Determination of dosimetric characteristics of a new design 125I brachytherapy source with the Monte Carlo code MCNPX

被引：3
作者：
Babaheidari A.E. [1 ]
Shamsaee M. [1 ]
Ahmadi P. [2 ]
机构：
[1] Department of Nuclear Engineering and Physics, Amirkabir University of Technology Tehran Polytechnic
[2] Persian Gulf Freeway, Shahed University, Tehran
来源：
Radiochemistry | 2014年 / 56卷 / 3期
关键词：
brachytherapy; dosimetry; iodine-125; seed; MCNPX; Monte Carlo method;
D O I：
10.1134/S1066362214030126
中图分类号：
学科分类号：
摘要：
The dosimetric parameters of a new 125I brachytherapy seed model were determined using Monte Carlo (MC) simulations according to the updated protocol of the American Association of Physicists in Medicine (TG-43U1 report) and compared with those of other brachytherapy 125I seed models. The dose rate constant Λ, radial dose function g L(r), and anisotropy function F(r, θ), were calculated in liquid water, and the dose rate constant of 0.915 ± 2% cGy h-1 U-1 in liquid water was obtained. Acceptable agreement between the calculated dosimetric parameters of this new source and other commercial source models (Amersham 6702 and Imagyn model IS-12 501) indicates that this seed has acceptable dose distributions for clinical use. However, the anisotropy function of this model is considerably better than that of Imagyn model IS-12 501 125I source, especially on the points along and close to the longitudinal axis of the source. This model provides more isotropic angular dose distribution in tissue than does Imagyn model IS-12501 125I source. © 2014 Pleiades Publishing, Inc.
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页码：296 / 301
页数：5
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