【作者】 贾鹏翔； 包尚联；

【Author】 Pengxiang Jia Shanglian Bao (Beijing City Key Lab of Medical Physics and Engineering Peking University Beijing 100871 tree@pku.edu.cn)

【机构】 北京大学重离子物理研究所医学物理和工程北京市重点实验室；

【摘要】 本文利用Monte Carlo方法研究X射线球管阳极靶角度对输出光谱的影响。PENELOPE软件包是目前针对光子和正、负电子疏运过程进行Monte Carlo模拟的工具中,通用性、适应性较好,并被广泛认可的软件包。本文利用PENELOPE平台,建立了X射线球管的模型,实现了从电子打靶、X射线产生、经过滤光片滤波,到最后被探测器探测并记录粒子信息的全部过程。文章首先将Monte Carlo模拟结果与Spektr软件包的计算结果相比较,证实了模型的准确性和模拟的可行性,然后改变阳极靶角度,研究并分析了其对输出光谱以及有效X射线产生效率的影响。更多还原

【Abstract】 A model for generating x-ray spectra of x-ray tube is presented.Electron and Photon transport is simulated by means of the general-purpose Monte Carlo code PENELOPE,using the standard,detailed simulation scheme.The simulated x-ray spectra were compared with spectra generated by Spektr at different kVp and filter thickness and good agreements were observed.We estimate the influence of the x-ray tube anode angle to the output spectra based on the Monte Carlo method.The results were shown in this paper.更多还原