Experimental and Monte Carlo evaluation of Eclipse treatment planning system for effects on dose distribution of the hip prostheses
Experimental and Monte Carlo evaluation of Eclipse treatment planning system for effects on dose distribution of the hip prostheses
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DOI：
10.1016/j.meddos.2013.03.005
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发表时间：
2013-09-01
影响因子：
1.2
通讯作者：
Tanir, Gunes
中科院分区：
文献类型：
--
作者：
Catli, Serap;Tanir, Gunes
本研究旨在研究钛、钛合金和不锈钢髋关节假体对基于蒙特卡罗模拟方法的剂量分布的影响，以及Eclipse治疗计划系统（TPS）在6和18 MV光子能量下的准确性。在本研究中，笔形束卷积（PBC）的Eclipse TPS中实现的方法进行了比较，蒙特卡罗方法和电离室测量。目前的研究结果表明，如果在假体中使用高Z材料，由于散射，可能会发生大的剂量变化。本研究中观察到的剂量变化取决于材料类型、密度和原子序数以及光子能量;随着光子能量的增加，后向散射减少。髋关节假体的剂量扰动效应是显著的，并且不能用用于髋关节假体的PBC方法准确地预测。结果表明，为准确的剂量计算，基于蒙特卡罗的TPS应用于髋关节假体患者。(C)2013年美国医学剂量学家协会。
The present study aimed to investigate the effects of titanium, titanium alloy, and stainless steel hip prostheses on dose distribution based on the Monte Carlo simulation method, as well as the accuracy of the Eclipse treatment planning system (TPS) at 6 and 18 MV photon energies. In the present study the pencil beam convolution (PBC) method implemented in the Eclipse TPS was compared to the Monte Carlo method and ionization chamber measurements. The present findings show that if high-Z material is used in prosthesis, large dose changes can occur due to scattering. The variance in dose observed in the present study was dependent on material type, density, and atomic number, as well as photon energy; as photon energy increased back scattering decreased. The dose perturbation effect of hip prostheses was significant and could not be predicted accurately by the PBC method for hip prostheses. The findings show that for accurate dose calculation the Monte Carlo-based TPS should be used in patients with hip prostheses. (C) 2013 American Association of Medical Dosimetrists.