ABSTRACT

The purpose of this study is to validate GATE 8.1 Radiotherapy Monte Carlo (MC) simulation of a 6 MV Elekta Versa-HD linear accelerator at King Abdulaziz University Hospital (KAUH). The simulation data using GATE 8.1 was benchmarked against measured data at KAUH. The simulation comprises treatment head, Multi-Leaf Collimators (MLCs), and homogeneous water phantom, whereas the measured data was performed using MP3 phantom and PTW 31,010, 0.125 cm³ Semiflex Chamber. Dose depth distribution and dose profiles were carried out at three different field sizes 10x10, 20x20, and 30 × 30 cm². The calculated TPR_20,10 for the simulated data was found to be 0.658, 1.1% less than the measured TPR_20,10 which was found to be 0.666. The obtained results indicate good agreement between the simulated and measured data, where Gamma Index 3%/3 mm criteria reached values of 97% and 90% for relative dose and dose profiles, respectively.

摘要

这项研究的目的是验证阿卜杜勒阿齐兹国王大学医院（KAUH）的6 MV Elekta Versa-HD线性加速器的GATE 8.1放射治疗蒙特卡罗（MC）模拟。使用GATE 8.1的仿真数据与KAUH的测量数据进行了基准比较。该模拟包括处理头，多叶准直器（MLC）和均质水体模，而测量数据是使用MP3体模和PTW 31,010，0.125 cm ³ Semiflex Chamber进行的。剂量深度分布和剂量分布在三种不同的场大小10x10、20x20和30×30 cm ^2下进行。发现仿真数据的TPR _20,10为0.658，比实测TPR _20,10低1.1％被发现是0.666。获得的结果表明，模拟数据与测量数据之间具有良好的一致性，其中相对剂量和剂量曲线的Gamma指数3％/ 3 mm标准分别达到97％和90％的值。