Host: The Japan Radiation Research Society
Co-host: City of Kitakyushu, University of Occupational and Environmental Health, Japan
Low dose radiation effects on human being are not clearly results even now. Because it is different situation from animal experiment, so we can't observe low dose radiation effects on human beings except radiation accident. The Radiation Effects Research Foundation (RERF) has been surveyed to atomic bomb survivors in Hiroshima and Nagasaki over long term. They have the cohort of A-bomb survivors so called Life Span Study (LSS). They have been reported many results about dose dependency of cancer mortality from 1950 to 1997. On the other hand, according to the ICRP recommendation, low dose radiation effects extrapolate to linear model for dose response curve. It means existence of risk at low dose radiation. Stewart et al. have been clamed it and they reported U-shape curve for non-cancerous mortality by analysis of RERF data. Also, we analyzed atomic bomb survivors in Nagasaki, and found mortality of low dose group in male less than general one. I would like to discuss about limitation of epidemiology on the low dose radiation effects among human being.
