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Title: Korean Pediatric and Adult Head Computational Phantoms and Application to Photon Specific Absorbed Fractions Calculations.
Authors: Villoing D,  McMillan D,  Kim KP,  Park I,  Lee AK,  Choi HD,  Lee C
Journal: Radiat Prot Dosimetry
Date: 2017 Nov 1
Branches: REB
PubMed ID: 28338814
PMC ID: PMC5927335
Abstract: In recent decades, applications of single photon emission computed tomography and positron emission tomography in clinical neuroimaging have markedly increased. In this study, we developed a series of Korean computational head phantoms with detailed cranial substructures for 6-, 9-, 12- and 15-year-old children and adult by non-uniformly adjusting a template head phantom to match the Korean standard head dimensions. The Korean head phantoms were coupled with a Monte Carlo transport code to calculate age-dependent specific absorbed fraction (SAF) for the combination of 10 source and target regions and mono-energetic photons ranging from 0.01 to 4 MeV. Compared to the adult phantom, the 6-y phantom showed up to 1.4-fold greater self-absorption SAF (cerebellum) and up to 1.8-fold greater cross-irradiation SAF (cerebellum < eye balls). With addition of electron SAFs in the future, our photon SAF data will facilitate dose calculations for various cranial substructures in patients undergoing cranial neuroimaging procedures.