| 伽玛刀单束射线特性的Monte Carlo模拟 |
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| 引用本文： | 温光浩,刘小伟,李冕丰.伽玛刀单束射线特性的Monte Carlo模拟[J].核技术,2000,23(5):334-338. |
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| 作者姓名： | 温光浩 刘小伟 李冕丰 |
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| 作者单位： | 中山大学,广州 |
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| 摘 要： | 应用ＧＥＳ４ Ｍｏｎｔｅ Ｃａｒｌｏ程序模拟了单源情况下，＾６０Ｃｏγ射线经Ｌｅｋｓｅｌｌ Ｇａｍｍａ Ｕｎｉｔ准直系统后直射（未经散射）光子和散射光子在终准直器平面上的半径分布、能量分布及角度分布。模拟结果表明，在终准直器的外孔径范围内，直射光子数目约比散射光子数目高２－３个数量级，而在准直器孔径外，散射光子的份额不可忽略。对于光子的散射，又以康普顿散射为主，其它散射所占的份额很小，并且在准直器
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| 关 键 词： | 伽玛刀 Monte Carlo模拟 单束射线特性 |
| 修稿时间： | |
Monte
Carlo simulation of single beam in gamma knife |
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| WEN Guanghao, LIU Xiaowei, LI Mianfeng.Monte
Carlo simulation of single beam in gamma knife[J].Nuclear Techniques,2000,23(5):334-338. |
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| Authors: | WEN Guanghao LIU Xiaowei LI Mianfeng |
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| Abstract: | Characteristics of single beam collimated by Leksell Gamma Unit have been simulated using EGS4 Monte Carlo method. Results of the simulation indicated that non-scattered photons dominated in the aperture of final collimator and the number of non-scattered photons was 2 to 3 order bigger than the number of scattered Photons. Outside the aperture, the number of scattered photon could not be ignored. In addition, Compton scatter was the major interaction of photon with the final collitnator. |
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| Keywords: | Gamma knife Monte Carlo simulation Collimated system |
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