@Article{Bakhshabadi2016,
journal="Journal of Contemporary Brachytherapy",
issn="1689-832X",
volume="8",
number="1",
year="2016",
title="A comparison study on various low energy sources in interstitial prostate brachytherapy",
abstract=" Purpose:   Low energy sources are routinely used in prostate brachytherapy.  125 I is one of the most commonly used sources. Low energy  131 Cs source was introduced recently as a brachytherapy source. The aim of this study is to compare dose distributions of  125 I,  103 Pd, and  131 Cs sources in interstitial brachytherapy of prostate.   Material and methods:   ProstaSeed  125 I brachytherapy source was simulated using MCNPX Monte Carlo code. Additionally, two hypothetical sources of  103 Pd and  131 Cs were simulated with the same geometry as the ProstaSeed  125 I source, while having their specific emitted gamma spectra. These brachytherapy sources were simulated with distribution of forty-eight seeds in a phantom including prostate. The prostate was considered as a sphere with radius of 1.5 cm. Absolute and relative dose rates were obtained in various distances from the source along the transverse and longitudinal axes inside and outside the tumor. Furthermore, isodose curves were plotted around the sources.    Results : Analyzing the initial dose profiles for various sources indicated that with the same time duration and air kerma strength,  131 Cs delivers higher dose to tumor. However, relative dose rate inside the tumor is higher and outside the tumor is lower for the  103 Pd source.   Conclusions : The higher initial absolute dose in cGy/(h.U) of  131 Cs brachytherapy source is an advantage of this source over the others. The higher relative dose inside the tumor and lower relative dose outside the tumor for the  103 Pd source are advantages of this later brachytherapy source. Based on the total dose the  125 I source has advantage over the others due to its longer half-life.",
author="Bakhshabadi, Mahdi
and Ghorbani, Mahdi
and Khosroabadi, Mohsen
and Knaup, Courtney
and Meigooni, Ali S.",
pages="74--81",
doi="10.5114/jcb.2016.57708",
url="http://dx.doi.org/10.5114/jcb.2016.57708"
}