) for microgravity flame measurements. The device will be delivered to NASA Lewis at the end of this project to demonstrate flame measurements in the laboratory. With proper modifications, the MIS can be used to monitor a gas-jet flame under microgravity on a NASA Learjet or DC-9.

  13. Applications of cell imaging in Salmonella research.

    PubMed

    Perrett, Charlotte A; Jepson, Mark A

    2007-01-01

    Salmonella enterica is a Gram-negative enteropathogen that can cause localized infections, typically resulting in gastroenteritis, or systemic infection, e.g., typhoid fever, in both humans and warm-blooded animals. Understanding the mechanisms by which Salmonella induce disease has been the focus of intensive research. This has revealed that Salmonella invasion requires dynamic cross-talk between the microbe and host cells, in which bacterial adherence rapidly leads to a complex sequence of cellular responses initiated by proteins translocated into the host cell by a type III secretion system (T3SS). Once these Salmonella-induced responses have resulted in bacterial invasion, proteins translocated by a second T3SS initiate further modulation of cellular activities to enable survival and replication of the invading pathogen. These processes contribute to Salmonella entry into the host and the clinical symptoms of gastrointestinal and systemic infection. Elucidation of the complex and highly dynamic pathogen-host interactions ultimately requires analysis at the level of single cells and single infection events. To achieve this goal, researchers have applied a diverse range of microscopical methods to examine Salmonella infection in models ranging from whole animal to isolated cells and simple eukaryotic organisms. For example, electron microscopy and confocal microscopy can reveal the juxtaposition of Salmonella, its products, and cellular components at high resolution. Simple light microscopy (LM) can also be used to investigate the interaction of bacteria with host cells and has advantages for live cell imaging, which enables detailed analysis of the dynamics of infection and cellular responses. Here we review the use of imaging techniques in Salmonella research and compare the capabilities of different classes of microscope to address specific types of research question. We also provide protocols and notes on several LM techniques routinely used in our own research. PMID:18363239

  14. Driving micro-optical imaging systems towards miniature camera applications

    NASA Astrophysics Data System (ADS)

    Brückner, Andreas; Duparré, Jacques; Dannberg, Peter; Leitel, Robert; Bräuer, Andreas

    2010-05-01

    Up to now, multi channel imaging systems have been increasingly studied and approached from various directions in the academic domain due to their promising large field of view at small system thickness. However, specific drawbacks of each of the solutions prevented the diffusion into corresponding markets so far. Most severe problems are a low image resolution and a low sensitivity compared to a conventional single aperture lens besides the lack of a cost-efficient method of fabrication and assembly. We propose a microoptical approach to ultra-compact optics for real-time vision systems that are inspired by the compound eyes of insects. The demonstrated modules achieve a VGA resolution with 700x550 pixels within an optical package of 6.8mm x 5.2mm and a total track length of 1.4mm. The partial images that are separately recorded within different optical channels are stitched together to form a final image of the whole field of view by means of image processing. These software tools allow to correct the distortion of the individual partial images so that the final image is also free of distortion. The so-called electronic cluster eyes are realized by state-of-the-art microoptical fabrication techniques and offer a resolution and sensitivity potential that makes them suitable for consumer, machine vision and medical imaging applications.

  15. Applications of laser wakefield accelerators for biomedical imaging

    NASA Astrophysics Data System (ADS)

    Najmudin, Zulfikar

    2014-10-01

    Laser-wakefield accelerators driven by high-intensity short-pulse lasers are a proven compact source of high-energy electron beams, with energy gains of ~GeV energy in centimetres of plasma demonstrated. One of the main proposed applications for these accelerators is to drive synchrotron light sources, in particular for x-ray applications. It has also been shown that the same plasma accelerator can also act as a wigglers, capable of the production of high brightness and spatially coherent hard x-ray beams. In this latest work, we demonstrate the application of these unique light-sources for biological and medical applications. The experiments were performed with the Astra Gemini laser at the Rutherford Appleton Laboratory in the UK. Gemini produces laser pulses with energy exceeding 10 J in pulse lengths down to 40 fs. A long focal length parabola (f / 20) is used to focus the laser down to a spot of size approximately 25 ? m (fwhm) into a gas-cell of variable length. Electrons are accelerated to energies up to 1 GeV and a bright beam of x-rays is observed simultaneously with the accelerated beam. The length of the gas cell was optimised to produce high contrast x-ray images of radiographed test objects. This source was then used for imaging a number of interesting medical and biological samples. Full tomographic imaging of a human trabecular bone sample was made with resolution easily exceeding the ~100 ?m level required for CT applications. Phase-contrast imaging of human prostrate and mouse neonates at the micron level was also demonstrated. These studies indicate the usefulness of these sources in research and clinical applications. They also show that full 3D imaging can be made possible with this source in a fraction of the time that it would take with a corresponding x-ray tube. The JAI is funded by STFC Grant ST/J002062/1.

  16. Production Strategies for Production-Quality Parts for Aerospace Applications

    NASA Technical Reports Server (NTRS)

    Cawley, J. D.; Best, J. E.; Liu, Z.; Eckel, A. J.; Reed, B. D.; Fox, D. S.; Bhatt, R.; Levine, Stanley R. (Technical Monitor)

    2000-01-01

    A combination of rapid prototyping processes (3D Systems' stereolithography and Sanders Prototyping's ModelMaker) are combined with gelcasting to produce high quality silicon nitride components that were performance tested under simulated use conditions. Two types of aerospace components were produced, a low-force rocket thruster and a simulated airfoil section. The rocket was tested in a test stand using varying mixtures of H2 and O2, whereas the simulated airfoil was tested by subjecting it to a 0.3 Mach jet-fuel burner flame. Both parts performed successfully, demonstrating the usefulness of the rapid prototyping in efforts to effect materials substitution. In addition, the simulated airfoil was used to explore the possibility of applying thermal/environmental barrier coatings and providing for internal cooling of ceramic parts. It is concluded that this strategy for processing offers the ceramic engineer all the flexibility normally associated with investment casting of superalloys.

  17. IGSTK: Framework and example application using an open source toolkit for image-guided surgery applications

    NASA Astrophysics Data System (ADS)

    Cheng, Peng; Zhang, Hui; Kim, Hee-su; Gary, Kevin; Blake, M. Brian; Gobbi, David; Aylward, Stephen; Jomier, Julien; Enquobahrie, Andinet; Avila, Rick; Ibanez, Luis; Cleary, Kevin

    2006-03-01

    Open source software has tremendous potential for improving the productivity of research labs and enabling the development of new medical applications. The Image-Guided Surgery Toolkit (IGSTK) is an open source software toolkit based on ITK, VTK, and FLTK, and uses the cross-platform tools CMAKE and DART to support common operating systems such as Linux, Windows, and MacOS. IGSTK integrates the basic components needed in surgical guidance applications and provides a common platform for fast prototyping and development of robust image-guided applications. This paper gives an overview of the IGSTK framework and current status of development followed by an example needle biopsy application to demonstrate how to develop an image-guided application using this toolkit.

  18. Implantable CMOS imaging devices for bio-medical applications

    Microsoft Academic Search

    Jun Ohta

    2011-01-01

    This paper reviews recent results for implantable CMOS imaging devices applied to biomedical applications. The topics include retinal prosthesis devices and deep-brain implantation devices for small animals. Device structures and their characteristics are described, and the results of in vivo experiments are demonstrated.

  19. The generalized Fibonacci transformations and application to image scrambling

    Microsoft Academic Search

    Jiancheng Zou; Rabab K. Ward; Dongxu Qi

    2004-01-01

    This paper introduces a subfamily of the generalized Fibonacci sequence family, which we call the distinguished generalized Fibonacci sequence. Two members of this subfamily, the Fibonacci sequence and the Lucas sequence, are considered and two transformations, based on these sequences, are introduced. The applications of these transformations to image scrambling are studied in detail. It is found that these transformations

  20. Integer lapped transforms and their applications to image coding

    Microsoft Academic Search

    W. C. Fong; Shing-chow Chan; Arumugam Nallanathan; Ka-leung Ho

    2002-01-01

    This paper proposes new integer approximations of the lapped transforms, called the integer lapped transforms (ILT), and studies their applications to image coding. The ILT are derived from a set of orthogonal sinusoidal transforms having short integer coefficients, which can be implemented with simple integer arithmetic. By employing the same scaling constants in these integer sinusoidal transforms, integer versions of

  1. Application of Image Reconstruction Techniques to Mars Neutron Spectroscopy Data

    E-print Network

    Salvaggio, Carl

    Application of Image Reconstruction Techniques to Mars Neutron Spectroscopy Data Meredith Curtis by the Mars Odyssey Neutron Spectrometer contain artifacts from spatial blurring and noise, which are limiting simulated and measured data sets. These techniques were applied to global reconstruction of the Mars neutron

  2. A Sequential Learning Resource Allocation Network for Image Processing Applications

    Microsoft Academic Search

    Stefan Wildermann; Jürgen Teich

    2008-01-01

    Online adaptation is a key requirement for image processing applications when used in dynamic environments. In contrast to batch learning, where retraining is required each time a new observation occurs, sequential learning algorithms offer the ability to iteratively adapt the existing classifier. In this paper, we present a neural network architecture and a fast online learning algorithm that allow to

  3. On structured sparsity and selected applications in tomographic imaging

    E-print Network

    Pizurica, Aleksandra

    , including X-Ray Computerized Tomography (CT).6 Some recent works addressed the application of CS) models and employ it within Magnetic Resonance Imaging (MRI) and Quantitative Microwave Tomography. We, but with a number of differences. In case of Microwave Tomography, we give another interpretation of structured

  4. A Low-Cost Imaging System for Aerial Applicators

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Agricultural aircraft provide a readily available and versatile platform for airborne remote sensing. Although various airborne imaging systems are being used for research and commercial applications, most of these systems are either too expensive or too complex to be of practical use for aerial app...

  5. Boolean Derivatives With Application to Edge Detection for Imaging Systems

    Microsoft Academic Search

    Sos S. Agaian; Karen A. Panetta; Shahan C. Nercessian; Ethan E. Danahy

    2010-01-01

    This paper introduces a new concept of Boolean derivatives as a fusion of partial derivatives of Boolean functions (PDBFs). Three efficient algorithms for the calculation of PDBFs are presented. It is shown that Boolean function derivatives are useful for the application of identifying the location of edge pixels in binary images. The same concept is extended to the development of

  6. Crosshole IP imaging for engineering and environmental applications

    Microsoft Academic Search

    Andreas Kemna; Andrew Binley; Lee Slater

    2004-01-01

    Induced polarization (IP) imaging is a promising tool in engineering and environmental studies. Application of this technique for near-surface investigations has pre- viously been limited by incomplete understanding of the physicochemical controls on the IP response, together with a lack of appropriate methods for data inversion. As laboratory studies have shown, description of IP in terms of complex electrical conductivity

  7. Metamaterials for threat reduction applications: imaging, signal processing, and cloaking

    E-print Network

    Metamaterials for threat reduction applications: imaging, signal processing, and cloaking R. D structured materials, termed metamaterials (MM), has dramati- cally expanded our view of electromagnetic with metamaterials provides a promising approach--from a device perspective--towards fill- ing this gap

  8. Multiresolution Hadamard Representation and Its Applications to Document Image Analysis

    E-print Network

    Chen, Sheng-Wei

    Multiresolution Hadamard Representation and Its Applications to Document Image Analysis Kung. In this paper, a special class of the wavelet transform, referred to as the multiresolution Hadamard character can be extracted easily. This multiresolution analysis provides a means to reveal the size

  9. SPECTROPHOTOMETRIC INTRACUTANEOUS IMAGING (SIASCOPY): METHOD AND CLINICAL APPLICATIONS

    E-print Network

    Claridge, Ela

    a preferred tool for the diagnosis of pigmented skin lesions and early melanoma detection. Other applications an advanced melanoma and a set of SIAgraphs showing the concentration of dermal and epidermal melanin, blood and interpretation of the maps is given in section 5.1. Figure 1. (a) A colour image of a melanoma together

  10. Microbolometer uncooled thermal imaging sensors for law enforcement applications

    Microsoft Academic Search

    Burton D. Figler

    2001-01-01

    In this paper we will describe advances in microbolometer uncooled thermal imaging sensor technology as they apply to law enforcement applications. Improvements in sensor performance that will be described include: (1) reduced pixel pitch, (2) increased spatial resolution, (3) increased thermal sensitivity, (4) reduced electrical power, and (5) reduced size. Since cost considerations dominate many, if not most, potential law

  11. Hemispherical Harmonic Surface Description and Applications to Medical Image Analysis

    E-print Network

    Huang, Heng

    Hemispherical Harmonic Surface Description and Applications to Medical Image Analysis Heng Huang Lebanon, NH 03756 Abstract The use of surface harmonics for rigid and nonrigid shape description is well known. In this paper we define a set of complete hemispherical harmonic basis functions on a hemisphere

  12. Biomedical Applications of NMR Imaging and Diffusion Studies

    E-print Network

    Walsworth, Ronald L.

    ; Hyperpolarized noble gas; Hyperpolarized 129 Xe MRI; PGSE technique; Gas diffusion; Restricted diffusion; PorousBiomedical Applications of NMR Imaging and Diffusion Studies Using Thermal And Hyperpolarized Xenon Studies Using Thermal And Hyperpolarized Xenon by Sameer Anil Sheth Submitted to the Department of Physics

  13. Applications of nuclear magnetic resonance imaging in process engineering

    NASA Astrophysics Data System (ADS)

    Gladden, Lynn F.; Alexander, Paul

    1996-03-01

    During the past decade, the application of nuclear magnetic resonance (NMR) imaging techniques to problems of relevance to the process industries has been identified. The particular strengths of NMR techniques are their ability to distinguish between different chemical species and to yield information simultaneously on the structure, concentration distribution and flow processes occurring within a given process unit. In this paper, examples of specific applications in the areas of materials and food processing, transport in reactors and two-phase flow are discussed. One specific study, that of the internal structure of a packed column, is considered in detail. This example is reported to illustrate the extent of new, quantitative information of generic importance to many processing operations that can be obtained using NMR imaging in combination with image analysis.

  14. Application of tomographic imaging to stability assessment

    SciTech Connect

    Maleki, Hamid [Maleki Technologies, Inc., Spokane, WA (United States); Johnston, J. [Department of Energy, Spokane, WA (United States)

    1996-12-01

    Roof falls are one of the leading ground control problems that adversely influence productivity and worker safety in underground mines, constriction sites, and nuclear waste repositories. To control roof stability problems, the operator needs to have practical methods for measuring changes in strata conditions and criteria for defining the timing of secondary support installation. The objective of this study was to develop measurement techniques and criteria for assessing roof conditions at the mining face. An integrated rock deformation and tomographic imaging method was developed and amplified at two sites in a western U.S. trona mine. It was shown that rock damage occurred at a deformation of 30 to 60 mm (1.2 to 2.4 in) (2 to 4 pct strain) and was associated with a significant (16 pct) reduction in wave velocity. Thus, supplementary support may be installed when there is a measured change in wave velocity of at least 16 pct. Tomographic measurements can be obtained in rocks rapidly, thus providing a powerful tool for analyzing growth of failure and for installing supplementary support systems in a timely manner.

  15. Landsat image registration for agricultural applications

    NASA Technical Reports Server (NTRS)

    Wolfe, R. H., Jr.; Juday, R. D.; Wacker, A. G.; Kaneko, T.

    1982-01-01

    An image registration system has been developed at the NASA Johnson Space Center (JSC) to spatially align multi-temporal Landsat acquisitions for use in agriculture and forestry research. Working in conjunction with the Master Data Processor (MDP) at the Goddard Space Flight Center, it functionally replaces the long-standing LACIE Registration Processor as JSC's data supplier. The system represents an expansion of the techniques developed for the MDP and LACIE Registration Processor, and it utilizes the experience gained in an IBM/JSC effort evaluating the performance of the latter. These techniques are discussed in detail. Several tests were developed to evaluate the registration performance of the system. The results indicate that 1/15-pixel accuracy (about 4m for Landsat MSS) is achievable in ideal circumstances, sub-pixel accuracy (often to 0.2 pixel or better) was attained on a representative set of U.S. acquisitions, and a success rate commensurate with the LACIE Registration Processor was realized. The system has been employed in a production mode on U.S. and foreign data, and a performance similar to the earlier tests has been noted.

  16. Magnetic resonance imaging for prostate cancer clinical application

    PubMed Central

    Li, Bing; Du, Yong; Huang, Yayong; Meng, Jun; Xiao, Dongmei

    2013-01-01

    As prostate cancer is a biologically heterogeneous disease for which a variety of treatment options are available, the major objective of prostate cancer imaging is to achieve more precise disease characterization. In clinical practice, magnetic resonance imaging (MRI) is one of the imaging tools for the evaluation of prostate cancer, the fusion of MRI or dynamic contrast-enhanced MRI (DCE-MRI) with magnetic resonance spectroscopic imaging (MRSI) is improving the evaluation of cancer location, size, and extent, while providing an indication of tumor aggressiveness. This review summarizes the role of MRI in the application of prostate cancer and describes molecular MRI techniques (including MRSI and DCE-MRI) for aiding prostate cancer management. PMID:23592906

  17. EOS Space Systems Wide Field Imager for SSA Applications

    NASA Astrophysics Data System (ADS)

    Ritchie, I.; Blundell, M.; Smith, C.

    2013-09-01

    EOS Space Systems (EOSSS) has designed and manufactured space surveillance imagers since 1999. From early adaptations of Celestron Nexstar tubes to use ICCD sensors, to current EMCCD sensors in custom designed optical assemblies, the company has been required to seek the widest fields possible on a systems small enough to ride on a larger telescope OTA. The latest 14 inch (350mm) variant uses f0.75 corrected optics to achieve real time (2 second) imaging to visual magnitude 16 or fainter, and fields of view up to 3 degrees given the appropriate image plane size. With mass of only 50 kg and up to 1 Mpix 14 bit sampling, this imager has many potential SSA applications.

  18. Handheld multispectral fluorescence lifetime imaging system for in vivo applications.

    PubMed

    Cheng, Shuna; Cuenca, Rodrigo M; Liu, Boang; Malik, Bilal H; Jabbour, Joey M; Maitland, Kristen C; Wright, John; Cheng, Yi-Shing Lisa; Jo, Javier A

    2014-03-01

    There is an increasing interest in the application of fluorescence lifetime imaging (FLIM) for medical diagnosis. Central to the clinical translation of FLIM technology is the development of compact and high-speed clinically compatible systems. We present a handheld probe design consisting of a small maneuverable box fitted with a rigid endoscope, capable of continuous lifetime imaging at multiple emission bands simultaneously. The system was characterized using standard fluorescent dyes. The performance was then further demonstrated by imaging a hamster cheek pouch in vivo, and oral mucosa tissue both ex vivo and in vivo, all using safe and permissible exposure levels. Such a design can greatly facilitate the evaluation of FLIM for oral cancer imaging in vivo. PMID:24688824

  19. Handheld multispectral fluorescence lifetime imaging system for in vivo applications

    PubMed Central

    Cheng, Shuna; Cuenca, Rodrigo M.; Liu, Boang; Malik, Bilal H.; Jabbour, Joey M.; Maitland, Kristen C.; Wright, John; Cheng, Yi-Shing Lisa; Jo, Javier A.

    2014-01-01

    There is an increasing interest in the application of fluorescence lifetime imaging (FLIM) for medical diagnosis. Central to the clinical translation of FLIM technology is the development of compact and high-speed clinically compatible systems. We present a handheld probe design consisting of a small maneuverable box fitted with a rigid endoscope, capable of continuous lifetime imaging at multiple emission bands simultaneously. The system was characterized using standard fluorescent dyes. The performance was then further demonstrated by imaging a hamster cheek pouch in vivo, and oral mucosa tissue both ex vivo and in vivo, all using safe and permissible exposure levels. Such a design can greatly facilitate the evaluation of FLIM for oral cancer imaging in vivo. PMID:24688824

  20. Digital Micro-mirror Device-based broadband optical image sensor for robust imaging applications

    NASA Astrophysics Data System (ADS)

    Riza, Nabeel A.; Reza, Syed Azer; Marraccini, Philip J.

    2011-01-01

    To the best of the authors' knowledge, presented for the first time is the design of a robust broadband optical image sensor using a Digital Micro-mirror Device (DMD). Electronic focus control of the imaging lens and full programmability of the spatial sampling aperture shape, size, and location on the DMD plane that mechanically scans the incident incoherent optical irradiance distribution lead to imaging smartness. Dual port single-point photo-detection design provides imaging operation robustness to the global light irradiance variations such as via environmental effects, e.g., moving clouds. As the Texas Instruments (TI) DMD can provide light modulation over 400 nm to 2500 nm wavelengths, visible, Near Infrared (NIR), and Short-Wave Infrared (SWIR) bands can be simultaneously processed to generate three independent band images via three point photo-detectors. A proof-of-concept experiment in the SWIR band at 1580 nm is conducted using an incoherent heart-shaped target that is sampled using the DMD imager set for a 68.4 ?m side square moving pinhole. A 60 × 60 pixel image from the proposed imager produces a 0.94 cross-correlation peak when compared to an optically attenuated heart shape image produced by a near 9 ?m pixel size phosphor coated Charge Coupled Device (CCD) imager. Using the dual-detection method, robust 633 nm visible light imaging of an Air Force (AF) Chart figure is successfully demonstrated for 3 Hz global light fluctuation. Applications for the proposed imager include optical sensing in the fields of astronomy, defense, medicine, and security.

  1. Fractal Images

    NSDL National Science Digital Library

    Math Forum

    2000-01-01

    Fractal images made for the most part using a software application called Flarium24. Galleries contain about 15 images each and should be viewed in hi-color or truecolor settings. Tilable images that can be downloaded?for wallpaper are also available.

  2. Transonic Symposium: Theory, Application, and Experiment, volume 1, part 2

    NASA Technical Reports Server (NTRS)

    Foughner, Jerome T., Jr. (compiler)

    1989-01-01

    In order to assess the state of the art in transonic flow disciplines and to glimpse at future directions, NASA-Langley held a Transonic Symposium. Emphasis was placed on steady, three dimensional external, transonic flow and its simulation, both numerically and experimentally. The symposium included technical sessions on wind tunnel and flight experiments; computational fluid dynamic applications; inviscid methods and grid generation; viscous methods and boundary layer stability; and wind tunnel techniques and wall interference. This, being volume 1, is unclassified.

  3. Applications of Algebraic Geometry to Systems Theory. Part 1

    NASA Technical Reports Server (NTRS)

    Hermann, Robert

    1977-01-01

    Basic theorems of algebraic geometry are applied to prove some pole-placement theorems, including an improved version of pole placement with output feedback. Examples are given which show the limitations of the algebro-geometric theorems and their potential value for systems theory. This paper and those to follow might contribute towards making the powerful theorems of modern algebraic geometry accessible and applicable to problems of engineering.

  4. Texture function application for wood ultrastructure description. Part 1: theory

    Microsoft Academic Search

    Jan Bonarski; Wies?aw Olek

    2006-01-01

    The three-dimensional orientation distribution function (ODF), being a probability of the density of crystallographic orientations,\\u000a is widely used for describing internal arrangement of polycrystalline materials (especially metals and alloys). The application\\u000a of the ODF was enhanced in the paper for the monoclinic crystal symmetry. The algorithm of the crystallographic texture analysis\\u000a based on the arbitrarily defined cells method was presented

  5. Content-based image retrieval systems have become a reliable tool for many image database applications. There

    E-print Network

    Farag, Aly A.

    Abstract Content-based image retrieval systems have become a reliable tool for many image database applications. There are several advantages of the image retrieval techniques compared to other simple retrieval approaches such as text-based retrieval techniques. This paper proposes an image retrieval technique that can

  6. RDTC optimized compression of image-based scene representations (Part II): practical coding.

    PubMed

    Bauermann, Ingo; Steinbach, Eckehard

    2008-05-01

    Interactive streaming of compressed image-based scene representations requires random access to the reference image data. The degree of interframe dependencies exploited during encoding has an impact on the transmission and decoding time and, at the same time, delimits the (storage) rate-distortion (RD) tradeoff that can be achieved. The transmission data rate and the decoding complexity at the client have received attention in the literature, but their incorporation into the optimization procedure for compression and streaming is missing. If scenario-specific measures are considered, the traditional RD optimization can be extended to a tradeoff between the (storage) rate (R), distortion (D), transmission data rate (T), and decoding complexity (C). In the first part of this sequel of papers, we have theoretically analyzed the RDTC space for the compression of densely sampled image-based scene representations. In this second part, we consider practical RDTC optimization. We propose a modeling and encoding parameter selection procedure that allows us to adapt the compression to scenario-specific properties. The impact of client side caching is considered and evaluated using an experimental testbed. Our results show a significant reduction of the user perceived delay, memory consumption or required minimum channel and storage bitrate for RDTC optimized streams compared to classical RD optimized or independently encoded scene representations. PMID:18390377

  7. Workshop on Satellite Meteorology. Part 2; Satellite Image Analysis and Interpretation

    NASA Technical Reports Server (NTRS)

    1982-01-01

    The Workshop on Satellite Meteorology is co-sponsored by the Cooperative Institute for Research in the Atmosphere (CIRA) at Colorado State University and the American Meteorological Society's Committee on Meteorological Aspects of Aerospace Systems. The workshop covers uses of satellite data in atmospheric science. It provides state-of-the-art information to those in Universities, research groups, and other users. One area of primary focus is to provide source material to university personnel for developing and augmenting courses in satellite meteorology and the atmospheric sciences. The items in the program include information on meteorological satellites and data sources, uses of satellite imagery for all scales of weather analysis and forecasting, uses of sounding data and other radiance information and research opportunities on interactive systems. Each session is presented by a group of experts in the field and includes an open discussion of the state-of-the-art and promising areas for future development. This pre-print volume is one of three parts on the workshop. The three parts are: PART I. Satellites and Their Data; PART II. Satellite Image Analysis and Interpretation; PART III. Satellite Soundings and Their Uses.

  8. Bedside ultrasonography-Applications in critical care: Part II

    PubMed Central

    Chacko, Jose; Brar, Gagan

    2014-01-01

    Point of care ultrasonography, performed by acute care physicians, has developed into an invaluable bedside tool providing important clinical information with a major impact on patient care. In Part II of this narrative review, we describe ultrasound guided central venous cannulation, which has become standard of care with internal jugular vein cannulation. Besides improving success rates, real-time guidance also significantly reduces the incidence of complications. We also discuss compression ultrasonography - a quick and effective bedside screening tool for deep vein thrombosis of the lower extremity. Abdominal ultrasound offers vital clues in the emergency setting; in the unstable trauma victim, a focused examination may provide immediate answers and has largely superseded diagnostic peritoneal lavage in diagnosing intraperitoneal bleed. From estimation of intracranial pressure to transcranial Doppler studies, ultrasound is becoming increasingly relevant to neurocritical care. Ultrasound may also help with airway management in several situations, including percutaneous tracheostomy. Clearly, bedside ultrasonography has become an indispensable part of intensive care practice – in the rapid assessment of critically ill-patients as well as in enhancing the safety of invasive procedures. PMID:24987237

  9. Antenna applicator design for microwave imaging of the interior of human breasts

    NASA Astrophysics Data System (ADS)

    Petrovi?, N.; Otterskog, M.; Risman, P. O.

    2014-09-01

    In this paper we introduce a waveguide antenna applicator design intended to be placed on the surface or in close proximity to a human breast for imaging purposes. Hence, the antenna needs to be compact for easy placement. The design process is carefully carried out dividing the antenna applicator into separate parts, allowing closer analysis towards improved synthesis. A mode applicator antenna was concluded to be necessary, employing a TE10 mode type with minimized near-field and surface (Zennek) wave excitation. Numerical simulations have been used throughout and show that the proposed ridged waveguide antenna is capable of fulfilling the design requirements and the performance goals. Modelling has been carried out using a scenario with a simple breast model and confirms the applicator's capability.

  10. Normalized averaging using adaptive applicability functions with applications in image reconstruction from

    E-print Network

    van Vliet, Lucas J.

    uncertainties, it does not take the signal structures into account. In fact, when interpolation of sparselyNormalized averaging using adaptive applicability functions with applications in image reconstruction from sparsely and randomly sampled data Tuan Q. Pham, Lucas J. van Vliet Pattern Recognition Group

  11. Normalized averaging using adaptive applicability functions with application in image reconstruction from

    E-print Network

    van Vliet, Lucas J.

    interpolation of sparsely sampled signals is concerned, the neighborhood's structural content should playNormalized averaging using adaptive applicability functions with application in image reconstruction from sparsely and randomly sampled data Tuan Q. Pham, Lucas J. van Vliet Pattern Recognition Group

  12. Interpretation of Medical Imaging Data with a Mobile Application: A Mobile Digital Imaging Processing Environment

    PubMed Central

    Lin, Meng Kuan; Nicolini, Oliver; Waxenegger, Harald; Galloway, Graham J.; Ullmann, Jeremy F. P.; Janke, Andrew L.

    2013-01-01

    Digital Imaging Processing (DIP) requires data extraction and output from a visualization tool to be consistent. Data handling and transmission between the server and a user is a systematic process in service interpretation. The use of integrated medical services for management and viewing of imaging data in combination with a mobile visualization tool can be greatly facilitated by data analysis and interpretation. This paper presents an integrated mobile application and DIP service, called M-DIP. The objective of the system is to (1) automate the direct data tiling, conversion, pre-tiling of brain images from Medical Imaging NetCDF (MINC), Neuroimaging Informatics Technology Initiative (NIFTI) to RAW formats; (2) speed up querying of imaging measurement; and (3) display high-level of images with three dimensions in real world coordinates. In addition, M-DIP provides the ability to work on a mobile or tablet device without any software installation using web-based protocols. M-DIP implements three levels of architecture with a relational middle-layer database, a stand-alone DIP server, and a mobile application logic middle level realizing user interpretation for direct querying and communication. This imaging software has the ability to display biological imaging data at multiple zoom levels and to increase its quality to meet users’ expectations. Interpretation of bioimaging data is facilitated by an interface analogous to online mapping services using real world coordinate browsing. This allows mobile devices to display multiple datasets simultaneously from a remote site. M-DIP can be used as a measurement repository that can be accessed by any network environment, such as a portable mobile or tablet device. In addition, this system and combination with mobile applications are establishing a virtualization tool in the neuroinformatics field to speed interpretation services. PMID:23847587

  13. Interpretation of medical imaging data with a mobile application: a mobile digital imaging processing environment.

    PubMed

    Lin, Meng Kuan; Nicolini, Oliver; Waxenegger, Harald; Galloway, Graham J; Ullmann, Jeremy F P; Janke, Andrew L

    2013-01-01

    Digital Imaging Processing (DIP) requires data extraction and output from a visualization tool to be consistent. Data handling and transmission between the server and a user is a systematic process in service interpretation. The use of integrated medical services for management and viewing of imaging data in combination with a mobile visualization tool can be greatly facilitated by data analysis and interpretation. This paper presents an integrated mobile application and DIP service, called M-DIP. The objective of the system is to (1) automate the direct data tiling, conversion, pre-tiling of brain images from Medical Imaging NetCDF (MINC), Neuroimaging Informatics Technology Initiative (NIFTI) to RAW formats; (2) speed up querying of imaging measurement; and (3) display high-level of images with three dimensions in real world coordinates. In addition, M-DIP provides the ability to work on a mobile or tablet device without any software installation using web-based protocols. M-DIP implements three levels of architecture with a relational middle-layer database, a stand-alone DIP server, and a mobile application logic middle level realizing user interpretation for direct querying and communication. This imaging software has the ability to display biological imaging data at multiple zoom levels and to increase its quality to meet users' expectations. Interpretation of bioimaging data is facilitated by an interface analogous to online mapping services using real world coordinate browsing. This allows mobile devices to display multiple datasets simultaneously from a remote site. M-DIP can be used as a measurement repository that can be accessed by any network environment, such as a portable mobile or tablet device. In addition, this system and combination with mobile applications are establishing a virtualization tool in the neuroinformatics field to speed interpretation services. PMID:23847587

  14. 9 CFR 51.10 - Part 53 of this chapter not applicable.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...CONTROL AND ERADICATION OF LIVESTOCK OR POULTRY DISEASES ANIMALS DESTROYED BECAUSE OF BRUCELLOSIS Indemnity for Cattle, Bison, and Swine § 51.10 Part 53 of this chapter not applicable. No claim for indemnity for animals destroyed...

  15. 9 CFR 51.10 - Part 53 of this chapter not applicable.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...CONTROL AND ERADICATION OF LIVESTOCK OR POULTRY DISEASES ANIMALS DESTROYED BECAUSE OF BRUCELLOSIS Indemnity for Cattle, Bison, and Swine § 51.10 Part 53 of this chapter not applicable. No claim for indemnity for animals destroyed...

  16. 9 CFR 51.10 - Part 53 of this chapter not applicable.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...CONTROL AND ERADICATION OF LIVESTOCK OR POULTRY DISEASES ANIMALS DESTROYED BECAUSE OF BRUCELLOSIS Indemnity for Cattle, Bison, and Swine § 51.10 Part 53 of this chapter not applicable. No claim for indemnity for animals destroyed...

  17. 9 CFR 51.10 - Part 53 of this chapter not applicable.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...CONTROL AND ERADICATION OF LIVESTOCK OR POULTRY DISEASES ANIMALS DESTROYED BECAUSE OF BRUCELLOSIS Indemnity for Cattle, Bison, and Swine § 51.10 Part 53 of this chapter not applicable. No claim for indemnity for animals destroyed...

  18. 9 CFR 51.10 - Part 53 of this chapter not applicable.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...CONTROL AND ERADICATION OF LIVESTOCK OR POULTRY DISEASES ANIMALS DESTROYED BECAUSE OF BRUCELLOSIS Indemnity for Cattle, Bison, and Swine § 51.10 Part 53 of this chapter not applicable. No claim for indemnity for animals destroyed...

  19. 42 CFR 124.11 - Applicability of 45 CFR part 74.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Applicability of 45 CFR part 74. 124.11 Section 124.11 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES HEALTH RESOURCES DEVELOPMENT MEDICAL FACILITY CONSTRUCTION AND MODERNIZATION Project Grants...

  20. Fission matrix capability for MCNP, Part II - Applications

    SciTech Connect

    Carney, S. E. [University of Michigan, NERS Department, 2355 Bonisteel Boulevard, Ann Arbor, MI 48109 (United States); Brown, F. B. [Los Alamos National Laboratory, Monte Carlo Codes Group, MS A143, PO Box 1663, Los Alamos, NM 87545 (United States); Kiedrowski, B. C. [University of Michigan, NERS Department, 2355 Bonisteel Boulevard, Ann Arbor, MI 48109 (United States); Martin, W. R. [Los Alamos National Laboratory, Monte Carlo Codes Group, MS A143, PO Box 1663, Los Alamos, NM 87545 (United States)

    2013-07-01

    This paper describes the initial experience and results from implementing a fission matrix capability into the MCNP Monte Carlo code. The fission matrix is obtained at essentially no cost during the normal simulation for criticality calculations. It can be used to provide estimates of the fundamental mode power distribution, the reactor dominance ratio, the eigenvalue spectrum, and higher mode spatial eigenfunctions. It can also be used to accelerate the convergence of the power method iterations. Past difficulties and limitations of the fission matrix approach are overcome with a new sparse representation of the matrix, permitting much larger and more accurate fission matrix representations. Numerous examples are presented. A companion paper (Part I - Theory) describes the theoretical basis for the fission matrix method. (authors)

  1. Beamlines of the Biomedical Imaging and Therapy Facility at the Canadian Light Source - Part 2

    NASA Astrophysics Data System (ADS)

    Wysokinski, T. W.; Chapman, D.; Adams, G.; Renier, M.; Suortti, P.; Thomlinson, W.

    2013-03-01

    The BioMedical Imaging and Therapy (BMIT) facility provides a world class facility with unique synchrotron-specific imaging and therapy capabilities. This paper describes Insertion Device (ID) beamline 05ID-2 with the beam terminated in the first experimental hutch: POE-2. The experimental methods available in POE-2 include: Microbeam Radiation Therapy (MRT), Synchrotron Stereotactic Radiation Therapy (SSRT) and absorption imaging (projection and Computed Tomography (CT)). The source for the ID beamline is a multi-pole superconductive 4.3 T wiggler, which can generate ~30 kW of radiative power and deliver dose as high as 3000 Gy/s required for MRT program. The optics in POE-1 hutch prepares either monochromatic or filtered white beam that is used in POE-2. The Double Crystal (DC), bent Laue monochromator will prepare a beam over 10 cm wide at sample point, while spanning an energy range appropriate for imaging studies of animals (20-100+ keV). The experimental hutch will have a flexible positioning system that can handle subjects up to 120 kg. Several different cameras will be available with resolutions ranging from 4 ?m to 150 ?m. The latest update on the status of 05B1-1 bending magnet (BM) beamline, described in Part 1 [1], is also included.

  2. Laser Speckle Contrast Imaging: theory, instrumentation and applications.

    PubMed

    Senarathna, Janaka; Rege, Abhishek; Li, Nan; Thakor, Nitish V

    2013-01-01

    Laser Speckle Contrast Imaging (LSCI) is a wide field of view, non scanning optical technique for observing blood flow. Speckles are produced when coherent light scattered back from biological tissue is diffracted through the limiting aperture of focusing optics. Mobile scatterers cause the speckle pattern to blur; a model can be constructed by inversely relating the degree of blur, termed speckle contrast to the scatterer speed. In tissue, red blood cells are the main source of moving scatterers. Therefore, blood flow acts as a virtual contrast agent, outlining blood vessels. The spatial resolution (~10 ?m) and temporal resolution (10 ms to 10 s) of LSCI can be tailored to the application. Restricted by the penetration depth of light, LSCI can only visualize superficial blood flow. Additionally, due to its non scanning nature, LSCI is unable to provide depth resolved images. The simple setup and non-dependence on exogenous contrast agents have made LSCI a popular tool for studying vascular structure and blood flow dynamics. We discuss the theory and practice of LSCI and critically analyze its merit in major areas of application such as retinal imaging, imaging of skin perfusion as well as imaging of neurophysiology. PMID:23372086

  3. Wideband optical detector of ultrasound for medical imaging applications.

    PubMed

    Rosenthal, Amir; Kellnberger, Stephan; Omar, Murad; Razansky, Daniel; Ntziachristos, Vasilis

    2014-01-01

    Optical sensors of ultrasound are a promising alternative to piezoelectric techniques, as has been recently demonstrated in the field of optoacoustic imaging. In medical applications, one of the major limitations of optical sensing technology is its susceptibility to environmental conditions, e.g. changes in pressure and temperature, which may saturate the detection. Additionally, the clinical environment often imposes stringent limits on the size and robustness of the sensor. In this work, the combination of pulse interferometry and fiber-based optical sensing is demonstrated for ultrasound detection. Pulse interferometry enables robust performance of the readout system in the presence of rapid variations in the environmental conditions, whereas the use of all-fiber technology leads to a mechanically flexible sensing element compatible with highly demanding medical applications such as intravascular imaging. In order to achieve a short sensor length, a pi-phase-shifted fiber Bragg grating is used, which acts as a resonator trapping light over an effective length of 350 µm. To enable high bandwidth, the sensor is used for sideway detection of ultrasound, which is highly beneficial in circumferential imaging geometries such as intravascular imaging. An optoacoustic imaging setup is used to determine the response of the sensor for acoustic point sources at different positions. PMID:24895083

  4. One-part fast cure chipbonder epoxy adhesives for electronic applications

    Microsoft Academic Search

    O. Figovsky; L. Sklyarsky; O. Sklyarsky

    2000-01-01

    One part epoxy adhesives are known for their versatility in applications including electronics. They generally give outstanding adhesion to a wider range of substrates, very high bond strength and have excellent electrical properties and resistance to soldering. At the same time, one-part epoxy adhesives still have several limitations for electronic applications related to the long-continued curing of well-known adhesives, for

  5. An overview of artificial intelligence and robotics. Volume 1: Artificial intelligence. Part B: Applications

    NASA Technical Reports Server (NTRS)

    Gevarter, W. B.

    1983-01-01

    Artificial Intelligence (AI) is an emerging technology that has recently attracted considerable attention. Many applications are now under development. This report, Part B of a three part report on AI, presents overviews of the key application areas: Expert Systems, Computer Vision, Natural Language Processing, Speech Interfaces, and Problem Solving and Planning. The basic approaches to such systems, the state-of-the-art, existing systems and future trends and expectations are covered.

  6. Application of digital image processing techniques to astronomical imagery, 1979

    NASA Technical Reports Server (NTRS)

    Lorre, J. J.

    1979-01-01

    Several areas of applications of image processing to astronomy were identified and discussed. These areas include: (1) deconvolution for atmospheric seeing compensation; a comparison between maximum entropy and conventional Wiener algorithms; (2) polarization in galaxies from photographic plates; (3) time changes in M87 and methods of displaying these changes; (4) comparing emission line images in planetary nebulae; and (5) log intensity, hue saturation intensity, and principal component color enhancements of M82. Examples are presented of these techniques applied to a variety of objects.

  7. Improved tensor scale computation with application to medical image interpolation.

    PubMed

    Xu, Ziyue; Sonka, Milan; Saha, Punam K

    2011-01-01

    Tensor scale (t-scale) is a parametric representation of local structure morphology that simultaneously describes its orientation, shape and isotropic scale. At any image location, t-scale represents the largest ellipse (an ellipsoid in three dimensions) centered at that location and contained in the same homogeneous region. Here, we present an improved algorithm for t-scale computation and study its application to image interpolation. Specifically, the t-scale computation algorithm is improved by: (1) enhancing the accuracy of identifying local structure boundary and (2) combining both algebraic and geometric approaches in ellipse fitting. In the context of interpolation, a closed form solution is presented to determine the interpolation line at each image location in a gray level image using t-scale information of adjacent slices. At each location on an image slice, the method derives normal vector from its t-scale that yields trans-orientation of the local structure and points to the closest edge point. Normal vectors at the matching two-dimensional locations on two adjacent slices are used to compute the interpolation line using a closed form equation. The method has been applied to BrainWeb data sets and to several other images from clinical applications and its accuracy and response to noise and other image-degrading factors have been examined and compared with those of current state-of-the-art interpolation methods. Experimental results have established the superiority of the new t-scale based interpolation method as compared to existing interpolation algorithms. Also, a quantitative analysis based on the paired t-test of residual errors has ascertained that the improvements observed using the t-scale based interpolation are statistically significant. PMID:20961733

  8. Global Approach for Technical Data Management Application to Ship Equipment Part Families

    E-print Network

    Paris-Sud XI, Université de

    Global Approach for Technical Data Management Application to Ship Equipment Part Families J. Le approach that enables technical data to be managed and used throughout the product life a company environment that designs and produces families of ship equipment parts. This case study

  9. TIAA-CREF MEDICARE-ELIGIBLE RETIREES APPLICATION FOR MEDICARE PART B PREMIUM REIMBURSEMENT

    E-print Network

    Rosen, Jay

    TIAA-CREF MEDICARE-ELIGIBLE RETIREES APPLICATION FOR MEDICARE PART B PREMIUM REIMBURSEMENT RETIREE) PLEASE ATTACH A COPY OF YOUR RETIREE HEALTH INSURANCE CARD AND THE MEDICARE CARD FOR YOURSELF AND YOUR receiving Medicare Part B premium reimbursement through their employer? Yes No MEDICARE INFORMATION

  10. [Resource Conservation and Recovery Act Part B permit application: Volume 6, Revision 3: Engineering Materials

    SciTech Connect

    Not Available

    1993-01-01

    This report is part of revision 3 to the Resource Conservation and Recovery Act part B permit application for the WIPP facility. Engineering drawings and details are included on the following: fire protection sprinkler system and fire water collection system; fault analysis and protective device coordination; primary power distribution, area electrical diagrams; paving details; fencing plan; railroad access plan; and access road plans.

  11. [Resource Conservation and Recovery Act Part B permit application: Volume 6, Revision 3: Engineering Materials

    SciTech Connect

    Not Available

    1993-03-01

    This report is part of revision 3 to the Resource Conservation and Recovery Act part B permit application for the WIPP facility. Engineering drawings and details are included on the following: fire protection sprinkler system and fire water collection system; fault analysis and protective device coordination; primary power distribution, area electrical diagrams; paving details; fencing plan; railroad access plan; and access road plans.

  12. Title 40 CFR Part 191 Subparts B and C Compliance Recertification Application 2004 EXECUTIVE SUMMARY1

    E-print Network

    for at least 10,000 years. Content of the CRA24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 As required by 40 CFRTitle 40 CFR Part 191 Subparts B and C Compliance Recertification Application 2004 EXECUTIVE to EPA documentation of WIPP's continuing compliance with the Agency's disposal regulations, 40 CFR Part

  13. 40 CFR Table 1a to Subpart G of... - Applicable 40 CFR Part 63 General Provisions

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Pollutants From the Synthetic Organic Chemical Manufacturing Industry for Process Vents, Storage Vessels, Transfer Operations, and Wastewater Pt. 63, Subpt. G, Table 1A Table 1A to Subpart G of Part 63—Applicable 40 CFR Part 63 General Provisions 40...

  14. Nonserial Dynamic Programming with Applications in Smart Home Appliances Scheduling Part I: Precedence Graph Simplification

    E-print Network

    Johansson, Karl Henrik

    Nonserial Dynamic Programming with Applications in Smart Home Appliances Scheduling ­ Part I to some time precedence constraints. In general, the system of precedence constraints may contain for reducing the computation effort of the nonserial DP procedure presented in the companion paper (i.e., Part

  15. GSTARS computer models and their applications, part I: theoretical development

    USGS Publications Warehouse

    Yang, C.T.; Simoes, F.J.M.

    2008-01-01

    GSTARS is a series of computer models developed by the U.S. Bureau of Reclamation for alluvial river and reservoir sedimentation studies while the authors were employed by that agency. The first version of GSTARS was released in 1986 using Fortran IV for mainframe computers. GSTARS 2.0 was released in 1998 for personal computer application with most of the code in the original GSTARS revised, improved, and expanded using Fortran IV/77. GSTARS 2.1 is an improved and revised GSTARS 2.0 with graphical user interface. The unique features of all GSTARS models are the conjunctive use of the stream tube concept and of the minimum stream power theory. The application of minimum stream power theory allows the determination of optimum channel geometry with variable channel width and cross-sectional shape. The use of the stream tube concept enables the simulation of river hydraulics using one-dimensional numerical solutions to obtain a semi-two- dimensional presentation of the hydraulic conditions along and across an alluvial channel. According to the stream tube concept, no water or sediment particles can cross the walls of stream tubes, which is valid for many natural rivers. At and near sharp bends, however, sediment particles may cross the boundaries of stream tubes. GSTARS3, based on FORTRAN 90/95, addresses this phenomenon and further expands the capabilities of GSTARS 2.1 for cohesive and non-cohesive sediment transport in rivers and reservoirs. This paper presents the concepts, methods, and techniques used to develop the GSTARS series of computer models, especially GSTARS3. ?? 2008 International Research and Training Centre on Erosion and Sedimentation and the World Association for Sedimentation and Erosion Research.

  16. A stereoscopic imaging system for laser back scatter based trajectory measurement in ballistics: part 2

    NASA Astrophysics Data System (ADS)

    Chalupka, Uwe; Rothe, Hendrik

    2012-03-01

    The progress on a laser- and stereo-camera-based trajectory measurement system that we already proposed and described in recent publications is given. The system design was extended from one to two more powerful, DSP-controllable LASER systems. Experimental results of the extended system using different projectile-/weapon combinations will be shown and discussed. Automatic processing of acquired images using common 3DIP techniques was realized. Processing steps to extract trajectory segments from images as representative for the current application will be presented. Used algorithms for backward-calculation of the projectile trajectory will be shown. Verification of produced results is done against simulated trajectories, once in terms of detection robustness and once in terms of detection accuracy. Fields of use for the current system are within the ballistic domain. The first purpose is for trajectory measurement of small and middle caliber projectiles on a shooting range. Extension to big caliber projectiles as well as an application for sniper detection is imaginable, but would require further work. Beside classical RADAR, acoustic and optical projectile detection methods, the current system represents a further projectile location method under the new class of electro-optical methods that have been evolved in recent decades and that uses 3D imaging acquisition and processing techniques.

  17. Analysis operator learning and its application to image reconstruction.

    PubMed

    Hawe, Simon; Kleinsteuber, Martin; Diepold, Klaus

    2013-06-01

    Exploiting a priori known structural information lies at the core of many image reconstruction methods that can be stated as inverse problems. The synthesis model, which assumes that images can be decomposed into a linear combination of very few atoms of some dictionary, is now a well established tool for the design of image reconstruction algorithms. An interesting alternative is the analysis model, where the signal is multiplied by an analysis operator and the outcome is assumed to be sparse. This approach has only recently gained increasing interest. The quality of reconstruction methods based on an analysis model severely depends on the right choice of the suitable operator. In this paper, we present an algorithm for learning an analysis operator from training images. Our method is based on l(p)-norm minimization on the set of full rank matrices with normalized columns. We carefully introduce the employed conjugate gradient method on manifolds, and explain the underlying geometry of the constraints. Moreover, we compare our approach to state-of-the-art methods for image denoising, inpainting, and single image super-resolution. Our numerical results show competitive performance of our general approach in all presented applications compared to the specialized state-of-the-art techniques. PMID:23412611

  18. Real-time multispectral imaging application for poultry safety inspection

    NASA Astrophysics Data System (ADS)

    Park, Bosoon; Lawrence, Kurt C.; Windham, William R.; Snead, Matthew P.

    2006-02-01

    The ARS imaging research group in Athens, Georgia has developed a real-time multispectral imaging system for fecal and ingesta contaminant detection on broiler carcasses for poultry industry. The industrial scale system includes a common aperture camera with three visible wavelength optical trim filters. This paper demonstrates calibration of common aperture multispectral imaging hardware and real-time image processing software. The software design, especially the Unified Modeling Language (UML) design approach was used to develop real-time image processing software for on-line application. The UML models including class, object, activity, sequence, and collaboration diagram were presented. Both hardware and software for a real-time fecal and ingesta contaminant detection were tested at the pilot-scale poultry processing line. The test results of industrial sacle real-time system showed that the multispectral imaging technique performed well for detecting fecal contaminants with a commercial processing speed (currently 140 birds per minute). The accuracy for the detection of fecal and ingesta contaminates was approximately 96%.

  19. An efficient and robust image encryption scheme for medical applications

    NASA Astrophysics Data System (ADS)

    Kanso, A.; Ghebleh, M.

    2015-07-01

    In this paper, we propose a novel full and selective chaos-based image encryption scheme suitable for medical image encryption applications. The proposed approach consists of several rounds, where each round is made up of two phases, a shuffling phase and a masking phase. Both phases are block-based and use chaotic cat maps to shuffle and mask an input image. To improve the speed of the proposed scheme while maintaining a high level of security, the scheme employs a pseudorandom matrix, of the same size as the input image, in the masking phase of each round. Blocks of this pseudorandom matrix are permuted in each round of the shuffling phase according to the outputs of some chaotic maps. The proposed scheme applies mixing between blocks of the image in order to prevent cryptanalytic attacks such as differential attacks. Simulation results demonstrate high performance of the proposed scheme and show its robustness against cryptanalytic attacks, thus confirming its suitability for real-time secure image communication.

  20. 40 CFR Table 2 to Subpart Jjjj of... - Applicability of 40 CFR Part 63 General Provisions to Subpart JJJJ

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating Part 63, Subpt. JJJJ, Table 2 Table 2 to Subpart JJJJ of Part 63—Applicability of 40 CFR Part 63 General...

  1. 40 CFR Table 2 to Subpart Jjjj of... - Applicability of 40 CFR Part 63 General Provisions to Subpart JJJJ

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES National Emission Standards for Hazardous Air Pollutants: Paper and Other Web Coating Part 63, Subpt. JJJJ, Table 2 Table 2 to Subpart JJJJ of Part 63—Applicability of 40 CFR Part 63 General...

  2. Superresolution parallel magnetic resonance imaging: Application to functional and spectroscopic imaging

    PubMed Central

    Otazo, Ricardo; Lin, Fa-Hsuan; Wiggins, Graham; Jordan, Ramiro; Sodickson, Daniel; Posse, Stefan

    2009-01-01

    Standard parallel magnetic resonance imaging (MRI) techniques suffer from residual aliasing artifacts when the coil sensitivities vary within the image voxel. In this work, a parallel MRI approach known as Superresolution SENSE (SURE-SENSE) is presented in which acceleration is performed by acquiring only the central region of k-space instead of increasing the sampling distance over the complete k-space matrix and reconstruction is explicitly based on intra-voxel coil sensitivity variation. In SURE-SENSE, parallel MRI reconstruction is formulated as a superresolution imaging problem where a collection of low resolution images acquired with multiple receiver coils are combined into a single image with higher spatial resolution using coil sensitivities acquired with high spatial resolution. The effective acceleration of conventional gradient encoding is given by the gain in spatial resolution, which is dictated by the degree of variation of the different coil sensitivity profiles within the low resolution image voxel. Since SURE-SENSE is an ill-posed inverse problem, Tikhonov regularization is employed to control noise amplification. Unlike standard SENSE, for which acceleration is constrained to the phase-encoding dimension/s, SURE-SENSE allows acceleration along all encoding directions — for example, two-dimensional acceleration of a 2D echo-planar acquisition. SURE-SENSE is particularly suitable for low spatial resolution imaging modalities such as spectroscopic imaging and functional imaging with high temporal resolution. Application to echo-planar functional and spectroscopic imaging in human brain is presented using two-dimensional acceleration with a 32-channel receiver coil. PMID:19341804

  3. Adaptive optics and phase diversity imaging for responsive space applications.

    SciTech Connect

    Smith, Mark William; Wick, David Victor

    2004-11-01

    The combination of phase diversity and adaptive optics offers great flexibility. Phase diverse images can be used to diagnose aberrations and then provide feedback control to the optics to correct the aberrations. Alternatively, phase diversity can be used to partially compensate for aberrations during post-detection image processing. The adaptive optic can produce simple defocus or more complex types of phase diversity. This report presents an analysis, based on numerical simulations, of the efficiency of different modes of phase diversity with respect to compensating for specific aberrations during post-processing. It also comments on the efficiency of post-processing versus direct aberration correction. The construction of a bench top optical system that uses a membrane mirror as an active optic is described. The results of characterization tests performed on the bench top optical system are presented. The work described in this report was conducted to explore the use of adaptive optics and phase diversity imaging for responsive space applications.

  4. An Investigation into Graph Cut Parameter Optimisation for Image-Fusion Applications

    E-print Network

    Sun, Jing

    An Investigation into Graph Cut Parameter Optimisation for Image-Fusion Applications Xiao Bao Clark, and analyse parameters' effectiveness for different image-fusion applications. Section 2 will ex- plain choices for image-fusion applications. Section 4 explains our experimental set-up with results summarised

  5. Avalanche photodiodes for high-resolution UV imaging applications

    NASA Astrophysics Data System (ADS)

    Sood, Ashok K.; Richwine, Robert A.; Egerton, E. James; Puri, Yash R.; Dupuis, Russell D.; Dhar, Nibir K.; Balcerak, Raymond S.

    2011-10-01

    High resolution imaging in the UV band has a lot of applications in Defense and Commercial Applications. The shortest wavelength is desired for spatial resolution which allows for small pixels and large formats. UVAPD's have been demonstrated as discrete devices demonstrating gain. The next frontier is to develop UV APD arrays with high gain to demonstrate high resolution imaging. We also disuses our recent efforts on development of APD's using MOCVD of GaN/ AlGaN. We present an analytical model that can predict sensor performance in the UV band using p-i-n or APD detectors with and without gain and other detector and sensor parameters for a desired UV band of interest. SNR's can be modeled from illuminated targets at various distances with high resolution under standard MODTRAN atmospheres in the UV band using detector arrays with unity gain and with high gain APD along with continuous or pulsed UV lasers.

  6. Grid Computing Application for Brain Magnetic Resonance Image Processing

    NASA Astrophysics Data System (ADS)

    Valdivia, F.; Crépeault, B.; Duchesne, S.

    2012-02-01

    This work emphasizes the use of grid computing and web technology for automatic post-processing of brain magnetic resonance images (MRI) in the context of neuropsychiatric (Alzheimer's disease) research. Post-acquisition image processing is achieved through the interconnection of several individual processes into pipelines. Each process has input and output data ports, options and execution parameters, and performs single tasks such as: a) extracting individual image attributes (e.g. dimensions, orientation, center of mass), b) performing image transformations (e.g. scaling, rotation, skewing, intensity standardization, linear and non-linear registration), c) performing image statistical analyses, and d) producing the necessary quality control images and/or files for user review. The pipelines are built to perform specific sequences of tasks on the alphanumeric data and MRIs contained in our database. The web application is coded in PHP and allows the creation of scripts to create, store and execute pipelines and their instances either on our local cluster or on high-performance computing platforms. To run an instance on an external cluster, the web application opens a communication tunnel through which it copies the necessary files, submits the execution commands and collects the results. We present result on system tests for the processing of a set of 821 brain MRIs from the Alzheimer's Disease Neuroimaging Initiative study via a nonlinear registration pipeline composed of 10 processes. Our results show successful execution on both local and external clusters, and a 4-fold increase in performance if using the external cluster. However, the latter's performance does not scale linearly as queue waiting times and execution overhead increase with the number of tasks to be executed.

  7. Luminescent magnetic particles: structures, syntheses, multimodal imaging, and analytical applications

    Microsoft Academic Search

    Günter Mistlberger; Ingo Klimant

    2010-01-01

    Luminescent magnetic particles (LuMaPs) are attractive tools for life science applications such as multimodal imaging, analyte\\u000a monitoring, nanotherapeutics, and combinations thereof. LuMaPs consist of at least one magnetic and one luminescent component\\u000a which often are incorporated in a (polymeric) matrix. Alarge variety of materials do exist for the components that make up\\u000a LuMaPs. However, a smart selection and combination is

  8. Development of biosensor based on imaging ellipsometry and its applications

    NASA Astrophysics Data System (ADS)

    Jin, Gang

    2011-03-01

    We have reviewed the development of the biosensor based on imaging ellipsometry including its principle, methodology and general engineering model structure, mainly compared experimental setups between the previous one and the recently developed one. It's obvious that the sensitivity and the signal to noise ratio has been improved by a various spectroscopic light source, the optimization of polarized components setting and a cool CCD, especially the contribution of the CCD, which makes the biosensor available in more and more biomedical applications.

  9. Optical Imaging Sensors and Systems for Homeland Security Applications

    NASA Astrophysics Data System (ADS)

    Javidi, Bahram

    Optical and photonic systems and devices have significant potential for homeland security. "Optical Imaging Sensors and Systems for Homeland Security Applications" presents original and significant technical contributions from leaders of industry, government, and academia in the field of optical and photonic sensors, systems and devices for detection, identification, prevention, sensing, security, verification and anti-counterfeiting. The chapters have recent and technically significant results, ample illustrations, figures, and key references.

  10. Imaging Radar Applications in the Death Valley Region

    NASA Technical Reports Server (NTRS)

    Farr, Tom G.

    1996-01-01

    Death Valley has had a long history as a testbed for remote sensing techniques (Gillespie, this conference). Along with visible-near infrared and thermal IR sensors, imaging radars have flown and orbited over the valley since the 1970's, yielding new insights into the geologic applications of that technology. More recently, radar interferometry has been used to derive digital topographic maps of the area, supplementing the USGS 7.5' digital quadrangles currently available for nearly the entire area. As for their shorter-wavelength brethren, imaging radars were tested early in their civilian history in Death Valley because it has a variety of surface types in a small area without the confounding effects of vegetation. In one of the classic references of these early radar studies, in a semi-quantitative way the response of an imaging radar to surface roughness near the radar wavelength, which typically ranges from about 1 cm to 1 m was explained. This laid the groundwork for applications of airborne and spaceborne radars to geologic problems in and regions. Radar's main advantages over other sensors stems from its active nature- supplying its own illumination makes it independent of solar illumination and it can also control the imaging geometry more accurately. Finally, its long wavelength allows it to peer through clouds, eliminating some of the problems of optical sensors, especially in perennially cloudy and polar areas.

  11. Ambient mass spectrometry imaging: plasma assisted laser desorption ionization mass spectrometry imaging and its applications.

    PubMed

    Feng, Baosheng; Zhang, Jialing; Chang, Cuilan; Li, Liping; Li, Min; Xiong, Xingchuang; Guo, Chengan; Tang, Fei; Bai, Yu; Liu, Huwei

    2014-05-01

    Mass spectrometry imaging (MSI) has been widely used in many research areas for the advantages of providing informative molecular distribution with high specificity. Among the recent progress, ambient MSI has attracted increasing interests owing to its characteristics of ambient, in situ, and nonpretreatment analysis. Here, we are presenting the ambient MSI for traditional Chinese medicines (TCMs) and authentication of work of art and documents using plasma assisted laser desorption ionization mass spectrometry (PALDI-MS). Compared with current ambient MSI methods, an excellent average resolution of 60 ?m × 60 ?m pixel size was achieved using this system. The feasibility of PALDI-based MSI was confirmed by seal imaging, and its authentication applications were demonstrated by imaging of printed Chinese characters. Imaging of the Radix Scutellariae slice showed that the two active components, baicalein and wogonin, mainly were distributed in the epidermis of the root, which proposed an approach for distinguishing TCMs' origins and the distribution of active components of TCMs and exploring the environmental effects of plant growth. PALDI-MS imaging provides a strong complement for the MSI strategy with the enhanced spatial resolution, which is promising in many research fields, such as artwork identification, TCMs' and botanic research, pharmaceutical applications, etc. PMID:24670045

  12. Case studies - Applications of laser systems for cutting and welding aerospace parts

    NASA Astrophysics Data System (ADS)

    Vanderwert, Terry L.

    This paper presents three case studies of current industrial applications of laser systems, showing that multiaxis laser machining systems are satisfying demands for reduced part-production costs, higher quality, greater flexibility, and faster turnaround on prototype and production aerospace parts. For example, laser cutting has replaced milling for trimming a deep-drawn gas turbine part and increased throughput from 18 pieces per day to 18 pieces in 30 minutes. The case studies described include that of a job shop supplying aircraft engine parts, and those of two aircraft manufacturers.

  13. A Unified Approach to Data Modeling for a Class of Image Database Applications

    Microsoft Academic Search

    Venkat N. Gudivada; Vijay V. Raghavan; Kanonkluk Vanapipat

    1996-01-01

    Recently, there has been widespread interest in various kinds of database management systems for managing information from images. Image Retrieval (IR) problem is concerned with retrieving images that are relevant to users' requests from a large collection of images, referred to as the image database. Since the application areas are very diverse, there seems to be no consensus as to

  14. Application of Perona Malik anisotropic diffusion on digital radiographic image

    SciTech Connect

    Halim, Suhaila Abd; Razak, Rohayu Abdul; Ibrahim, Arsmah [Center of Mathematics Studies, Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor DE (Malaysia); Manurung, Yupiter HP [Advanced Manufacturing Technology Center, Faculty of Mechanical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor DE (Malaysia)

    2014-07-10

    Perona Malik Anisotropic Diffusion (PMAD) is a very useful and efficient denoising technique if the parameters are properly selected. Overestimating the parameters may cause oversmoothed and underestimating it may leave unfiltered noise. This makes the selection of parameters a crucial process. In this paper the PMAD model is solved using a finite difference scheme The discretized model is evaluated using different diffusion coefficient of exponential and quadratic on defective radiographic images in terms of quality and efficiency. In the application of the PMAD model on image data, a set of defective radiographic images of welding is used as input data. Peak Signal to Noise Ratio (PSNR), Structural Similarity Measure (SSIM) and temporal time are used to evaluate the performance of the model. The implementation of the experiment has been carried out using MATLAB R2009a. In terms of quality, results show that the Quadratic Diffusion Coefficient Function (QDCF) provides better results compared with the Exponential Diffusion Coefficient Function (EDCF). In conclusion, the denoising effect using PMAD model based on finite difference scheme shows able to improve image quality by removing noise in the defective radiographic image.

  15. Clinical Applications of Magnetic Resonance Imaging—Current Status

    PubMed Central

    Cammoun, Driss; Davis, Kathleen A.; Hendee, William R.

    1985-01-01

    Magnetic resonance imaging has far-reaching real and possible clinical applications. Its usefulness has been best explored and realized in the central nervous system, especially the posterior fossa and brain stem, where most abnormalities are better identified than with computed tomography. Its lack of ionizing radiation and extreme sensitivity to normal and abnormal patterns of myelination make magnetic resonance imaging advantageous for diagnosing many neonatal and pediatric abnormalities. New, reliable cardiac gating techniques open the way for promising studies of cardiac anatomy and function. The ability to image directly in three orthogonal planes gives us new insight into staging and follow-up of pelvic tumors and other pelvic abnormalities. Exquisite soft tissue contrast, far above that attainable by other imaging modalities, has made possible the early diagnosis of traumatic ligamentous knee injury, avascular necrosis of the hip and diagnosis, treatment planning and follow-up of musculoskeletal neoplasms. ImagesFigure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8.Figure 9. PMID:3911592

  16. New technology of functional infrared imaging and its clinical applications

    NASA Astrophysics Data System (ADS)

    Yang, Hongqin; Xie, Shusen; Lu, Zukang; Liu, Zhongqi

    2006-01-01

    With improvements in infrared camera technology, the promise of reduced costs and noninvasive character, infrared thermal imaging resurges in medicine. The paper introduces a new technology of functional infrared imaging, thermal texture maps (TTM), which is not only an apparatus for thermal radiation imaging but also a new method for revealing the relationship between the temperature distribution of the skin surface and the emission field inside body. The skin temperature distribution of a healthy human body exhibits a contralateral symmetry. Any disease in the body is associated with an alteration of the thermal distribution of human body. Infrared thermography is noninvasive, so it is the best choice for studying the physiology of thermoregulation and the thermal dysfunction associated with diseases. Reading and extracting information from the thermograms is a complex and subjective task that can be greatly facilitated by computerized techniques. Through image processing and measurement technology, surface or internal radiation sources can be non-invasively distinguished through extrapolation. We discuss the principle, the evaluation procedure and the effectiveness of TTM technology in the clinical detection and diagnosis of cancers, especially in their early stages and other diseases by comparing with other imaging technologies, such as ultrasound. Several study cases are given to show the effectiveness of this method. At last, we point out the applications of TTM technology in the research field of traditional medicine.

  17. Application of Perona Malik anisotropic diffusion on digital radiographic image

    NASA Astrophysics Data System (ADS)

    Halim, Suhaila Abd; Razak, Rohayu Abdul; Ibrahim, Arsmah; Manurung, Yupiter HP

    2014-07-01

    Perona Malik Anisotropic Diffusion (PMAD) is a very useful and efficient denoising technique if the parameters are properly selected. Overestimating the parameters may cause oversmoothed and underestimating it may leave unfiltered noise. This makes the selection of parameters a crucial process. In this paper the PMAD model is solved using a finite difference scheme The discretized model is evaluated using different diffusion coefficient of exponential and quadratic on defective radiographic images in terms of quality and efficiency. In the application of the PMAD model on image data, a set of defective radiographic images of welding is used as input data. Peak Signal to Noise Ratio (PSNR), Structural Similarity Measure (SSIM) and temporal time are used to evaluate the performance of the model. The implementation of the experiment has been carried out using MATLAB R2009a. In terms of quality, results show that the Quadratic Diffusion Coefficient Function (QDCF) provides better results compared with the Exponential Diffusion Coefficient Function (EDCF). In conclusion, the denoising effect using PMAD model based on finite difference scheme shows able to improve image quality by removing noise in the defective radiographic image.

  18. Image Description with Local Patterns: An Application to Face Recognition

    NASA Astrophysics Data System (ADS)

    Zhou, Wei; Ahrary, Alireza; Kamata, Sei-Ichiro

    In this paper, we propose a novel approach for presenting the local features of digital image using 1D Local Patterns by Multi-Scans (1DLPMS). We also consider the extentions and simplifications of the proposed approach into facial images analysis. The proposed approach consists of three steps. At the first step, the gray values of pixels in image are represented as a vector giving the local neighborhood intensity distrubutions of the pixels. Then, multi-scans are applied to capture different spatial information on the image with advantage of less computation than other traditional ways, such as Local Binary Patterns (LBP). The second step is encoding the local features based on different encoding rules using 1D local patterns. This transformation is expected to be less sensitive to illumination variations besides preserving the appearance of images embedded in the original gray scale. At the final step, Grouped 1D Local Patterns by Multi-Scans (G1DLPMS) is applied to make the proposed approach computationally simpler and easy to extend. Next, we further formulate boosted algorithm to extract the most discriminant local features. The evaluated results demonstrate that the proposed approach outperforms the conventional approaches in terms of accuracy in applications of face recognition, gender estimation and facial expression.

  19. HuntIR thermal imagers for reconnaissance and targeting applications

    NASA Astrophysics Data System (ADS)

    Breiter, Rainer; Cabanski, Wolfgang A.; Ihle, Tobias; Mauk, Karl-Heinz; Rode, Werner

    2004-08-01

    A new family of light handheld military thermal imagers for reconnaissance and targeting applications was developed based on AIM's IR components like IR detection modules, command and control electronics and image processing units. Three different types of imagers provide solutions for different requirements in identification ranges of targets. The highest performance device makes use of a FPA MCT 384x288 MWIR detector with a motorized double field of view optics. An identification range up to 2400m for the NATO standard target was proven according to the FGAN-FOM TRM3 range model. The device provides a mechanical adaptation to weapon systems and provides target markers for common hand weapons of the German army. A single field of view MCT device for 1000m ranges and an uncooled device on the lower performance end complete the imager family. Electronics for intelligent power management from batteries and display electronics were developed to provide stand alone operation. The modular concept allows the use of the same image processing unit for all devices providing special features for best performance like scene-based non-uniformity correction together with an optical calibration element and dynamic reduction including automatic histogram equalization for optimized scene display and text or graphics overlay. Due to the modular concept the components like the image processing unit are already used and validated in programs like the thermal sight for the self defense gun of the reconnaissance vehicle FENNEK together with a 320x240 LWIR uncooled microbolometer detector or with the MCT 384x288 MWIR detection module in a thermal imager for the German army UAV Luna.

  20. BOOK REVIEW: Infrared Thermal Imaging: Fundamentals, Research and Applications Infrared Thermal Imaging: Fundamentals, Research and Applications

    Microsoft Academic Search

    M. Vollmer; K. P. Möllmann

    2011-01-01

    Ten years ago, a book with a title like this would be interesting only to a narrow circle of specialists. Thanks to rapid advances in technology, the price of thermal imaging devices has dropped sharply, so they have, almost overnight, become accessible to a wide range of users. As the authors point out in the preface, the growth of this

  1. Application of different fatigue strength criteria on shot peened notched parts. Part 2: nominal and local stress approaches

    NASA Astrophysics Data System (ADS)

    Bagherifard, Sara; Guagliano, Mario

    2014-01-01

    Fatigue life prediction for notched components is an essential step within the design process of machines. In the past years different fatigue criteria have been applied for fatigue behaviour assessment of notched components subjected to shot peening treatment. However, due to complexity of the phenomenon, still an agreed set of standard methods for predicting fatigue endurance of shot peened notched parts is not available. In this work a series of recognized fatigue strength evaluation methods are applied on two notched shot peened specimens under different fatigue loading. After having considered the approaches based on fracture mechanics (see Part 1), now the local stress methods and the FKM guideline (which includes both a nominal stress approach and a local stress one) are considered. The results allow evidencing the criteria able to better consider the effect of SP and to underline the critical points related to the application of the mentioned criteria to shot peened parts. In this regard the FKM guideline and the approach based on critical distance theory are found to provide more accurate results.

  2. Impact of an etched EUV mask black border on imaging: part II

    NASA Astrophysics Data System (ADS)

    Davydova, Natalia; de Kruif, Robert; Morimoto, Hiroaki; Sakata, Yo; Kotani, Jun; Fukugami, Norihito; Kondo, Shinpei; Imoto, Tomohiro; Connolly, Brid; van Gestel, Dries; Oorschot, Dorothe; Rio, David; Zimmerman, John; Harned, Noreen

    2013-09-01

    The image border is a pattern free dark area around the die on the photomask serving as transition area between the parts of the mask that is shielded from the exposure light by the Reticle Masking (ReMa) blades and the die. When printing a die at dense spacing on an EUV scanner, the reflection from its image border overlaps with the edges of neighboring dies affecting CD and contrast in this area. This is related to the fact that EUV absorber stack has 1-3% reflectance for actinic light. For a 55nm thick absorber the induced CD drop at the edges is found to be 4-5 nm for 27 nm dense lines. In this work we will show an overview of the absorber reflection impact on CD at the edge of the field across EUV scanner generations, for several imaging nodes and multiple absorber heights. Increasing spacing between dies on the wafer would prevent the unwanted exposure but results in an unacceptable loss of valuable wafer real estate thereby reducing the yield per wafer and is thus not a viable manufacturing solution. In order to mitigate the reflection from the image border one needs to create a so called black border. The most promising approach is removal of the absorber and the underlying multilayer down to the low reflective LTEM substrate by multilayer etching. It was shown in the previous study that the impact on CD was reduced essentially for 27 nm dense lines exposed on ASML NXE:3100. In this work we will continue the study of a multilayer etched black border impact on imaging. In particular, 22 nm lines/spaces imaging on ASML NXE:3300 EUV scanner will be investigated in the areas close to the black border as well as die to die effects. We will look closer into the CD uniformity impact by DUV Out-of-Band light reflected from black border and its mitigation. A possible OPC approach will also be evaluated.

  3. Adaptation of web pages and images for mobile applications

    NASA Astrophysics Data System (ADS)

    Kopf, Stephan; Guthier, Benjamin; Lemelson, Hendrik; Effelsberg, Wolfgang

    2009-02-01

    In this paper, we introduce our new visualization service which presents web pages and images on arbitrary devices with differing display resolutions. We analyze the layout of a web page and simplify its structure and formatting rules. The small screen of a mobile device is used much better this way. Our new image adaptation service combines several techniques. In a first step, border regions which do not contain relevant semantic content are identified. Cropping is used to remove these regions. Attention objects are identified in a second step. We use face detection, text detection and contrast based saliency maps to identify these objects and combine them into a region of interest. Optionally, the seam carving technique can be used to remove inner parts of an image. Additionally, we have developed a software tool to validate, add, delete, or modify all automatically extracted data. This tool also simulates different mobile devices, so that the user gets a feeling of how an adapted web page will look like. We have performed user studies to evaluate our web and image adaptation approach. Questions regarding software ergonomics, quality of the adapted content, and perceived benefit of the adaptation were asked.

  4. Novel multi-beam X-ray source for vacuum electronics enabled medical imaging applications

    NASA Astrophysics Data System (ADS)

    Neculaes, V. Bogdan

    2013-10-01

    For almost 100 of years, commercial medical X-ray applications have relied heavily on X-ray tube architectures based on the vacuum electronics design developed by William Coolidge at the beginning of the twentieth century. Typically, the Coolidge design employs one hot tungsten filament as the electron source; the output of the tube is one X-ray beam. This X-ray source architecture is the state of the art in today's commercial medical imaging applications, such as Computed Tomography. Recently, GE Global Research has demonstrated the most dramatic extension of the Coolidge vacuum tube design for Computed Tomography (CT) in almost a century: a multi-beam X-ray source containing thirty two cathodes emitting up to 1000 mA, in a cathode grounded - anode at potential architecture (anode up to 140 kV). This talk will present the challenges of the X-ray multi-beam vacuum source design - space charge electron gun design, beam focusing to compression ratios needed in CT medical imaging applications (image resolution is critically dependent on how well the electron beam is focused in vacuum X-ray tubes), electron emitter choice to fit the aggressive beam current requirements, novel electronics for beam control and focusing, high voltage and vacuum solutions, as well as vacuum chamber design to sustain the considerable G forces typically encountered on a CT gantry (an X-ray vacuum tube typically rotates on the CT gantry at less than 0.5 s per revolution). Consideration will be given to various electron emitter technologies available for this application - tungsten emitters, dispenser cathodes and carbon nano tubes (CNT) - and their tradeoffs. The medical benefits potentially enabled by this unique vacuum multi-beam X-ray source are: X-ray dose reduction, reduction of image artifacts and improved image resolution. For almost 100 of years, commercial medical X-ray applications have relied heavily on X-ray tube architectures based on the vacuum electronics design developed by William Coolidge at the beginning of the twentieth century. Typically, the Coolidge design employs one hot tungsten filament as the electron source; the output of the tube is one X-ray beam. This X-ray source architecture is the state of the art in today's commercial medical imaging applications, such as Computed Tomography. Recently, GE Global Research has demonstrated the most dramatic extension of the Coolidge vacuum tube design for Computed Tomography (CT) in almost a century: a multi-beam X-ray source containing thirty two cathodes emitting up to 1000 mA, in a cathode grounded - anode at potential architecture (anode up to 140 kV). This talk will present the challenges of the X-ray multi-beam vacuum source design - space charge electron gun design, beam focusing to compression ratios needed in CT medical imaging applications (image resolution is critically dependent on how well the electron beam is focused in vacuum X-ray tubes), electron emitter choice to fit the aggressive beam current requirements, novel electronics for beam control and focusing, high voltage and vacuum solutions, as well as vacuum chamber design to sustain the considerable G forces typically encountered on a CT gantry (an X-ray vacuum tube typically rotates on the CT gantry at less than 0.5 s per revolution). Consideration will be given to various electron emitter technologies available for this application - tungsten emitters, dispenser cathodes and carbon nano tubes (CNT) - and their tradeoffs. The medical benefits potentially enabled by this unique vacuum multi-beam X-ray source are: X-ray dose reduction, reduction of image artifacts and improved image resolution. This work was funded in part by NIH grant R01EB006837.

  5. Indocyanine Green Loaded Nanoconstructs for Optical Imaging and Phototherapeutic Applications

    NASA Astrophysics Data System (ADS)

    Bahmani, Baharak

    Development of theranostic nano-constructs may enable diagnosis and treatment of diseases at high spatial resolution. Optically active nanoparticles are widely pursued as exogenous chromophores in diagnostic imaging and phototherapeutic applications. However, the blood circulation time of nanoparticles remains limited due to the rapid clearance of the nanoparticles by reticuloendothelial system (RES). Coating with Polyethylene glycol (PEG) is a strategy to extend the circulation time of nanoparticles. Here, we report PEGylation of polymeric-based nanocapsules loaded with Indocyanine green (ICG) and effect of PEG's molecular weight on the uptake of these nanocapsules by human spleen macrophages and hepatocytes using flow cytometry. To characterize the biodistribution of the constructs, we performed in vivo quantitative fluorescence imaging in mice and subsequently analyzed the various extracted organs. Our results suggest that encapsulation of ICG in these PEGylated constructs is an effective approach to prolong the circulation time of ICG and delay its hepatic accumulation. Increased bioavailability of ICG, offers the potential of extending the clinical applications of ICG. Targeted delivery of therapeutic and imaging agents using surface modified nanovectors has been explored immensely in recent years. The growing demand for site-specific and efficient delivery of nanovectors entails stable surface conjugation of targeting moieties. Our ICG-loaded polymeric nanocapsules (ICG-NCs) have potential for covalent coupling of various targeting moieties and materials due to presence of amine groups on the surface. Here, we covalently bioconjugate PEG-coated ICG-NCs with monoclonal anti- HER2 through reductive amination-mediated procedures. The targeting abilities of HER2 functionalized ICG-NCs toward ovarian cancer was investigated in-vitro. Since these functionalized nanoconstructs have potential applications in laser-induced photodestruction of ovarian cancer cells, we studies NIR laser induced phototherapy of ovarian cancer cells in-vitro. Other than polymeric theranostic nano-constructs, here we demonstrate the first successful engineering of hybrid nano-scale constructs derived from membranes of hemoglobin-depleted erythrocytes that encapsulate ICG. We show the utility of the constructs as photo-theranostic agents in fluorescence imaging and photothermal destruction of human cells. These erythrocyte-mimicking nano-structures can be derived autologously, and may have broad applications in personal nanomedicine ranging from imaging and photo-destruction of cancerous tissues to vascular abnormalities, and longitudinal evaluations of therapeutic interventions.

  6. Introduction to compressive sampling and applications in THz imaging

    NASA Astrophysics Data System (ADS)

    Coltuc, Daniela

    2015-02-01

    The Compressive Sensing (CS) is an emergent theory that provides an alternative to Shannon/Nyquist Sampling Theorem. By CS, a sparse signal can be perfectly recovered from a number of measurements, which is significantly lower than the number of periodic samples required by Sampling Theorem. The THz radiation is nowadays of high interest due to its capability to emphasize the molecular structure of matter. In imaging applications, one of the problems is the sensing device: the THz detectors are slow and bulky and cannot be integrated in large arrays like the CCD. The CS can provide an efficient solution for THz imaging. This solution is the single pixel camera with CS, a concept developed at Rice University that has materialized in several laboratory models and an IR camera released on the market in 2013. We reconsidered this concept in view of THz application and, at present, we have an experimental model for a THz camera. The paper has an extended section dedicated to the CS theory and single pixel camera architecture. In the end, we briefly presents the hardware and software solutions of our model, some characteristics and a first image obtained in visible domain.

  7. Design and Applications of a Multimodality Image Data Warehouse Framework

    PubMed Central

    Wong, Stephen T.C.; Hoo, Kent Soo; Knowlton, Robert C.; Laxer, Kenneth D.; Cao, Xinhau; Hawkins, Randall A.; Dillon, William P.; Arenson, Ronald L.

    2002-01-01

    A comprehensive data warehouse framework is needed, which encompasses imaging and non-imaging information in supporting disease management and research. The authors propose such a framework, describe general design principles and system architecture, and illustrate a multimodality neuroimaging data warehouse system implemented for clinical epilepsy research. The data warehouse system is built on top of a picture archiving and communication system (PACS) environment and applies an iterative object-oriented analysis and design (OOAD) approach and recognized data interface and design standards. The implementation is based on a Java CORBA (Common Object Request Broker Architecture) and Web-based architecture that separates the graphical user interface presentation, data warehouse business services, data staging area, and backend source systems into distinct software layers. To illustrate the practicality of the data warehouse system, the authors describe two distinct biomedical applications—namely, clinical diagnostic workup of multimodality neuroimaging cases and research data analysis and decision threshold on seizure foci lateralization. The image data warehouse framework can be modified and generalized for new application domains. PMID:11971885

  8. Design and applications of a multimodality image data warehouse framework.

    PubMed

    Wong, Stephen T C; Hoo, Kent Soo; Knowlton, Robert C; Laxer, Kenneth D; Cao, Xinhau; Hawkins, Randall A; Dillon, William P; Arenson, Ronald L

    2002-01-01

    A comprehensive data warehouse framework is needed, which encompasses imaging and non-imaging information in supporting disease management and research. The authors propose such a framework, describe general design principles and system architecture, and illustrate a multimodality neuroimaging data warehouse system implemented for clinical epilepsy research. The data warehouse system is built on top of a picture archiving and communication system (PACS) environment and applies an iterative object-oriented analysis and design (OOAD) approach and recognized data interface and design standards. The implementation is based on a Java CORBA (Common Object Request Broker Architecture) and Web-based architecture that separates the graphical user interface presentation, data warehouse business services, data staging area, and backend source systems into distinct software layers. To illustrate the practicality of the data warehouse system, the authors describe two distinct biomedical applications--namely, clinical diagnostic workup of multimodality neuroimaging cases and research data analysis and decision threshold on seizure foci lateralization. The image data warehouse framework can be modified and generalized for new application domains. PMID:11971885

  9. Modulated digital images for biometric and other security applications

    NASA Astrophysics Data System (ADS)

    McCarthy, Lawry D.; Lee, Robert A.; Swiegers, Gerhard F.

    2004-06-01

    There are, in general, two ways for an observer to deal with light that is incorrect in some way (e.g. which is partially out of focus). One approach is to correct the error (e.g. by using a lens to selectively bend the light). Another approach employs selective masking to block those portions of the light which are unwanted (e.g. out of focus). The principle of selective masking is used in a number of important industries. However it has not found widespread application in the field of optical security devices. This work describes the selective masking, or modulation, of digital images as a means of creating documents and transparent media containing overt or covert biometric and other images. In particular, we show how animation effects, flash-illumination features, color-shifting patches, information concealment devices, and biometric portraiture in various settings can be incorporated in transparent media like plastic packaging materials, credit cards, and plastic banknotes. We also demonstrate the application of modulated digital images to the preparation of optically variable diffractive foils which are readily customized to display biometric portraits and information. Selective masking is shown to be an important means of creating a diverse range of effects useful in authentication. Such effects can be readily and inexpensively produced without the need, for example, to fabricate lenses on materials which may not be conducive in this respect.

  10. Measurements and analysis in imaging for biomedical applications

    NASA Astrophysics Data System (ADS)

    Hoeller, Timothy L.

    2009-02-01

    A Total Quality Management (TQM) approach can be used to analyze data from biomedical optical and imaging platforms of tissues. A shift from individuals to teams, partnerships, and total participation are necessary from health care groups for improved prognostics using measurement analysis. Proprietary measurement analysis software is available for calibrated, pixel-to-pixel measurements of angles and distances in digital images. Feature size, count, and color are determinable on an absolute and comparative basis. Although changes in images of histomics are based on complex and numerous factors, the variation of changes in imaging analysis to correlations of time, extent, and progression of illness can be derived. Statistical methods are preferred. Applications of the proprietary measurement software are available for any imaging platform. Quantification of results provides improved categorization of illness towards better health. As health care practitioners try to use quantified measurement data for patient diagnosis, the techniques reported can be used to track and isolate causes better. Comparisons, norms, and trends are available from processing of measurement data which is obtained easily and quickly from Scientific Software and methods. Example results for the class actions of Preventative and Corrective Care in Ophthalmology and Dermatology, respectively, are provided. Improved and quantified diagnosis can lead to better health and lower costs associated with health care. Systems support improvements towards Lean and Six Sigma affecting all branches of biology and medicine. As an example for use of statistics, the major types of variation involving a study of Bone Mineral Density (BMD) are examined. Typically, special causes in medicine relate to illness and activities; whereas, common causes are known to be associated with gender, race, size, and genetic make-up. Such a strategy of Continuous Process Improvement (CPI) involves comparison of patient results to baseline data using F-statistics. Self-parings over time are also useful. Special and common causes are identified apart from aging in applying the statistical methods. In the future, implementation of imaging measurement methods by research staff, doctors, and concerned patient partners result in improved health diagnosis, reporting, and cause determination. The long-term prospects for quantified measurements are better quality in imaging analysis with applications of higher utility for heath care providers.

  11. Parallel Algorithms and Software for Nuclear, Energy, and Environmental Applications. Part II: Multiphysics Software

    SciTech Connect

    Derek Gaston; Luanjing Guo; Glen Hansen; Hai Huang; Richard Johnson; Dana Knoll; Chris Newman; Hyeong Kae Park; Robert Podgorney; Michael Tonks; Richard Williamson

    2012-09-01

    This paper is the second part of a two part sequence on multiphysics algorithms and software. The first [1] focused on the algorithms; this part treats the multiphysics software framework and applications based on it. Tight coupling is typically designed into the analysis application at inception, as such an application is strongly tied to a composite nonlinear solver that arrives at the final solution by treating all equations simultaneously. The application must also take care to minimize both time and space error between the physics, particularly if more than one mesh representation is needed in the solution process. This paper presents an application framework that was specifically designed to support tightly coupled multiphysics analysis. The Multiphysics Object Oriented Simulation Environment (MOOSE) is based on the Jacobian-free Newton-Krylov (JFNK) method combined with physics-based preconditioning to provide the underlying mathematical structure for applications. The report concludes with the presentation of a host of nuclear, energy, and environmental applications that demonstrate the efficacy of the approach and the utility of a well-designed multiphysics framework.

  12. A high-resolution unconventional imager for missile defense applications

    NASA Astrophysics Data System (ADS)

    1995-05-01

    During this reporting period a detailed MathCAD (trademark) - based ASI signal performance model was completed and checked. Also, the laser energy requirements were estimated for the three potential ASI military applications reported last period. The results were discouragingly high, ranging from 35 Joules to 135 Joules per pulse (The laser pulses N times to collect an N x N pixel image). This led to a careful analysis of tradeoffs affecting transmit energy requirements. A significant understanding resulted: the ASI imager works extremely well (from a laser energy point of view) when very small objects like missiles or space debris are imaged over large distances. Also, laser energy requirements decrease when the transmitter wavelength is increased. In each case the smallest speckle lobe increases in size and more photons are collected as the subaperture size is scaled accordingly. Interestingly, this suggests that ASI can fill a very unique niche where radar cannot supply the spatial resolution and conventional optics are too bulky and expensive to perform long-range non-cooperative target identification of small targets. Hence ASI may be 'the only game in town' as an adjunct sensor for Patriot missile batteries, as a non-cooperative target I.D. sensor on fighter aircraft protecting a Navy carrier group or as a space debris imager protecting the space shuttle or space station.

  13. Study of optical techniques for the Ames unitary wind tunnel: Digital image processing, part 6

    NASA Technical Reports Server (NTRS)

    Lee, George

    1993-01-01

    A survey of digital image processing techniques and processing systems for aerodynamic images has been conducted. These images covered many types of flows and were generated by many types of flow diagnostics. These include laser vapor screens, infrared cameras, laser holographic interferometry, Schlieren, and luminescent paints. Some general digital image processing systems, imaging networks, optical sensors, and image computing chips were briefly reviewed. Possible digital imaging network systems for the Ames Unitary Wind Tunnel were explored.

  14. Applications and challenges of digital pathology and whole slide imaging.

    PubMed

    Higgins, C

    2015-07-01

    Virtual microscopy is a method for digitizing images of tissue on glass slides and using a computer to view, navigate, change magnification, focus and mark areas of interest. Virtual microscope systems (also called digital pathology or whole slide imaging systems) offer several advantages for biological scientists who use slides as part of their general, pharmaceutical, biotechnology or clinical research. The systems usually are based on one of two methodologies: area scanning or line scanning. Virtual microscope systems enable automatic sample detection, virtual-Z acquisition and creation of focal maps. Virtual slides are layered with multiple resolutions at each location, including the highest resolution needed to allow more detailed review of specific regions of interest. Scans may be acquired at 2, 10, 20, 40, 60 and 100 × or a combination of magnifications to highlight important detail. Digital microscopy starts when a slide collection is put into an automated or manual scanning system. The original slides are archived, then a server allows users to review multilayer digital images of the captured slides either by a closed network or by the internet. One challenge for adopting the technology is the lack of a universally accepted file format for virtual slides. Additional challenges include maintaining focus in an uneven sample, detecting specimens accurately, maximizing color fidelity with optimal brightness and contrast, optimizing resolution and keeping the images artifact-free. There are several manufacturers in the field and each has not only its own approach to these issues, but also its own image analysis software, which provides many options for users to enhance the speed, quality and accuracy of their process through virtual microscopy. Virtual microscope systems are widely used and are trusted to provide high quality solutions for teleconsultation, education, quality control, archiving, veterinary medicine, research and other fields. PMID:25978139

  15. Acceleration of iterative image reconstruction for x-ray imaging for security applications

    NASA Astrophysics Data System (ADS)

    Degirmenci, Soysal; Politte, David G.; Bosch, Carl; Tricha, Nawfel; O'Sullivan, Joseph A.

    2015-03-01

    Three-dimensional image reconstruction for scanning baggage in security applications is becoming increasingly important. Compared to medical x-ray imaging, security imaging systems must be designed for a greater variety of objects. There is a lot of variation in attenuation and nearly every bag scanned has metal present, potentially yielding significant artifacts. Statistical iterative reconstruction algorithms are known to reduce metal artifacts and yield quantitatively more accurate estimates of attenuation than linear methods. For iterative image reconstruction algorithms to be deployed at security checkpoints, the images must be quantitatively accurate and the convergence speed must be increased dramatically. There are many approaches for increasing convergence; two approaches are described in detail in this paper. The first approach includes a scheduled change in the number of ordered subsets over iterations and a reformulation of convergent ordered subsets that was originally proposed by Ahn, Fessler et. al.1 The second approach is based on varying the multiplication factor in front of the additive step in the alternating minimization (AM) algorithm, resulting in more aggressive updates in iterations. Each approach is implemented on real data from a SureScanTM x 1000 Explosive Detection System? and compared to straightforward implementations of the alternating minimization algorithm of O'Sullivan and Benac2 with a Huber-type edge-preserving penalty, originally proposed by Lange.3

  16. Open-box spectral clustering: applications to medical image analysis.

    PubMed

    Schultz, Thomas; Kindlmann, Gordon L

    2013-12-01

    Spectral clustering is a powerful and versatile technique, whose broad range of applications includes 3D image analysis. However, its practical use often involves a tedious and time-consuming process of tuning parameters and making application-specific choices. In the absence of training data with labeled clusters, help from a human analyst is required to decide the number of clusters, to determine whether hierarchical clustering is needed, and to define the appropriate distance measures, parameters of the underlying graph, and type of graph Laplacian. We propose to simplify this process via an open-box approach, in which an interactive system visualizes the involved mathematical quantities, suggests parameter values, and provides immediate feedback to support the required decisions. Our framework focuses on applications in 3D image analysis, and links the abstract high-dimensional feature space used in spectral clustering to the three-dimensional data space. This provides a better understanding of the technique, and helps the analyst predict how well specific parameter settings will generalize to similar tasks. In addition, our system supports filtering outliers and labeling the final clusters in such a way that user actions can be recorded and transferred to different data in which the same structures are to be found. Our system supports a wide range of inputs, including triangular meshes, regular grids, and point clouds. We use our system to develop segmentation protocols in chest CT and brain MRI that are then successfully applied to other datasets in an automated manner. PMID:24051776

  17. Development of photoacoustic imaging technology overlaid on ultrasound imaging and its clinical application

    NASA Astrophysics Data System (ADS)

    Ishihara, Miya; Tsujita, Kazuhiro; Horiguchi, Akio; Irisawa, Kaku; Komatsu, Tomohiro; Ayaori, Makoto; Hirasawa, Takeshi; Kasamatsu, Tadashi; Hirota, Kazuhiro; Tsuda, Hitoshi; Ikewaki, Katsunori; Asano, Tomohiko

    2015-03-01

    Purpose: Photoacoustic imaging (PAI) enables one to visualize the distribution of hemoglobin and acquire a map of microvessels without using contrast agents. The purpose of our study is to develop a clinically applicable PAI system integrated with a clinical ultrasound (US) array system with handheld PAI probes providing coregistered PAI and US images. Clinical research trials were performed to evaluate the performance and feasibility of clinical value. Materials and Methods: We developed two types of handheld PAI probes: a linear PAI probe combining a conventional linear-array US probe with optical illumination and a transrectal ultrasonography (TRUS)-type PAI probe. We performed experiments with Japanese white rabbits and conducted clinical research trials of urology and vascular medicine with the approval of the medical human ethics committee of the National Defense Medical College. Results: We successfully acquired high-dynamic-range images of the vascular network ranging from capillaries to landmark arteries and identified the femoral vein, deep femoral vein, and great saphenous vein of rabbits. These major vessels in the rabbits groin are surrounded with microvessels connected to each other. Periprostatic microvessels were monitored during radical prostatectomy for localized prostate cancer and they were colocalized with nerve fibers, and their distribution was consistent with the corresponding PAI. The TRUS-type PAI probe clearly demonstrated the location and extent of the neurovascular bundle (NVB) better than does TRUS alone. Conclusions: The system, which can obtain a PAI, a US image, and a merged image, was innovatively designed so that medical doctors can easily find the location without any prior knowledge or extended skills to analyze the obtained images. Our pilot feasibility study confirms that PAI could be an imaging modality useful in the screening study and diagnostic biopsy.

  18. Passive millimeter-wave imaging system for automobile applications

    NASA Astrophysics Data System (ADS)

    Aoki, Yutaka; Miyake, Yasuyuki; Hoshino, Koichi

    2005-11-01

    In this paper we describe the capability of passive millimeter-wave imaging in obstacle width and clearance measurement for automobile applications. To confirm the capabilities, a passive millimeter-wave imaging (PMMWI) test system has been developed. This test system employs the Dicke configuration, which includes a 150mm diameter antenna, a PIN switch, a reference terminator, a 50dB RF amplifier, a 76-77GHz BPF, a W-band detector, a lock-in-amplifier, an elevation and azimuth scanning stage, and a PC for scan control and data acquisition. A van and sedans are utilized as targets. The vehicle width and the clearance between two vehicles measured from PMMWIs show fairly good agreement with real values. Therefore, the capability of PMMWI in width and clearance measurement is confirmed. In addition, the experimentally obtained PMMWIs of vehicles represent the vehicle shapes. This result indicates that obstacle distinction is possible by PMMWI.

  19. Linear polarization difference imaging and its potential applications.

    PubMed

    Nan, Zeng; Xiaoyu, Jiang; Qiang, Gao; Yonghong, He; Hui, Ma

    2009-12-10

    We demonstrate a novel linear polarization imaging technique and its potential application in dermatology. This technique records a series of images corresponding to different combinations of illumination and detection polarization and calculates intensity differences between orthogonal detection polarizations pixel by pixel. Fitting the polarization difference data to an analytical expression of the incident and detection polarization angles results in two new parameters, G and (phi3)/2. It is shown that G is strongly correlated to the order of alignment of the fibrous structure in the sample, and (phi3)/2 represents the angle of orientation of the fibers. Preliminary clinical testing implies that this method may be applied for medical diagnosis of skin diseases. PMID:20011013

  20. Clinical Application of Image-Based CFD for Cerebral Aneurysms

    PubMed Central

    Cebral, JR; Mut, F; Sforza, D; Löhner, R; Scrivano, E; Lylyk, P; Putman, CM

    2010-01-01

    During the last decade, the convergence of medical imaging and computational modeling technologies has enabled tremendous progress in the development and application of image-based computational fluid dynamics modeling of patient-specific blood flows. These techniques have been used for studying the basic mechanisms involved in the initiation and progression of vascular diseases, for studying possible ways to improve the diagnosis and evaluation of patients by incorporating hemodynamics information to the anatomical data typically available, and for the development of computational tools that can be used to improve surgical and endovascular treatment planning. However, before these technologies can have a significant impact on the routine clinical practice, it is still necessary to demonstrate the connection between the extra information provided by the models and the natural progression of vascular diseases and the outcome of interventions. This paper summarizes some of our contributions in this direction, focusing in particular on cerebral aneurysms. PMID:21822465

  1. Dosimetric characterization and output verification for conical brachytherapy surface applicators. Part I. Electronic brachytherapy source

    PubMed Central

    Fulkerson, Regina K.; Micka, John A.; DeWerd, Larry A.

    2014-01-01

    Purpose: Historically, treatment of malignant surface lesions has been achieved with linear accelerator based electron beams or superficial x-ray beams. Recent developments in the field of brachytherapy now allow for the treatment of surface lesions with specialized conical applicators placed directly on the lesion. Applicators are available for use with high dose rate (HDR) 192Ir sources, as well as electronic brachytherapy sources. Part I of this paper will discuss the applicators used with electronic brachytherapy sources; Part II will discuss those used with HDR 192Ir sources. Although the use of these applicators has gained in popularity, the dosimetric characteristics including depth dose and surface dose distributions have not been independently verified. Additionally, there is no recognized method of output verification for quality assurance procedures with applicators like these. Existing dosimetry protocols available from the AAPM bookend the cross-over characteristics of a traditional brachytherapy source (as described by Task Group 43) being implemented as a low-energy superficial x-ray beam (as described by Task Group 61) as observed with the surface applicators of interest. Methods: This work aims to create a cohesive method of output verification that can be used to determine the dose at the treatment surface as part of a quality assurance/commissioning process for surface applicators used with HDR electronic brachytherapy sources (Part I) and 192Ir sources (Part II). Air-kerma rate measurements for the electronic brachytherapy sources were completed with an Attix Free-Air Chamber, as well as several models of small-volume ionization chambers to obtain an air-kerma rate at the treatment surface for each applicator. Correction factors were calculated using MCNP5 and EGSnrc Monte Carlo codes in order to determine an applicator-specific absorbed dose to water at the treatment surface from the measured air-kerma rate. Additionally, relative dose measurements of the surface dose distributions and characteristic depth dose curves were completed in-phantom. Results: Theoretical dose distributions and depth dose curves were generated for each applicator and agreed well with the measured values. A method of output verification was created that allows users to determine the applicator-specific dose to water at the treatment surface based on a measured air-kerma rate. Conclusions: The novel output verification methods described in this work will reduce uncertainties in dose delivery for treatments with these kinds of surface applicators, ultimately improving patient care. PMID:24506635

  2. Dosimetric characterization and output verification for conical brachytherapy surface applicators. Part I. Electronic brachytherapy source

    SciTech Connect

    Fulkerson, Regina K., E-mail: rmkenned@gmail.com; Micka, John A.; DeWerd, Larry A. [Department of Medical Physics, University of Wisconsin–Madison, Madison, Wisconsin 53705 (United States)] [Department of Medical Physics, University of Wisconsin–Madison, Madison, Wisconsin 53705 (United States)

    2014-02-15

    Purpose: Historically, treatment of malignant surface lesions has been achieved with linear accelerator based electron beams or superficial x-ray beams. Recent developments in the field of brachytherapy now allow for the treatment of surface lesions with specialized conical applicators placed directly on the lesion. Applicators are available for use with high dose rate (HDR){sup 192}Ir sources, as well as electronic brachytherapy sources. Part I of this paper will discuss the applicators used with electronic brachytherapy sources; Part II will discuss those used with HDR {sup 192}Ir sources. Although the use of these applicators has gained in popularity, the dosimetric characteristics including depth dose and surface dose distributions have not been independently verified. Additionally, there is no recognized method of output verification for quality assurance procedures with applicators like these. Existing dosimetry protocols available from the AAPM bookend the cross-over characteristics of a traditional brachytherapy source (as described by Task Group 43) being implemented as a low-energy superficial x-ray beam (as described by Task Group 61) as observed with the surface applicators of interest. Methods: This work aims to create a cohesive method of output verification that can be used to determine the dose at the treatment surface as part of a quality assurance/commissioning process for surface applicators used with HDR electronic brachytherapy sources (Part I) and{sup 192}Ir sources (Part II). Air-kerma rate measurements for the electronic brachytherapy sources were completed with an Attix Free-Air Chamber, as well as several models of small-volume ionization chambers to obtain an air-kerma rate at the treatment surface for each applicator. Correction factors were calculated using MCNP5 and EGSnrc Monte Carlo codes in order to determine an applicator-specific absorbed dose to water at the treatment surface from the measured air-kerma rate. Additionally, relative dose measurements of the surface dose distributions and characteristic depth dose curves were completed in-phantom. Results: Theoretical dose distributions and depth dose curves were generated for each applicator and agreed well with the measured values. A method of output verification was created that allows users to determine the applicator-specific dose to water at the treatment surface based on a measured air-kerma rate. Conclusions: The novel output verification methods described in this work will reduce uncertainties in dose delivery for treatments with these kinds of surface applicators, ultimately improving patient care.

  3. The costs of nurse turnover, part 2: application of the Nursing Turnover Cost Calculation Methodology.

    PubMed

    Jones, Cheryl Bland

    2005-01-01

    This is the second article in a 2-part series focusing on nurse turnover and its costs. Part 1 (December 2004) described nurse turnover costs within the context of human capital theory, and using human resource accounting methods, presented the updated Nursing Turnover Cost Calculation Methodology. Part 2 presents an application of this method in an acute care setting and the estimated costs of nurse turnover that were derived. Administrators and researchers can use these methods and cost information to build a business case for nurse retention. PMID:15647669

  4. A novel ultra-high speed camera for digital image processing applications

    Microsoft Academic Search

    A. Hijazi; V. Madhavan

    2008-01-01

    Multi-channel gated-intensified cameras are commonly used for capturing images at ultra-high frame rates. The use of image intensifiers reduces the image resolution and increases the error in applications requiring high-quality images, such as digital image correlation. We report the development of a new type of non-intensified multi-channel camera system that permits recording of image sequences at ultra-high frame rates at

  5. Clinical positron emission tomography/magnetic resonance imaging applications.

    PubMed

    von Schulthess, Gustav K; Kuhn, Felix Pierre; Kaufmann, Philipp; Veit-Haibach, Patrick

    2013-01-01

    Although clinical positron emission tomography (PET)/computed tomography (CT) applications were obvious and have completely replaced PET in oncology, clinical applications of PET/magnetic resonance (MR) are currently not clearly defined. This is due to the lack of clinical data, which is mainly because PET/MR technology is not clinically mature at this point. Open issues are technical and concern ease of obtaining PET attenuation correction maps, dealing with, for example, MR surface coil metal in the PET field-of-view and appropriate workflows leading to a cost-effective examination. All issues can be circumvented by using a shuttle-connected PET/CT-MR system, but the penalty is that simultaneous PET and MR imaging are not possible and potential motion between examinations may occur. Clinically, some systems installed worldwide start to have a reasonable bulk of clinical data. Preliminary results suggest that in oncology, PET/MR may have advantages over PET/CT in head and neck imaging. In liver imaging, more PET-positive lesions are seen on MR than on CT, but that does not mean that PET/MR is superior to PET/CT. Possibly in some settings where a contrast-enhanced PET/CT is needed to be diagnostic, PET/MR can be done without contrast media. Although PET/CT has virtually no role in brain imaging, this may be an important domain for PET/MR, particularly in dementia imaging. The role of PET/MR in the heart is as yet undefined, and much research will have to be done to elucidate this role. At this point, it is also not clear where the simultaneity afforded by a fully integrated PET/MR is really needed. Sequential data acquisition even on separate systems and consecutive software image fusion may well be appropriate. With the increasing installed base of systems, clinical data will be forthcoming and define more clearly where there is clinical value in PET/MR at an affordable price. PMID:23178084

  6. Application-oriented region of interest based image compression using bit-allocation optimization

    NASA Astrophysics Data System (ADS)

    Zhu, Yuanping

    2015-01-01

    Region of interest (ROI) based image compression can offer a high image-compression ratio along with high quality in the important regions of the image. For many applications, stable compression quality is required for both the ROIs and the images. However, image compression does not consider information specific to the application and cannot meet this requirement well. This paper proposes an application-oriented ROI-based image-compression method using bit-allocation optimization. Unlike typical methods that define bit-rate parameters empirically, the proposed method adjusts the bit-rate parameters adaptively to both images and ROIs. First, an application-dependent optimization model is constructed. The relationship between the compression parameters and the image content is learned from a training image set. Image redundancy is used to measure the compression capability of image content. Then, during compression, the global bit rate and the ROI bit rate are adjusted in the images and ROIs, respectively-supported by the application-dependent information in the optimization model. As a result, stable compression quality is assured in the applications. Experiments with two different applications showed that quality deviation in the reconstructed images decreased, verifying the effectiveness of the proposed method.

  7. Perfusion CT imaging of the liver: review of clinical applications

    PubMed Central

    O?ul, Hayri; Kantarc?, Mecit; Genç, Berhan; Pirimo?lu, Berhan; Çullu, Ne?at; K?zrak, Ye?im; Y?lmaz, Ömer; Karabulut, Nevzat

    2014-01-01

    Perfusion computed tomography (CT) has a great potential for determining hepatic and portal blood flow; it offers the advantages of quantitative determination of lesion hemodynamics, distinguishing malignant and benign processes, as well as providing morphological data. Many studies have reported the use of this method in the assessment of hepatic tumors, hepatic fibrosis associated with chronic liver disease, treatment response following radiotherapy and chemotherapy, and hepatic perfusion changes after radiological or surgical interventions. The main goal of liver perfusion imaging is to improve the accuracy in the characterization of liver disorders. In this study, we reviewed the clinical application of perfusion CT in various hepatic diseases. PMID:24834487

  8. Hybrid lidar radar receiver for underwater imaging applications

    NASA Astrophysics Data System (ADS)

    Seetamraju, Madhavi; Gurjar, Rajan; Squillante, Michael; Derderian, Jeffrey P.

    2009-05-01

    In this work, we present research performed to improve the receiver characteristics for underwater imaging applications using the hybrid lidar-radar detection technique. We report the development of the next-generation coherent heterodyne receiver using modulation of the optical receiver's amplifier gain. Significant advantages in the receiver specifications are achieved using a large-area, high gain, low-noise silicon avalanche photodiode (APD) as the photodetector cum frequency mixer-demodulator. We demonstrate that heterodyne detection by gain modulation of APD can be used to increase the signal-to-noise ratio, detection sensitivity and bandwidth for the hybrid receiver system.

  9. Human-computer interaction for the generation of image processing applications

    E-print Network

    Paris-Sud XI, Université de

    Human-computer interaction for the generation of image processing applications R´egis Clouard, 14050 Caen, FRANCE Abstract The development of customized image processing applications is time con generation system oriented towards producing image processing software programs. The description is focused

  10. Classification and Characterization of Image Acquisition for 3D Scene Visualization and Reconstruction Applications

    Microsoft Academic Search

    Shou Kang Wei; Fay Huang; Reinhard Klette

    2000-01-01

    This paper discusses the techniques of image acquisition for 3D scene visualization andreconstruction applications (3DSVR). The existing image acquisition approaches in3DSVR applications are briefly reviewed. There are still lacks of the studies aboutwhat principles are essential in the design and how we can characterize the limitationsof an image acquisition model in a formal way. This paper addresses so me of

  11. Classification of Radiographs in the `Image Retrieval in Medical Applications' -System

    E-print Network

    Keysers, Daniel

    ) searching for representative images of known diseases and (3) scientific and educational studies on X-rayClassification of Radiographs in the `Image Retrieval in Medical Applications' - System (IRMA) J, 1998], but their applicability to medical image retrieval is still to be shown. #12;Furthermore

  12. Diffusion-weighted imaging in cancer: physical foundations and applications of restriction spectrum imaging.

    PubMed

    White, Nathan S; McDonald, Carrie; McDonald, Carrie R; Farid, Niky; Kuperman, Josh; Karow, David; Schenker-Ahmed, Natalie M; Bartsch, Hauke; Rakow-Penner, Rebecca; Holland, Dominic; Shabaik, Ahmed; Bjørnerud, Atle; Hope, Tuva; Hattangadi-Gluth, Jona; Liss, Michael; Parsons, J Kellogg; Chen, Clark C; Raman, Steve; Margolis, Daniel; Reiter, Robert E; Marks, Leonard; Kesari, Santosh; Mundt, Arno J; Kane, Christopher J; Kaine, Christopher J; Carter, Bob S; Bradley, William G; Dale, Anders M

    2014-09-01

    Diffusion-weighted imaging (DWI) has been at the forefront of cancer imaging since the early 2000s. Before its application in clinical oncology, this powerful technique had already achieved widespread recognition due to its utility in the diagnosis of cerebral infarction. Following this initial success, the ability of DWI to detect inherent tissue contrast began to be exploited in the field of oncology. Although the initial oncologic applications for tumor detection and characterization, assessing treatment response, and predicting survival were primarily in the field of neurooncology, the scope of DWI has since broadened to include oncologic imaging of the prostate gland, breast, and liver. Despite its growing success and application, misconceptions about the underlying physical basis of the DWI signal exist among researchers and clinicians alike. In this review, we provide a detailed explanation of the biophysical basis of diffusion contrast, emphasizing the difference between hindered and restricted diffusion, and elucidating how diffusion parameters in tissue are derived from the measurements via the diffusion model. We describe one advanced DWI modeling technique, called restriction spectrum imaging (RSI). This technique offers a more direct in vivo measure of tumor cells, due to its ability to distinguish separable pools of water within tissue based on their intrinsic diffusion characteristics. Using RSI as an example, we then highlight the ability of advanced DWI techniques to address key clinical challenges in neurooncology, including improved tumor conspicuity, distinguishing actual response to therapy from pseudoresponse, and delineation of white matter tracts in regions of peritumoral edema. We also discuss how RSI, combined with new methods for correction of spatial distortions inherent in diffusion MRI scans, may enable more precise spatial targeting of lesions, with implications for radiation oncology and surgical planning. See all articles in this Cancer Research section, "Physics in Cancer Research." PMID:25183788

  13. Performance assessment of time-domain optical brain imagers, part 1: basic instrumental performance protocol.

    PubMed

    Wabnitz, Heidrun; Taubert, Dieter Richard; Mazurenka, Mikhail; Steinkellner, Oliver; Jelzow, Alexander; Macdonald, Rainer; Milej, Daniel; Sawosz, Piotr; Kacprzak, Micha?; Liebert, Adam; Cooper, Robert; Hebden, Jeremy; Pifferi, Antonio; Farina, Andrea; Bargigia, Ilaria; Contini, Davide; Caffini, Matteo; Zucchelli, Lucia; Spinelli, Lorenzo; Cubeddu, Rinaldo; Torricelli, Alessandro

    2014-08-01

    Performance assessment of instruments devised for clinical applications is of key importance for validation and quality assurance. Two new protocols were developed and applied to facilitate the design and optimization of instruments for time-domain optical brain imaging within the European project nEUROPt. Here, we present the "Basic Instrumental Performance" protocol for direct measurement of relevant characteristics. Two tests are discussed in detail. First, the responsivity of the detection system is a measure of the overall efficiency to detect light emerging from tissue. For the related test, dedicated solid slab phantoms were developed and quantitatively spectrally characterized to provide sources of known radiance with nearly Lambertian angular characteristics. The responsivity of four time-domain optical brain imagers was found to be of the order of 0.1 m² sr. The relevance of the responsivity measure is demonstrated by simulations of diffuse reflectance as a function of source-detector separation and optical properties. Second, the temporal instrument response function (IRF) is a critically important factor in determining the performance of time-domain systems. Measurements of the IRF for various instruments were combined with simulations to illustrate the impact of the width and shape of the IRF on contrast for a deep absorption change mimicking brain activation. PMID:25121479

  14. Automatic image segmentation by graph cuts for bio-medical applications

    Microsoft Academic Search

    R. Ramya; K. B. Jayanthi

    2012-01-01

    Graph cut image partitioning is used to segment any type of the image data. The image data is transformed by a kernel function so that the piecewise constant model of the graph cut formulation becomes applicable. The method affords an effective alternative to complex modeling of the original image data while taking advantage of the computational benefits of graph cuts.

  15. Image restoration in X-ray microscopy: PSF determination and biological applications

    Microsoft Academic Search

    J. Lehr; Jean-baptiste Sibarita; Jean-marc Chassery

    1998-01-01

    We show that digital image processing methods can be applied to enhance the quality of X-ray microscopic images. One application of X-ray microscopy is imaging of biological specimens in their natural aqueous environment. Since X radiation can introduce structural changes in these objects when observing them at room temperature, it is sometimes necessary to take images with short exposure time.

  16. PATCH-BASED IMAGE INTERPOLATION: ALGORITHMS AND APPLICATIONS Lane Dept. of Computer Science and Electrical Engineering

    E-print Network

    Li, Xin

    advances in adaptive sparse representations and nonlocal image modeling, we propose a patch-based imagePATCH-BASED IMAGE INTERPOLATION: ALGORITHMS AND APPLICATIONS Xin Li Lane Dept. of Computer Science the potential of the proposed algorithms. Index Terms--image interpolation, patch-based models, spatial point

  17. College Applicants Who Took the COMPASS Test in 2006 (Part 1): Applicant Data

    ERIC Educational Resources Information Center

    Preuss, Michael

    2008-01-01

    The purpose of this ex post facto investigation was to determine the characteristics of and need for developmental education in the college applicant pool in 2006. Demographic data and COMPASS placement test results were gathered for the 1,079 applicants in 2006 who had complete records. These data were considered in the aggregate and in subsets…

  18. A new method of channel shortening with applications to discrete multitone (DMT) systems, part I: theory

    E-print Network

    Iyengar, Garud

    A new method of channel shortening with applications to discrete multi­tone (DMT) systems, part I the problem of channel shortening (a.k.a. the TEQ problem) for discrete multi­tone (DMT) systems. This paper system like the Discrete Multi­tone (DMT) [2] relies on the fact that the length of ``e

  19. Nonserial Dynamic Programming with Applications in Smart Home Appliances Scheduling Part II: Nonserial Dynamic Programming

    E-print Network

    Johansson, Karl Henrik

    Nonserial Dynamic Programming with Applications in Smart Home Appliances Scheduling ­ Part II) is presented. The problem in this paper generalizes the smart home appliances scheduling problem introduced the following smart home appliances scheduling problem described in the companion paper [3], as the later

  20. Daisy Chaining Based Visual Servo Control Part II: Extensions, Applications and Open Problems

    Microsoft Academic Search

    G. Hu; N. Gans; S. Mehta; W. E. Dixon

    2007-01-01

    In this paper, the open problems and applications of a daisy chaining visual servo control strategy are given. This paper is Part II of Hu et al. (2007) in which a tracking problem using the daisy chaining strategy is addressed. The main idea of the daisy chaining strategy is to use multi-view geometry to relate coordinate frames attached to the