期刊
APPLIED RADIATION AND ISOTOPES
卷 141, 期 -, 页码 193-198出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2018.03.005
关键词
Gel dosimetry; Water-equivalence; Computed tomography
类别
资金
- CONICET (Argentina) [ESPORA I - PIP 112-20130100658CO]
- SeCyT-UNC (Argentina) project DOSCOM I
- DI-UFRO (Chile) [DI-16-6008, DI-17-1003]
International dosimetry protocols are based on determinations of absorbed dose to water. Ideally, the phantom material should be water equivalent; that is, it should have the same absorption and scatter properties as water. This study presents theoretical, experimental and Monte Carlo modeling of water-equivalence of Fricke and polymer (NIPAM, PAGAT and itaconic acid ITABIS) gel dosimeters. Mass and electronic densities along with effective atomic number were calculated by means of theoretical approaches. Samples were scanned by standard computed tomography. Photon mass attenuation coefficients and electron stopping powers were examined. Theoretical, Monte Carlo and experimental results confirmed good water-equivalence for all gel dosimeters. Overall variations with respect to water in the low energy radiology range (up to 130 kVp) were found to be less than 3% in average.
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