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Journal Article Korean Pediatric and Adult Head Computational Phantoms and Application to Photon Specific Absorbed Fractions Calculations
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Authors
Daphnee Villoing, Dayton McMillan, Kwang Pyo Kim, Il Park, Ae-Kyoung Lee, Hyung-do Choi, Choonsik Lee
Issue Date
2017-11
Citation
Radiation Protection Dosimetry, v.176, no.3, pp.294-301
ISSN
0144-8420
Publisher
Oxford Univ. Press
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1093/rpd/ncx009
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.
KSP Keywords
Absorbed fraction, Age-dependent, Computed tomography(C.T), Coupled with, Monte carlo, Positron emission tomography, Self-absorption, Single photon emission computed tomography, Transport code