Bahreyni-Toosi Mohammad-Taghi, Nasseri Shahrokh, Momennezhad Mahdi, Hasanabadi Fatemeh, Gholamhosseinian Hamid
Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
J Med Signals Sens. 2014 Oct;4(4):267-73.
The aim of this study is to provide a control software system, based on Monte Carlo simulation, and calculations of dosimetric parameters of standard and wedge radiation fields, using a Monte Carlo method. GATE version 6.1 (OpenGATE Collaboration), was used to simulate a compact 6 MV linear accelerator system. In order to accelerate the calculations, the phase-space technique and cluster computing (Condor version 7.2.4, Condor Team, University of Wisconsin-Madison) were used. Dosimetric parameters used in treatment planning systems for the standard and wedge radiation fields (10 cm × 10 cm to 30 cm × 30 cm and a 60° wedge), including the percentage depth dose and dose profiles, were measured by both computational and experimental methods. Gamma index was applied to compare calculated and measured results with 3%/3 mm criteria. Gamma index was applied to compare calculated and measured results. Almost all calculated data points have satisfied gamma index criteria of 3% to 3 mm. Based on the good agreement between calculated and measured results obtained for various radiation fields in this study, GATE may be used as a useful tool for quality control or pretreatment verification procedures in radiotherapy.
本研究的目的是提供一个基于蒙特卡罗模拟的控制软件系统，并使用蒙特卡罗方法计算标准和楔形辐射场的剂量学参数。使用GATE版本6.1（OpenGATE合作团队）模拟一个紧凑型6兆伏直线加速器系统。为了加速计算，采用了相空间技术和集群计算（Condor版本7.2.4，威斯康星大学麦迪逊分校Condor团队）。通过计算和实验方法测量了治疗计划系统中标准和楔形辐射场（10厘米×10厘米至30厘米×30厘米以及60°楔形）的剂量学参数，包括百分深度剂量和剂量分布。应用伽马指数以3%/3毫米标准比较计算结果和测量结果。应用伽马指数比较计算结果和测量结果。几乎所有计算数据点都满足3%至3毫米的伽马指数标准。基于本研究中针对各种辐射场获得的计算结果和测量结果之间的良好一致性，GATE可作为放射治疗中质量控制或治疗前验证程序的有用工具。
