| 清华同源双束医用加速器蒙特卡罗模拟 |
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| 引用本文： | 马悦,吴朝霞,王石,刘亚强. 清华同源双束医用加速器蒙特卡罗模拟[J]. 中国医学物理学杂志, 2011, 28(3): 2616-2620. DOI: 10.3969/j.issn.1005-202X.2011.03.012 |
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| 作者姓名： | 马悦 吴朝霞 王石 刘亚强 |
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| 作者单位： | 清华大学,工程物理系粒子技术与辐射成像教育部重点实验室,北京,100084 |
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| 摘 要： | 目的:使用蒙特卡罗方法模拟清华大学自主研制的同源双束医用加速器,为今后研究该设备KV级能量在放射治疗中成像剂量分布奠定基础。方法:(1)借助蒙卡BEAMnrc程序模拟加速器机头得到相空间文件。(2)以该相空间文件为源,使用蒙卡DOSXYZnrc程序计算水模体中百分深度剂量(percent depth dose,PDD)和离轴比(off axis ratio,OAR),采用MATLAB编程提取剂量数据显示于EXCEL。(3)分析蒙卡模拟参数对结果的影响。(4)对比实测调整模拟参数。结果:蒙卡模拟所得水模体中PDD和OAR曲线与实测有很好的吻合,得到加速器机头模型。结论:医用加速器KV级能量蒙卡模拟与高能有明显不同;要得到合适的该加速器蒙卡模型,需要选择合适的电子束能量和电子空间密度分布;该模拟所得加速器模型可用于成像剂量分布等后续研究。
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| 关 键 词： | 同源双束加速器 蒙卡模拟 剂量分布 |
The Monte Carlo Simulation of Tsinghua Homo-Source Dual-Beam Medical Accelerator |
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| MA Yue,WU Zhao-xia,WANG Shi,LIU Ya-qiang. The Monte Carlo Simulation of Tsinghua Homo-Source Dual-Beam Medical Accelerator[J]. Chinese Journal of Medical Physics, 2011, 28(3): 2616-2620. DOI: 10.3969/j.issn.1005-202X.2011.03.012 |
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| Authors: | MA Yue WU Zhao-xia WANG Shi LIU Ya-qiang |
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| Affiliation: | MA Yue,WU Zhao-xia,WANG Shi,LIU Ya-qiang(Key Laboratory of Particle & Radiation Imaging,Tsinghua University,Ministry of Education,Beijing 100084,China) |
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| Abstract: | Objective:To apply Monte Carlo method in simulating the Homo-Source Dual-Beam medical accelerator developed by Tsinghua University and lay the foundation for future researches on the Accelerator's KV energy dose distribution in an image-guided radiotherapy procedure.Methods:(1)Using Monte Carlo's BEAMnrc program for simulating the head of Tsinghua Homo-Source Dual-Beam Medical Accelerator we obtained the Phase Space file which would be used as the source for the next step.(2) Using Monte Carlo's DOSXYZnrc p... |
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| Keywords: | Homo-Source Dual-Beam medical accelerator Monte Carlo simulation dose distribution |
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