| 连续光在生物组织中能流率分布的漫射近似和模拟 |
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| 引用本文： | 许棠,张春平,王新宇,张连顺,田建国.连续光在生物组织中能流率分布的漫射近似和模拟[J].光子学报,2003,32(5):571-575. |
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| 作者姓名： | 许棠 张春平 王新宇 张连顺 田建国 |
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| 作者单位： | 南开大学物理科学学院光子学中心,天津,300071 |
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| 基金项目： | 教育部科学技术研究重点项目 ( 990 19) |
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| 摘 要： | 分析了半无限大介质漫射近似不同边界条件的镜像光源结构,用镜像光源的方法给出了连续光入射时稳态能流率分布的漫射近似表达式,并用Monte Carlo方法对能流率分布进行模拟,分析了两种模型能流率分布的特点及其形成的机理;用Monte Carlo模拟结果检验了能流率分布漫射近似的精度,结果表明:漫射近似采用EBC边界条件的结果有较高的精度和计算较简单等优点,为能流率分布的快速准确计算提供了依据.
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| 关 键 词： | 生物组织 能流率 漫射近似 边界条件 MonteCarlo模拟 |
| 收稿时间： | 2002/7/1 |
| 修稿时间： | 2002年7月1日 |
Diffusion Approximation and Modeling for Fluence Rate Distribution of the CW-light in Biological |
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| Xu Tang,Zhang Chunping,Wang Xinyu,Zhagn Lianshun,Tian Jianguo Photonics Center.Diffusion Approximation and Modeling for Fluence Rate Distribution of the CW-light in Biological[J].Acta Photonica Sinica,2003,32(5):571-575. |
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| Authors: | Xu Tang Zhang Chunping Wang Xinyu Zhagn Lianshun Tian Jianguo Photonics Center |
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| Institution: | Xu Tang,Zhang Chunping,Wang Xinyu,Zhagn Lianshun,Tian Jianguo Photonics Center,Institute of Physics,Nankai University,Tianjin,300071 |
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| Abstract: | From the diffusion approximation equation, the configuration of image sources for different boundary conditions in a semi-infinite turbid medium are analyzed, the diffusion approximation expressions of the steady-state fluence rate are given by method of image sources and the fluence rate distributions are simulated by using Monte Carlo method, The fluence rate distributions of the two model are analyzed for the two model under the cw-light is directed perpendicularly to the surface of biological tissues. It is shown the diffusion approximation for the EBC boundary condition has the better precision and the calculation is simpler than the other two methods. |
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| Keywords: | Biological tissue Fluence rate Diffusion approximation Boundary conditions Monte Carlo simulation |
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