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Dose coefficients for the ICRP pediatric mesh-type reference computational phantoms under idealized external photon exposure geometries

김찬형|염연수|최찬수|Bolch Wesley E.|신방호
한국원자력학회 (Korean Nuclear Society)|2025.09|Nuclear Engineering and Technology|제57권 제9호|DOI 10.1016/j.net.2025.103621

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Monte Carlo simulationDose coefficientsICRP reference phantomsPediatric phantomsMesh-typeExternal photon exposures
주제분류원자력공학

초록

The International Commission on Radiological Protection (ICRP) recently released the pediatric mesh-type reference computational phantoms (MRCPs) through ICRP Publication 156 to overcome the limitations of the pediatric voxel-type reference computational phantoms (VRCPs) of ICRP Publication 143. In the present study, these pediatric MRCPs were implemented into the Geant4 Monte Carlo code to produce a comprehensive dataset of dose coefficients for idealized external photon exposure geometries. This dataset includes 29 individual organ/ tissue dose coefficients and effective dose coefficients, covering six irradiation geometries (i.e., AP, PA, LLAT, RLAT, ROT, and ISO) and 55 monoenergetic photon energies ranging from 10 keV to 10 GeV. The dataset comparison with the adult MRCPs of ICRP Publication 145 revealed substantial differences in effective dose coefficients throughout most energy ranges, primarily due to the age-related variations in organ/tissue depths, the differences reaching up to a factor ~9. In addition, the comparisons with the pediatric VRCPs identified notable differences in effective dose coefficients, reaching up to a factor ~4, for photon energies below 50 keV, due to the differences in phantom geometries and updates in simulation setups. For photon energies above 50 keV, deviations in effective dose coefficients between the pediatric MRCPs and VRCPs remained within 10 %.

Abstract

The International Commission on Radiological Protection (ICRP) recently released the pediatric mesh-type reference computational phantoms (MRCPs) through ICRP Publication 156 to overcome the limitations of the pediatric voxel-type reference computational phantoms (VRCPs) of ICRP Publication 143. In the present study, these pediatric MRCPs were implemented into the Geant4 Monte Carlo code to produce a comprehensive dataset of dose coefficients for idealized external photon exposure geometries. This dataset includes 29 individual organ/ tissue dose coefficients and effective dose coefficients, covering six irradiation geometries (i.e., AP, PA, LLAT, RLAT, ROT, and ISO) and 55 monoenergetic photon energies ranging from 10 keV to 10 GeV. The dataset comparison with the adult MRCPs of ICRP Publication 145 revealed substantial differences in effective dose coefficients throughout most energy ranges, primarily due to the age-related variations in organ/tissue depths, the differences reaching up to a factor ~9. In addition, the comparisons with the pediatric VRCPs identified notable differences in effective dose coefficients, reaching up to a factor ~4, for photon energies below 50 keV, due to the differences in phantom geometries and updates in simulation setups. For photon energies above 50 keV, deviations in effective dose coefficients between the pediatric MRCPs and VRCPs remained within 10 %.

관련 논문AI추천

Dose coefficients for ICRP pediatric mesh-type reference computational phantoms under idealized external electron exposures김찬형, 문성호, 신방호, 염연수, 최찬수, Bolch Wesley E.한국원자력학회 · Nuclear Engineering and Technology2025 · 제57권 제12호Pediatric phantom library constructed from ICRP mesh-type reference computational phantoms (MRCPs)김수현, 김재효, 김찬형, 김현일, 문성호, 손가희, 신방호, 염연수, 정범선, 최지원, 최찬수, 하상석, 한혜진한국원자력학회 · Nuclear Engineering and Technology2024 · 제56권 제8호New thyroid models for ICRP pediatric mesh-type reference computational phantoms김수현, 김찬형, 김현일, 문성호, 손가희, 신방호, 염연수, 이세형, 정범선, 최찬수, 한혜진, Nguyen Thang Tat한국원자력학회 · Nuclear Engineering and Technology2022 · 제54권 제12호Implication of ICRP pediatric reference voxel phantoms on dose assessment of patients in radioiodine therapy고슬기, 김찬형, 민철희, 신방호, 염연수, 이수민, 최지원, 최찬수한국원자력학회 · Nuclear Engineering and Technology2024 · 제56권 제6호Advancing pediatric organ dose assessment in radioiodine therapy with ICRP pediatric mesh-type reference computational phantoms신방호, 염연수, 이수민, 최찬수한국원자력학회 · Nuclear Engineering and Technology2025 · 제57권 제7호Dose coefficients of mesh-type reference Korean phantoms (MRKPs) for idealized external exposure geometries of photons and electrons김수현, 김재효, 김찬형, 김현일, 문성호, 손가희, 신방호, 염연수, 이유민, 정종휘, 최찬수, 한혜진한국원자력학회 · Nuclear Engineering and Technology2025 · 제57권 제4호

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