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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
- 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