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Dose coefficients of mesh-type ICRP reference computational phantoms for external exposures of neutrons, protons, and helium ions

Authors
 Yeon Soo Yeom  ;  Chansoo Choi  ;  Haegin Han  ;  Bangho Shin  ;  Thang Tat Nguyen  ;  Min Cheol Han  ;  Chan Hyeong Kim  ;  Choonsik Lee 
Citation
 NUCLEAR ENGINEERING AND TECHNOLOGY, Vol.52(7) : 1545-1556, 2020-07 
Journal Title
NUCLEAR ENGINEERING AND TECHNOLOGY
ISSN
 1738-5733 
Issue Date
2020-07
Keywords
ICRP reference phantom ; Mesh ; Dose coefficient ; Neutrons ; Protons ; Helium ions
Abstract
Recently, the International Commission on Radiological Protection (ICRP) has developed the Mesh-type Reference Computational Phantoms (MRCPs) for adult male and female to overcome the limitations of the current Voxel-type Reference Computational Phantoms (VRCPs) described in ICRP Publication 110 due to the limited voxel resolutions and the nature of voxel geometry. In our previous study, the MRCPs were used to calculate the dose coefficients (DCs) for idealized external exposures of photons and electrons. The present study is an extension of the previous study to include three additional particles (i.e., neutrons, protons, and helium ions) into the DC library by conducting Monte Carlo radiation transport simulations with the Geant4 code. The calculated MRCP DCs were compared with the reference DCs of ICRP Publication 116 which are based on the VRCPs, to appreciate the impact of the new reference phantoms on the DC values. We found that the MRCP DCs of organ/tissue doses and effective doses were generally similar to the ICRP-116 DCs for neutrons, whereas there were significant DC differences up to several orders of magnitude for protons and helium ions due mainly to the improved representation of the detailed anatomical structures in the MRCPs over the VRCPs.
Full Text
https://www.sciencedirect.com/science/article/pii/S1738573319309726
DOI
10.1016/j.net.2019.12.020
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Han, Min Cheol(한민철)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/190062
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