Prospects and status of the dosimetry system for atomic bomb survivor cohort study conducted at Research Institute for Radiation Biology and Medicine of Hiroshima University

Abstract

The Research Institute for Radiation Biology and Medicine (RIRBM) of Hiroshima University has been conducting a cohort study of atomic bomb survivors (ABS). Cohort members include those who were issued an Atomic Bomb Health Handbook from the Hiroshima local government. A series of dosimetry systems for the ABS were developed at RIRBM to evaluate the health effects associated with radiation exposure. The framework used to estimate individual doses in our dosimetry systems for ABS is mainly based on the Dosimetry System 86, and its revisions developed by the Radiation Effect Research Foundation. This article describes the design and computational principles for the dosimetry systems in RIRBM and the history of the revisions, from the first version of the system, ABS93D, to the most recent version, ABS16D. We then provide a perspective for further improvement and application of the dosimetry system.

Contribution of radioactive particles to the post-explosion exposure of atomic bomb survivors implied from their stable chromosome aberration rates

“…In other words, the contribution of neutron dose could not be significant at distant places (> 1.2 km), even though a higher RBE value was employed for neutrons. Note that these ABS data presented in Figure 2 have been shared with many researchers, and part of them were published in some peer-reviewed articles (11)(12)(13).…”

Solid cancer mortality risk among a cohort of Hiroshima early entrants after the atomic bombing, 1970–2010: implications regarding health effects of residual radiation

“…ABSs are officially defined as individuals who received an A-bomb Survivors’ Health Handbook by the Japanese government, and they are classified according to their various conditions at the time of the bombing: directly exposed survivors, entrants who entered the region within 2 km from the hypocenter during the first 2 weeks after the bombing, persons engaged in treatment and aid of those suffering bodily injury, and in utero exposed survivors. This study deal with a cohort of 45 749 individuals (25 660 men and 20 149 women) who were living in Hiroshima Prefecture on 1 January 1970 and were registered the Database of Atomic Bomb Survivors [ 14 ]. The basic information of gender, date of birth, age at the time of exposure and date of entry into the city listed in the ABS database was used in this study.…”