| The penetration, diffusion and energy deposition of high—energy photon＊ |
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| 引用本文： | 罗正明,勾成俊,Wolfram Laub.The penetration, diffusion and energy deposition of high—energy photon＊[J].中国物理 B,2003,12(7):803-808. |
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| 作者姓名： | 罗正明 勾成俊 Wolfram Laub |
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| 作者单位： | (1)Institute of Nuclear Science and Technology, Sichuan University and Key Laboratory for Radiation Physics and Technology of the Education Ministry of China, Chengdu 610064, China; (2)Radiation Oncology, William Beaumont Hospital, 3601 West 13 Mile Road, Royal Oak, Michigan 48073-6769, USA |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 10075033) and the International Atomic Energy Agency (Grant No 8064/RB). |
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| 摘 要： | This paper presents a new theory for calculating the transport of high-energy photons and their secondary charged particles. We call this new algorithm characteristic line method, which is completely analytic. Using this new method we cannot only accurately calculate the transport behaviour of energetic photons, but also precisely describes the transport behaviour and energy deposition of secondary electrons, photoelectrons, Compton recoil electrons and positron－electron pairs. Its calculation efficiency is much higher than that of the Monte Carlo method. The theory can be directly applied to layered media situation and obtain a pencil-beam-modelled solution. Therefore, it may be applied to clinical applications for radiation therapy.
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| 关 键 词： | 高能光子 能量沉积 特征线方法 渗透 扩散 光子传输 |
| 收稿时间： | 2002-12-26 |
The penetration, diffusion and energy deposition of high-energy photon |
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| Luo Zheng-Ming,Gou Cheng-Jun and Wolfram Laub.The penetration, diffusion and energy deposition of high-energy photon[J].Chinese Physics B,2003,12(7):803-808. |
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| Authors: | Luo Zheng-Ming Gou Cheng-Jun and Wolfram Laub |
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| Institution: | Institute of Nuclear Science and Technology, Sichuan University and Key Laboratory for Radiation Physics and Technology of the Education Ministry of China, Chengdu 610064, China; Radiation Oncology, William Beaumont Hospital, 3601 West 13 Mile Road, Royal Oak, Michigan 48073-6769, USA |
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| Abstract: | This paper presents a new theory for calculating the transport of high-energy photons and their secondary charged particles. We call this new algorithm characteristic line method, which is completely analytic. Using this new method we cannot only accurately calculate the transport behaviour of energetic photons, but also precisely describes the transport behaviour and energy deposition of secondary electrons, photoelectrons, Compton recoil electrons and positron－electron pairs. Its calculation efficiency is much higher than that of the Monte Carlo method. The theory can be directly applied to layered media situation and obtain a pencil-beam-modelled solution. Therefore, it may be applied to clinical applications for radiation therapy. |
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| Keywords: | high-energy photon energy deposition characteristic line method |
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