放射線リスク推定の最近の動向

BEIR III報告書を中心に

抄録

BEIR III committee has issued an extensive review on the effects of low level radiations on human population. The review deals with the levels of radiation exposure for US people, scientific principles in analysis of radiation effects and describes how the risks of genetic and somatic effects are estimated. Major advances from the previous report (BEIR I) are: Introduction of three different dose-response models (linear, linear-quadratic and quadratic) for the estimation of risk of cancer induction, attempt to estimate cancer risk based on the incidence in addition to the mortality, and consideration of influence of the sex and the age at exposure on cancer induction. Follow-up studies at RERF in Hiroshima and Nagasaki are contributing greatly in providing basic data. Review of selected studies on record such as MANCUSO et al., STERNGLASS and others, and analysis of the effects other than cancer are also useful.