| 整体考虑靶和均整器的设计来提高医用加速器剂量率的方法 | |
| 孔潇潇 ; 赵洪斌 ; 李泉凤 ; 林晓奇 ; KONG Xiao-Xiao ; ZHAO Hong-Bin ; LI Quan-Feng ; LIN Xiao-Qi | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 蒙特卡罗方法 医用加速器 Monte Carlo method, target, accelerator TH789 |
| 其他题名 | A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System when Designing the Target |
| 中文摘要 | 通常低能医用加速器靶的设计遵从厚靶原则,即采用厚度等于或大于电子射程的靶,使靶后无电子污染.本文提出了新的靶设计概念:设计靶时,将靶与相关系统(初级准直锥、均整器)作为一个整体考虑,通过减小靶厚来提高光子剂量率,利用初级准直锥、均整器来减少电子污染.采用这种设计概念,用蒙特卡罗方法对BJ-6——6MV单光子医用电子直线加速器的靶进行优化设计.模拟计算10cm×10cm野,30cm×30cm野的深度剂量曲线,结果表明:较之现有的厚靶,治疗剂量提高了10%,同时表面剂量、X射线的品质仍满足国标的要求.通过薄靶、厚靶的加速器整机对比实验,已验证了此结论的正确性.; Generally, the design of the target used in the medical electron accelerator follows the thick-target rule, that is, using a target thicker than the electron range to make almost no electrons penetrating out of the target. In this article, a new rule of target design is proposed. The target and the relevant components (primary collimator and flattening filter) are considered as a whole system when designing the target, that is, using a thinner target to increase the dose rate and using the primary collimator and the flattening filter to reduce the contaminated electrons. To improve the dose rate in the treatment, an optimization is given to the target design of BJ-6, a 6MV medical linear electron accelerator, by using Monte Carlo method. By using MC codes of MCNP and BEAMnrc, simulations are given to calculate the percent depth dose profiles in the 10cm�cm field and the 30cm�cm field respectively. The surface dose satisfies the national standards and the dose rate in treatment increases 10 percent of that of the present thick-target. The feasibility of this method has been tested by experiment. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/63184]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 孔潇潇,赵洪斌,李泉凤,等. 整体考虑靶和均整器的设计来提高医用加速器剂量率的方法[J],2010, 2010. |
| APA | 孔潇潇.,赵洪斌.,李泉凤.,林晓奇.,KONG Xiao-Xiao.,...&LIN Xiao-Qi.(2010).整体考虑靶和均整器的设计来提高医用加速器剂量率的方法.. |
| MLA | 孔潇潇,et al."整体考虑靶和均整器的设计来提高医用加速器剂量率的方法".(2010). |
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