Investigation on circular asymmetry of geographical distribution of mortality risk in Hiroshima atomic bomb survivors

IPSHU English Research Report Series Issue 28 Page 57-65 published_at 2012-03
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Title ( eng )
Investigation on circular asymmetry of geographical distribution of mortality risk in Hiroshima atomic bomb survivors
Creator
Tonda Tetsuji
Hoshi Masaharu
Source Title
IPSHU English Research Report Series
Issue 28
Start Page 57
End Page 65
Abstract
While there are a considerable number of studies on the relationship between the risk of disease or death and direct exposure from the atomic bomb in Hiroshima, the risk for indirect exposure caused by residual radioactivity has not yet been fully evaluated. One of the reasons is that risk assessments have utilized estimated radiation doses, but that it is difficult to estimate indirect exposure. To evaluate risks for other causes, including indirect radiation exposure, as well as direct exposure, a statistical method is described here that evaluates risk with respect to individual location at the time of atomic bomb exposure instead of radiation dose. The proposed method is applied to a cohort study of Hiroshima atomic bomb survivors. The resultant contour map suggests that the region north-west to the hypocenter has a higher risk compared to other areas. This in turn suggests that there exists an impact on risk that cannot be explained by direct exposure.
NDC
Peace Science [ 319 ]
Language
eng
Resource Type departmental bulletin paper
Publisher
広島大学平和科学研究センター
Date of Issued 2012-03
Rights
Copyright (c) 2012 Institute for Peace Science, Hiroshima University
Publish Type Version of Record
Access Rights open access
Source Identifier
[NCID] AA10456537