Study of mortality risk of Hiroshima atomic bomb victims during 5 years just after the bombing

2016 Fiscal Year Final Research Report

• Project/Area Number: 26460747
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Epidemiology and preventive medicine
• Research Institution: Hiroshima University
• Principal Investigator: Otani Keiko 広島大学, 原爆放射線医科学研究所, 研究員 (20243587)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 残留放射線 / 広島原爆 / 入市者

Outline of Final Research Achievements

A-bomb radiation exposure is generally divided into two types: direct exposure to gamma-ray as well as prompt and delayed neutrons from the initial radiation explosion, and indirect exposure from residual radiation comprising neutron activated radiation in soil and other materials as well as fallout from the nuclear explosion. The results of this study showed that increase of mortality risk was detected immediately after the bombing in distal survivors or entrants who were exposed by negligible low radiation dose. We must reconsider that such low estimates of residual-radiation dose have health effects in case that breathing dust contaminated with radioactive materials.

Free Research Field

医学統計学