The Investigation of Tissue Composition Effects on Dose Distributions Using Monte Carlo Method in Permanent Prostate Brachytherapy

Objective: Radiation dose calculations in the prostate brachytherapy practices have very high importance terms of success treatment. The purpose present study is to determine whether there a significant difference between radiation performed water medium and cancer-diagnosed patients by using Monte Carlo method.
 Methods: were on 20 BrachyDose code. Phantom geometry derived from real computed tomography (CT) data was created use calculations. Water material assigned all voxels within volume for comparison with CT phantom. 125I (Amersham, OncoSeed, 6711), 103Pd (Theragenics Co., TheraSeed, 200) 131Cs (IsoRay Medical) commercial seed models used 
 Results: It observed that are differences tissue. D90 values tissue calculated as 7.2-10.5%, 9.1-13.4% 5.4-8.3% 125I, sources, respectively. Conclusions: concluded compositions different organs tissues human body should be considered more accurate