| 利用蒙特卡罗方法设计医用加速器均整器 |
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| 引用本文： | 潘夫兴,罗文芸,周诗情,董晓庆,王传珊,陈捷,吴国华,查元梓,蒋马伟.利用蒙特卡罗方法设计医用加速器均整器[J].上海大学学报(自然科学版),2011(6):751-756. |
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| 作者姓名： | 潘夫兴 罗文芸 周诗情 董晓庆 王传珊 陈捷 吴国华 查元梓 蒋马伟 |
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| 作者单位： | 上海大学射线应用研究所;上海交通大学医学院附属新华医院放疗科; |
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| 基金项目： | 上海市科委基金重点资助项目(08JC1410200) |
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| 摘 要： | 采用BEAMnrc程序构建医用直线加速器治疗头模型,模拟计算几种单一材料或复合材料构成的均整器对应的射野剂量分布情况.通过对各组射野离轴比(off-axial ratio,OAR)、离轴剂量分布和能量注量分布曲线进行分析并与GB 15213-94国家标准对照,设计具有较好均整度的复合材料均整器.讨论粒子角分布、X射线剂...
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| 关 键 词： | BEAMnrc 均整器 相空间数据 离轴比 百分深度剂量 |
Design Flattening Filter of Medical Accelerator Using Monte Carlo Method |
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| PAN Fu-xing,LUO Wen-yun,ZHOU Shi-qing,DONG Xiao-qing,WANG Chuan-shan,CHEN Jie,WU Guo-hua,ZHA Yuan-zi,JIANG Ma-wei.Design Flattening Filter of Medical Accelerator Using Monte Carlo Method[J].Journal of Shanghai University(Natural Science),2011(6):751-756. |
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| Authors: | PAN Fu-xing LUO Wen-yun ZHOU Shi-qing DONG Xiao-qing WANG Chuan-shan CHEN Jie WU Guo-hua ZHA Yuan-zi JIANG Ma-wei |
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| Institution: | PAN Fu-xing1,LUO Wen-yun1,ZHOU Shi-qing1,DONG Xiao-qing1,WANG Chuan-shan1,CHEN Jie1,WU Guo-hua2,ZHA Yuan-zi2,JIANG Ma-wei2(1.Shanghai Applied Radiation Institute,Shanghai University,Shanghai 200444,China,2.Department of Radiation Therapy,Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine,Shanghai 200092,China) |
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| Abstract: | Using BEAMnrc to model the beam geometry of medical linear accelerator treatment head,X-ray dose distribution for a field sized 10 cm×10 cm is calculated after the X-ray passed through a flattening filter consisting of single material or multi-material.By comparing the results of the off-axial ratio(OAR),the off-axis dose distribution and off-axis energy fluence distribution curves under GB 15213—94,a multi-material flattening filter with better flatness is designed.Angular distribution of particles,X-ray dose rate and charged particles pollution are discussed.The results show that this flattening filter has advantages including good flatness,satisfactory forward shooting property of particles,and low pollution of charged particles. |
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| Keywords: | BEAMnrc flattening filters phase space files off-axial ratio(OAR) percentage depth dose(PDD) |
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