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Radiation absorbed dose to bladder walls from positron emitters in the bladder content
Author(s) -
Powell Gregory F.,
Chen ChinTu
Publication year - 1987
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595988
Subject(s) - thermoluminescent dosimeter , dosimeter , absorbed dose , dosimetry , brachytherapy , thermoluminescence , radiation , nuclear medicine , materials science , physics , positron , gamma ray , thermoluminescent dosimetry , optics , radiation therapy , nuclear physics , medicine , radiology , electron , luminescence
A method to calculate absorbed doses at depths in the walls of a static spherical bladder from a positron emitter in the bladder content has been developed. The beta ray dose component is calculated for a spherical model by employing the solutions to the integration of Loevinger and Bochkarev point source functions over line segments and a line segment source array technique. The gamma ray dose is determined using the specific gamma ray constant. As an example, absorbed radiation doses to the bladder walls from F‐18 in the bladder content are presented for static spherical bladder models having radii of 2.0 and 3.5 cm, respectively. Experiments with ultra‐thin thermoluminescent dosimeters (TLD's) were performed to verify the results of the calculations. Good agreement between TLD measurements and calculations was obtained.