6 MV Truebeam治疗头的MC模拟与特性研究
发布时间：2019-02-15 01:55
【摘要】：用MC程序EGSnrc准确快速地模拟6 MV Varian Truebeam医用直线加速器治疗头,分析其能谱特性,并验证模拟结果的准确性,为后续更精确的剂量计算建立基础。以Varian公司提供的出束窗口位置处的IAEA相空间文件作为输入源,模拟计算源皮距为100 cm,射野大小为10 cm×10 cm的治疗野平面上的粒子相空间分布,并以此粒子相空间数据为基础进一步模拟计算了边长为30 cm的标准水体模中的剂量分布。通过对数据分析得到了治疗野平面上的粒子能谱、角分布、平均能量、粒子注量等信息,以及均匀水体模中光子的百分深度剂量和离轴比,所得结果与文献报道符合较好。结果表明EGSnrc程序能够准确快速地模拟加速器治疗头,其剂量的模拟计算结果可为临床放射治疗供很好参考。
[Abstract]:The treatment head of 6 MV Varian Truebeam medical linear accelerator was simulated accurately and quickly by MC program EGSnrc. The energy spectrum characteristics of the head were analyzed and the accuracy of the simulation results was verified. The basis for more accurate dose calculation was established. Using the IAEA phase space file at the location of the beam exit window provided by Varian as the input source, the particle phase space distribution on the therapeutic field plane with a skin distance of 100 cm, and a field size of 10 cm 脳 10 cm was simulated and calculated. Based on the particle phase space data, the dose distribution in the standard water model with side length of 30 cm was further simulated and calculated. The information of particle energy spectrum, angular distribution, average energy, particle flux, and the percentage depth dose and off-axis ratio of photons in uniform water model are obtained by analyzing the data. The results are in good agreement with those reported in the literature. The results show that the EGSnrc program can accurately and rapidly simulate the accelerator head, and the dose simulation results can be used as a good reference for clinical radiotherapy.
【作者单位】： 南华大学核科学技术学院;
【分类号】：R730.55
本文编号：2422840
[Abstract]:The treatment head of 6 MV Varian Truebeam medical linear accelerator was simulated accurately and quickly by MC program EGSnrc. The energy spectrum characteristics of the head were analyzed and the accuracy of the simulation results was verified. The basis for more accurate dose calculation was established. Using the IAEA phase space file at the location of the beam exit window provided by Varian as the input source, the particle phase space distribution on the therapeutic field plane with a skin distance of 100 cm, and a field size of 10 cm 脳 10 cm was simulated and calculated. Based on the particle phase space data, the dose distribution in the standard water model with side length of 30 cm was further simulated and calculated. The information of particle energy spectrum, angular distribution, average energy, particle flux, and the percentage depth dose and off-axis ratio of photons in uniform water model are obtained by analyzing the data. The results are in good agreement with those reported in the literature. The results show that the EGSnrc program can accurately and rapidly simulate the accelerator head, and the dose simulation results can be used as a good reference for clinical radiotherapy.
【作者单位】： 南华大学核科学技术学院;
【分类号】：R730.55
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