BackgroundThe International Commission on Radiological Protection (ICRP) recommended annual occupational dose limit is 20 mSv. Cancer mortality in Japanese A-bomb survivors exposed to less than 20 mSv external radiation in 1945 was analysed previously, using a latency model with non-linear dose response. Questions were raised regarding ...

Mar 15, 2004 ... xchanges per Cell ... Non-cancer Mortality Risks (A-bomb survivors) ... only a small area of the lens for subcapsular or cortical cataracts ...

A draft manuscript is being prepared that describes ways to improve estimates of risk from radiation that have been derived from A-bomb survivors. The work has been published in the journal Radiation Research volume 169, pages 87-98....

Radiation-induced chromosome aberrations were found to persist in cultured peripheral blood lymphocytes derived from Hiroshima and Nagasaki A-bomb survivors long after their radiation exposure. Earlier observations that the frequency of cells with chromos...

The prevalence of roentgenologically-detected foregin bodies among atomic bomb survivors was studied as an indicator of the A-bomb blast effects. Acupuncture was studied as an indicator of possible A-bomb-related abnormalities for which it was administere...

Progress is reported on a project to analyze the level of circulating immune complexes in atomic bomb survivors. (ERA citation 09:050609)

BackgroundAnalyses of Japanese A-bomb survivors' cancer mortality risks are used to establish recommended annual dose limits, currently set at 1 mSv (public) and 20 mSv (occupational). Do radiation doses below 20 mSv have significant impact on cancer mortality in Japanese A-bomb survivors, and is the dose-response ...

The 1957 and 1958 incidence of neoplasms among the survivors of the Hiroshima A-bomb varies directly with radiation dose, insofar as it may be inferred from distance from the hypocenter at exposure. The incidence of all malignant neoplasms among the survivors who were within 1000 m is more than four times that of the ...

A substantial discrepancy exists between the measured values for thermal neutron activation and the values calculated using the new A-bomb dosimetry system, DS86. As part of a joint US-Japan effort aimed at resolving this discrepancy, we have shown that (...

... radiation effectsSG:� Heterogeneity in the chance of surviving general heat and blast effectsThese are not unrelated since radiation damage could affect the chance of recovering from more general injuries,...

The hospitals and clinics responsible for radiation therapy reported by ABCC-JNIH Adult Health Study subjects were surveyed to confirm treatment and estimate doses they received. Of 426 cases, 137 were documented by hospital records. Their ABCC medical re...

A study of nonbacterial thrombotic endocarditis was carried out in a series of 3404 autopsies performed upon A-bomb survivors in Hiroshima in the period 1953--70. The prevalence of the lesion was 2.4%, with a greater frequency among the elderly and among ...

Samples collected from 832 A-bomb survivors were analyzed for natural killer activity, interleukin production, interferon production, serum interferon levels, and circulating immune complex levels. The most striking finding was a significant radiation-sex interaction for NK activity. The NK of females exposed to 100+ rads was decreased compared to those ...

The effects of exposure to ionizing radiation on skin cancer incidence in a cohort of atomic bomb (A-bomb) survivors in the Nagasaki Extended Life Span Study (LSS-E85) sample have been investigated. Among 25,942 exposed survivors at risk whose DS86 dose e...

The present study extends the previous report on cancer mortality among atomic bomb survivors by adding data from four additional years of follow-up (1979 - 82) and by expanding the cohort (now designated LSS-E85) to include 11,393 Nagasaki survivors loca...

A-bomb survivor data have been generally accepted as applicable. Also, the initial radiations have tended to be accepted as the dominant radiation source for all survivors. There was general acceptance of the essential reliability of both the biological effects data and the causative radiation dose values. There are considerations ...

This report has two aims: (1) to describe and analyze the age/time patterns of excess cancer risk in the atomic bomb survivor cohort followed up by RERF, and (2) to describe statistical methods which are used in RERF's analyses of data on mortality and mo...

Two cases of acute leukemia in heavily exposed atomic bomb survivors following postoperative exp 60 Co radiotherapy for breast cancer are presented. Case 1, a female who received an estimated dose of 364 rad from the A-bomb at the age of 22, was diagnosed...

The relationship of ionizing radiation to the age-related ophthalmologic findings of the 1978-80 ophthalmologic examination of the atomic bomb (A-bomb) survivors of Hiroshima and Nagasaki has been reanalyzed using Dosimetry System 1986 eye organ dose esti...

Survey of hospitals and clinics where atomic bomb survivors and their comparisons reported having received radiation therapy confirmed that 137 were so treated. The malignancies of five subjects were possibly related to their earlier radiation therapy rather than their atomic bomb radiation exposure, stressing the importance of recording all medical X-ray exposures as a ...

In an analysis of data obtained from the Life Span Study, a follow-up study of a fixed population of 73,330 atomic bomb survivors in Hiroshima and Nagasaki, the slope of a linear dose response between the estimated dose of ionizing radiation and leukemia ...

The relationship between atomic bomb exposure and the occurrence of multiple myeloma has been evaluated in a fixed cohort of approximately 100,000 A-bomb survivors and nonexposed controls during the period from October 1950 to December 1976. Analysis of t...

The ABCC autopsy series for 1961--70 provides evidence of an excess of lung cancer among A-bomb survivors exposed to 200 rad or more of whole-body radiation. A re-examination of the same material with the addition of information on smoking history and occ...

The incidence of lung cancer during 1950 - 80 in a cohort of Japanese atomic bomb survivors and controls was investigated. A total of 1,057 cases were identified; 608 of these diagnoses were based on some form of histopathologic examination, and 442 were ...

A series of tests of immunologic function were used in assessing the immune status of individuals who survived the atomic bombs in Japan in 1945. A-bomb survivors (n=189) residing in the US were recruited to participate in the study. Survivors exposed to ...

This report re-examines the relationship of radiation dose to the occurrence of cataracts among 1742 a-bomb survivors seen in the years 1963-1964 for whom the degree of epilation and Dosimetry System 1986 (DS86) doses are known. Of these, 67 had cataracts.

This study examines 51 stories of health, shared by people who survived the wartime trauma of Hiroshima and Pearl Harbor, seeking to identify turning points that moved participants along over their lifetime. The central turning point for Hiroshima survivors was "becoming Hibabusha (A-bomb survivor)" and for Pearl Harbor ...

Incidence and mortality risks of radiation-associated leukaemia are surveyed in the Japanese atomic bomb (A-bomb) survivors exposed in early childhood and in utero. Leukaemia incidence and mortality risks are also surveyed in 16 other studies of persons who received appreciable doses of ionizing radiation in the course of treatment in childhood and for ...

Data on Hiroshima and Nagasaki A-bomb survivors are used to investigate, for each city, possible circular asymmetry in cancer mortality around the hypocenter. Using the Cox regression method and controlling for age ATB, sex, followup year, distance from the hypocenter, and type of shielding, it is found that in Hiroshima cancer mortality was significantly ...

36Cl is a long-lived radioisotope, which, because it is created mainly through a thermal neutron capture process by 35Cl, may be used to estimate the strength of thermal neutron flux from A-bombs or nuclear fuel facilities. The 36Cl contents in granite samples from the Hiroshima A-bomb site have been measured by the Cl-36 accelerator mass spectrometry ...

Complete blood counting on 131 A-bombed survivors in Fukuoka and Saga Prefectures and bone marrow function test by the use of cobalt-chlorophyllin on 40 survivors were carried out in 1961. The hematological examination revealed a slight, insignificant decrease in hemoglobin, red blood cells, thrombocytes, and leukocytes, and a ...

By drawing a distinction between A-bomb survivors with and without bomb-related injuries, it was possible to see that instead of the Life Span Study (LSS) cohort being a normal, homogenous population, there were significant differences between survivors with and without multiple injuries, and that these differences occurred largely ...

In studying the late health effects of atomic-bomb (A-bomb) survivors, earlier findings were that white blood cell (WBC) count increased with radiation dose in cross-sectional studies. However, a persistent effect of radiation on WBC count and other risk factors has yet to be confirmed. The objectives of the present study were 1) to examine the ...

Using stored serum samples collected from 1970-72 and/or from 1977-79, serum ferritin, transferrin, and ceruloplasmin levels were immunologically determined for 233 stomach cancer and 84 lung cancer cases diagnosed from 1973-83 and for 385 matched control...

The concordance rate for the French-American-British (FAB) reclassification diagnoses of atomic bomb-related cases of leukemia in Nagasaki was determined by a group of RERF hematologists and one of the members of the FAB cooperative gruop. The peripheral ...

The Atomic Bomb Casualty Commission (ABCC) and its successor, the Radiation Effects Research Foundation, have conducted a long-term follow-up study of a cohort of 120,000 atomic bomb (A-bomb) survivors and non-exposed controls since 1950. The most recent findings regarding cancer mortality and incidence in this cohort can be briefly summarized as follows: ...

The occurrence of benign tumors and diverticula of the digestive system in the JNIH-ABCC Life Span Study autopsy series was investigated. There were 664 benign tumors and 40 diverticula. Polyps were the most frequent tumor, were found often in older peopl...

An earlier analysis examined the possibility of bias in the Life Span Study (LSS) cohort by studying Japanese A-bomb survivors with bomb-related acute injuries and those without such injuries. The authors reported significantly higher radiation risks, both for cancers and non-cancers, among those survivors with acute injuries compared ...

A mail questionnaire survey on the present status and health of children of Korean survivors of the 1945 atomic bombing of Japan was conducted in 2004. In total, 1,115 Korean A-bomb survivors' reports on demographic factors and the health of their children (n = 4,079) were analysed. In 2004, 293 of their children were reported to have ...

A follow-up study of A-bomb survivors registered in Nagasaki was conducted from 1970 to 1984 by the Scientific Data Center of A-Bomb Disaster at Nagasaki University, which has collected medical and administrative data on A-bomb survivors with the help of Nagasaki City Hall and other organizations. The purpose of this study was to investigate the following ...

An all important datum in risk assessment is the radiation dose to individual survivors of the bombings in Hiroshima and Nagasaki. The first set of dose estimates for survivors was based on a dosimetry system developed in 1957 by the Oak Ridge National Laboratory (ORNL). These Tentative 1957 Doses (T57D) were later replaced by a more extensive and refined ...

Significant decreases in the fraction of lymphocytes that are CD4(+) and increases in serum levels of some classes of immunoglobulin have been reported to occur in atomic bomb (A-bomb) survivors and in victims of the Chernobyl nuclear plant accident. To investigate the long-term effects of nuclear radiation on cellular immunity in more detail, we used ...

An analysis of the dose response within the low-dose range (as here defined, doses of less than 50 cGy (50 rad) was conducted among A-bomb survivors in the ABCC-RERF cohort in an attempt to detect the phenomenon of radiation hormesis, if it is present. These studies include as endpoints cancer mortality, cancer incidence, the frequency of cells with ...

Many Koreans, in addition to Japanese, were killed or injured by the atomic bombs detonated over Hiroshima and Nagasaki, Japan, in 1945. Our study examined noncancer diseases of Korean A-bomb survivors in residence at Hapcheon, Republic of Korea and evaluated whether they had significantly higher prevalence of noncancer diseases than non-exposed people. We ...

Many Koreans, in addition to Japanese, were killed or injured by the atomic bombs detonated over Hiroshima and Nagasaki, Japan, in 1945. Our study examined non-cancer diseases of Korean A-bomb survivors in residence at Hapcheon, Republic of Korea and evaluated whether they had significantly higher prevalence of non-cancer diseases than non-exposed people. ...

A pathological investigation was undertaken in Hiroshima on cases seen between 1945 and 1971 to determine the relationship between salivary gland tumors and exposure to atomic (A) bomb radiation. Of the 208 cases of histologically confirmed salivary gland tumors, 62 were A-bomb survivors and 146 were nonexposed. ...

Prenatal exposure to ionizing radiation induces some effects that are seen at birth and others that cannot be detected until later in life. Data from A-bomb survivors in Hiroshima and Nagasaki show a diminished number of births after exposure under 4 wk of gestational age. Although a wide array of congenital malformations has been found in animal ...

Among about 100,000 A-bomb survivors registered at Nagasaki University School of Medicine, 290 male subjects exposed to 50-149 cGy showed significantly lower mortality from non-cancerous diseases than age-matched unexposed males. This was deduced from the fitting of a U-shaped dose-response relationship. Reasons for this effect in males, but not in ...

We consider the possible bias in cancer risk estimation from A-bomb survivors due to selection of the cohort by survival. The paper considers both relevant information from the data and basic theoretical issues involved. The most direct information from the data comes from making various restrictions on the dose-distance range, partly to reduce ...

Information on Japanese A-bomb survivors exposed to gamma radiation has been used to estimate cancer risks for the whole range of photon (x-rays) and electron energies which are commonly encountered by radiation workers in the work place or by patients and workers in diagnostic radiology. However, there is some uncertainty regarding the radiation ...

Of the 66,276 Nagasaki atomic bomb survivors registered at the Scientific Data Center for the Atomic Bomb Disaster at the Nagasaki University School of Medicine, 140 were identified as having skin cancer from the records of 31 hospitals in Nagasaki City. From the cases of these survivors, a statistical analysis was made of the incidence of skin cancers by ...

Bone marrow from the vertebrae and sternum of 35 cases of cardiovascu1ar disease, 33 of pulmonary tuberculosis, 18 of gastric carcinoma, 18 of carcinoma of other organs, and 7 of bronchopneumonia among A-bomb-exposed persons was compared with the marrow of non-exposed patients. Ce1lular elements were markedly increased, especially premature cells of the granulocytic ...

In an analysis of a follow-up study of a fixed population of 73,330 atomic bomb survivors in Hiroshima and Nagasaki, the slope of an estimated dose response between ionizing radiation and leukemia mortality was found to be steeper (P less than 0.002), by a factor of 2.4, among those who reported epilation within 60 days of the bombings, compared to those who did not experience ...

When evaluating the risks of oncogenesis and cancer mortality following exposure to the radiations of the atomic bombs (A-bombs), the medical X-ray doses received by the A-bomb survivors must also be estimated and considered. Using a human phantom, dosimetry was performed to estimate the X-ray doses received by A-bomb survivors during ...

Results of a National Academies workshop and feasibility study led US Governmental agencies to request the Board on Radiation Effects Research of the National Research Council to commence a risk assessment study in 1998 as the seventh report in the series Biological Effects of Ionizing Radiations (BEIR VII). Originally targeted for completion in the autumn of 2001, the study Potential Health ...

On the basis of previous studies showing an association between hepatitis B surface antigen (HBsAg) positivity and radiation exposure in atomic bomb (A-bomb) survivors, we investigated further the active state of hepatitis B virus (HBV) infection by incorporating tests of hepatitis B e antigen (HBeAg) and hepatitis B e antibody (anti-HBe) and HBsAg ...

Lung cancer is a leading cause of cancer death worldwide. Prevention could be improved by identifying susceptible individuals as well as improving understanding of interactions between genes and etiological environmental agents, including radiation exposure. The epidermal growth factor receptor (EGFR)-signaling pathway, regulating cellular radiation sensitivity, is an oncogenic cascade involved in ...

Abstract Genomic instability has been suggested as a mechanism by which exposure to ionizing radiation can lead to cancer in exposed humans. However, the data from human cells needed to support or refute this idea are limited. In our previous study on clonal lymphocyte populations carrying stable-type aberrations derived from A-bomb survivors, we found no ...

Studies of cancer among the Japanese survivors of the A-bombs dropped on Nagasaki and Hiroshima are the major source of information on radiation carcinogenesis in humans. They have already made important contributions to the estimation of the risk of radiation-induced cancer and to our understanding of key factors influencing risk, especially tissue sensitivity, age at ...

Epidemiological data on the health effects of A-bomb radiation in Hiroshima and Nagasaki provide the framework for setting limits for radiation risk and radiological protection. However, uncertainty remains in the equivalent dose, because it is generally believed that direct derivation of the relative biological effectiveness (RBE) of neutrons from the epidemiological data on the ...

An individual absorbed dose for atomic bomb (A-bomb) survivors and radiologic technologists has been estimated using a new personal dosimetry. This dosimetry is based on the electron spin resonance (ESR) spectroscopy of the CO33- radicals, which are produced in their teeth by radiation. Measurements were carried out to study the characteristics of the ...

Physical and psychosomatic examinations were performed on 356 A-bomb survivors during the 4-yr period complained of fatigue and vertigo, 118 of whom had had no corresponding explanation. There was no significant change in the blood and bone marrow other than a tendency to a higher incidence of either anemia, leukopenia, thrombocytopenia, or their ...

A series of tests of immunologic function were used in assessing the immune status of individuals who survived the atomic bombs in Japan in 1945. A-bomb survivors (n=189) residing in the US were recruited to participate in the study. Survivors exposed to varying low doses of radiation (S/sub +/ group) had healthier immune responses ...

The relationship of ionizing radiation to the age-related ophthalmological findings of the 1978-1980 ophthalmological examination of A-bomb survivors of Hiroshima and Nagasaki has been reanalyzed using DS86 eye organ dose estimates. The main purpose of this reevaluation was to determine whether age and radiation exposure, as measured using the recently revised dosimetry ...

A binational panel of Japanese and American pulmonary pathologists reviewed tissue slides of lung cancer cases diagnosed among Japanese A-bomb survivors and American uranium miners and classified the cases according to histological subtype. Blind reviews were completed on slides from 92 uranium miners and 108 A-bomb ...

A binational panel of Japanese and American pulmonary pathologists reviewed tissue slides of lung cancer cases diagnosed among Japanese A-bomb survivors and American uranium miners and classified the cases according to histological subtype. Blind reviews were completed on slides from 92 uranium miners and 108 A-bomb ...

About 7,000 atomic bomb (A-bomb) survivors from Hiroshima and Nagasaki who participate in the Radiation Effects Research Foundation (RERF) Adult Health Study (AHS) were examined to define the relationship between skin neoplasms and exposure to ionizing radiation. Careful clinical inspection of the skin was undertaken to detect not only skin cancer but ...

... 100 bands to attach the MB-2A bomb to the B-37K-I bomb rack. 2. DESCRIPTION OF TEST ITEM. The MB-2A bomb band is a metal strip with ...

Results are reported from ophthalmologic observations carried out on residents of Nagasaki and Hiroshima and exposed to radiation from an atomic explosion. Very significant statistical test results indicate that lenticular opacities observed have definite relationship to ionizing radiation exposure distance from the hypocenter (exposure distance in this instance is used as a relative index of ...

This film details the Allied efforts to halt German heavy water production at the Norsk Hydro factory in Telemark, Norway during World War II. With reenacted scenes, commuter generated animations, and narration, the film describes the various Allied and underground missions against the factory, beginning with the planned attack by commandos that ended with a plane crash and the execution of all ...

During the years 1954 to 1956, 1,940 women who had been exposed to the atomic bomb in Hiroshima were examined with with special reference to the hematological picture. The hematological findings were generally normal. The abnormal blood findings were considered to be due more to poor living conditions than to radiation effects alone. Therefore, in treating A-bomb ...

The world population has been exposed to low levels of fission products from nuclear testing. Has this had any health effects. Six different epidemiological associations are demonstrated between leukemia and nuclear fallout in the general population. The strongest association is with acute and myeloid types of leukemia among children. They peaked at approximately 5.5 yr (among 5-9 yr olds) after ...

Cancer risk coefficients for ionizing radiation are currently based on the assumption that, after the bombing of Hiroshima and Nagasaki, there were no late effects of early selection (survival of the fittest) or acute marrow damage. These negative findings were the result of applying a linear model of relative risk to the deaths of 5-y survivors. By applying a linear-quadratic ...

... Title : Protection by Concrete Against A-Bomb Radiation Sickness in Hiroshima City. Corporate Author : ATOMIC ENERGY COMMISSION ...

This study demonstrates that cells adapted to ionizing radiation developed reduced initial DNA damage when compared to non-adapted cells. The results were obtained by subjecting in vitro irradiated whole blood from 10 healthy volunteers (including 2 A-bomb survivors carrying 1.5-2 Gy in vivo exposure) in an unstimulated condition (G0) using the comet ...

Part of a life-span study, designed to evaluate the late mortality effects of radiation and other trauma received by the survivors of the Hiroshima and Nagasaki A-bombs, is reported. About l00,000 persons, including those exposed near to ground zero, persons exposed at such distances from ground zero as to guarantee that little radiation was ...

Radiation-induced chromosome aberrations were found to persist in cultured peripheral blood lymphocytes derived from Hiroshima and Nagasaki A-bomb survivors long after their radiation exposure. Earlier observations that the frequency of cells with chromosome aberrations increased in proportion with increasing dose in both cities were reconfirmed. However, ...

The prevalence of roentgenologically-detected foregin bodies among atomic bomb survivors was studied as an indicator of the A-bomb blast effects. Acupuncture was studied as an indicator of possible A-bomb-related abnormalities for which it was administered. All available roentgenograms of Adult Health Study (AHS) subjects which demonstrated foreign bodies ...

PURPOSE: The immune systems of the atomic-bomb (A-bomb) survivors were damaged proportionately to irradiation levels at the time of the bombing over 60 years ago. Although the survivor's immune system repaired and regenerated as the hematopoietic system has recovered, significant residual injury persists, as manifested by abnormalities ...

The atomic bombs in Hiroshima and Nagasaki led to two different types of radiation exposure; one was direct and brief and the other was indirect and persistent. The latter (so-called exposure to residual radiation) resulted from the presence of neutron activation products in the soil, or from fission products present in the fallout. Compared with the doses from direct exposures, estimations of ...

To clarify the relationship between somatic cell mutations and radiation exposure, the frequency of hemizygous mutant erythrocytes at the glycophorin A (GPA) locus was measured by flow cytometry for 1,226 heterozygous atomic bomb (A-bomb) survivors in Hiroshima and Nagasaki. For statistical analysis, both GPA mutant frequency and radiation dose were ...

To clarify the relationship between somatic cell mutations and radiation exposure, the frequency of hemizygous mutant erythrocytes at the glycophorin A (GPA) locus was measured by flow cytometry for 1,226 heterozygous atomic bomb (A-bomb) survivors in HIroshima and Nagasaki. For statistical analysis, both GPA mutant frequency and radiation dose were ...

After ingestion or inhalation of radionuclides, internal organs of the human body will be exposed to ionising radiation. Current risk estimates of radiation-associated cancer from internal emitters are largely based on extrapolation of risk from high-dose externally exposed groups. Concerns have been expressed that extrapolated risk estimates from internal emitters are greatly underestimated, by ...

The lack of treatment for "worried well" patients with high-grade prostatic intraepithelial neoplasia combined with issues of recurrence and hormone resistance in prostate cancer survivors remains a major public health obstacle. The long latency of prostate cancer development provides an ample opportunity to intervene with mechanistically based ...

The lack of treatment for worried-well patients with high-grade prostatic intraepithelial neoplasia combined with issues of recurrence and hormone resistance in prostate cancer survivors remains a major public health obstacle. The long latency of prostate cancer development provides an ample opportunity to intervene with mechanistically-based ...

Circumstances have made it necessary to reassess the risks to Space Station Freedom crewmembers that arise from exposure to the space radiation environment. An option is being considered to place it in an orbit similar to that of the Russian Mir space station. This means it would be in a 51.6 deg inclination orbit instead of the previously planned 28.5 deg inclination orbit. A broad range of ...

Mortality and cancer incidence were studied in the National Registry for Radiation Workers in, relative to earlier analyses, an enlarged cohort of 174 541 persons, with longer follow-up (to 2001) and, for the first time, cancer registration data. SMRs for all causes and all malignant neoplasms were 81 and 84 respectively, demonstrating a 'healthy worker effect'. Within the cohort, mortality and ...

Mortality and cancer incidence were studied in the National Registry for Radiation Workers in, relative to earlier analyses, an enlarged cohort of 174?541 persons, with longer follow-up (to 2001) and, for the first time, cancer registration data. SMRs for all causes and all malignant neoplasms were 81 and 84 respectively, demonstrating a �healthy worker effect'. Within the cohort, mortality and ...

Purpose:?Quantitative analysis of cancer risk of ionising radiation as a function of dose-rate. Materials and methods:?Non-tumour dose, D(nt), defined as the highest dose of radiation at which no statistically significant tumour increase was observed above the control level, was analysed as a function of dose-rate of radiation. Results:?An inverse correlation was found between D(nt) and dose-rate ...

The assessment of health effects from low-level exposure to radiation is a matter of considerable controversy. Many of the problems in analyzing and interpreting data on populations exposed to low levels of radiation are well illustrated by a current study of the effects on mortality of occupational exposure to radiation at the Hanford plant. The conclusion drawn is that the amount that can be ...

The first measurements of (63)Ni produced by A-bomb fast neutrons (above approximately 1 MeV) in copper samples from Hiroshima encompassed distances from approximately 380 to 5062 m from the hypocenter (the point on the ground directly under the bomb). They included the region of interest to survivor studies (approximately 900 to 1500 m) and provided the first direct ...

This study was designed to determine whether focal-head irradiated rhesus monkeys differ from normal monkeys in a manner analogous to that previously found in whole-body irradiated monkeys with respect to response latencies under both familiar and novel stimulus conditions. Five control and four focal-head irradiated rhesus monkeys with nearly identical training ...

The present study, the ninth in a series that began in 1961, extends the time of surveillance 3 more years and covers the period 1950-1985. It is based on the recently revised doses, termed the DS86. The impact of the change from the T65D to the DS86 on the dose-response relationships for cancer mortality was described in the first of this series of reports. Here, the focus is on cancer mortality ...

Recent evidence argues against a high threshold dose for vision-impairing radiation-induced cataractogenesis. We conducted logistic regression analysis to estimate the dose response and used a likelihood profile procedure to determine the best-fitting threshold model among 3761 A-bomb survivors who underwent medical examinations during 2000-2002 for whom ...

Gamma-rays from thermal neutron-induced radionuclide of 152Eu in rocks near the ground center of the atomic bomb (A-bomb) explosion (hypocenter) in Nagasaki were measured with a pure germanium semiconductor detector. Depth profiles of 152Eu activity were obtained for 22 core samples taken from stone embankments on both sides of two rivers (the River Shimono-kawa and the River ...

We examined the relationships between the incidence of noncancer diseases and atomic bomb radiation dose using the longitudinal data for about 10,000 Adult Health Study (AHS) participants during 1958-1998. The current report updates the analysis we presented in 1993 with 12 additional years of follow-up. In addition to the statistically significant positive linear dose-response relationships ...

Risk estimates for radiation-induced cancer are primarily based on the follow-up of the Japanese A-bomb survivors. Their exposures were due to gamma rays and neutrons, and, currently--with the assumed low RBE = 10 of neutrons and reference to the colon dose--the late radiation effects are almost fully attributed to the gamma rays. Solid cancer risk ...

Estimates of radiation-induced malignancies come principally from the atomic (A)-bomb survivors and show an excess incidence of carcinomas that is linearly related to dose from about 5 cGy to 2.5 Gy. Above and below this dose range there is considerable uncertainty about the shape of the dose-response relationship. Both the International Commission of ...

The effective dose of combined spectrum energy neutrons and high energy spectrum gamma-rays in A-bomb survivors in Hiroshima and Nagasaki has long been a matter of discussion. The reason is largely due to the paucity of biological data for high energy photons, particularly for those with an energy of tens of MeV. To circumvent this problem, a mathematical formalism was ...

Several parameters of cellular immune function were assessed among persons who survived the 1945 atomic bombs in Hiroshima and Nagasaki but who now reside in the United States. The subjects in this study were exposed to various low doses (T65D) of radiation at the time of the bomb. More than half received an estimated 0 Gy (S0 group). Of those exposed to more radiation (S+ group), nearly 90% ...

Microscopic and photographic studies were conducted in 1972 to 1973 at the Atomic Bomb Casualty Commission (ABCC) in Hiroshima on the morphology of superficial blood vessels of A-bomb survivors to determine whether the somatic effects of radiation still existed 30 yr after the A-bomb. Control curves representing the relationship between age and score values assigned to ...

Analyses of the epidemiological data on the Japanese A-bomb survivors, who were exposed to ?-rays and neutrons, provide most current information on the dose-response of radiation-induced cancer. Since the dose span of main interest is usually between 0 and 1 Gy, for radiation protection purposes, the analysis of the A-bomb survivors is ...

Most information on the dose-response of radiation-induced cancer is derived from data on the A-bomb survivors who were exposed to gamma-rays and neutrons. Since, for radiation protection purposes, the dose span of main interest is between 0 and 1 Gy, the analysis of the A-bomb survivors is usually focused on this range. However, estimates of cancer risk ...

ABSTRACT: Background and Purpose: Most information on the dose-response of radiation-induced cancer is derived from data on the A-bomb survivors. Since, for radiation protection purposes, the dose span of main interest is between zero and one Gy, the analysis of the A-bomb survivors is usually focused on this range. However, estimates of cancer risk for ...

Background and PurposeMost information on the dose-response of radiation-induced cancer is derived from data on the A-bomb survivors. Since, for radiation protection purposes, the dose span of main interest is between zero and one Gy, the analysis of the A-bomb survivors is usually focused on this range. However, estimates of cancer risk for doses larger ...

Some relatively new issues that augment the usual practice of ignoring model uncertainty, when making inference about parameters of a specific model, are brought to the attention of the radiation protection community here. Nine recently published leukaemia risk models, developed with the Japanese A-bomb epidemiological mortality data, have been included in a model-averaging ...

There is increasing concern regarding radiation-related second-cancer risks in long-term radiotherapy survivors, and a corresponding need to be able to predict cancer risks at high radiation doses. While cancer risks at moderately low radiation doses are reasonably understood from A-bomb survivor studies, there is much more uncertainty ...

It has been reported recently that the A-bomb gamma ray spectra received by the colon of the average Japanese survivor of Hiroshima and Nagasaki may be experimentally simulated using a hospital-based Philips SL15 linear accelerator. The simulated A-bomb gamma radiation may be used in radiobiology experiments to determine, amongst other things, the ...

The techniques used to calculate the house shielding as part of the dosimetry reassessment for the survivors of the Hiroshima and Nagasaki A-bombs are validated by modeling the Operation BREN Japanese house-shielding experiments and comparing calculated radiation transmission factors to the measured values. Single and two-story houses were modeled, as well ...

The hypothesis that exposure to ionizing radiation accelerates the aging process has been actively investigated at ABCC-RERF since 1958, when longitudinal cohort studies of the Adult Health Study (AHS) and the Life Span Study (LSS) were initiated. In their 1975 overall review of aging studies related to the atomic bomb (A-bomb) survivors, Finch and Beebe ...