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用蒙特卡罗法研究折射率对光在组织中的漫反射率和吸收比的影响
引用本文:程树英,沈鸿元,陈美锋.用蒙特卡罗法研究折射率对光在组织中的漫反射率和吸收比的影响[J].中国激光,2004,31(2):69-172.
作者姓名:程树英  沈鸿元  陈美锋
作者单位:1. 福州大学电子科学与应用物理系,福建,福州,350002;中国科学院福建物质结构研究所,福建,福州,350002
2. 中国科学院福建物质结构研究所,福建,福州,350002
3. 福州大学电子科学与应用物理系,福建,福州,350002
基金项目:福建省教委基金 (JB0 0 0 87),福州大学基金 (2 0 0 2 XQ 2 4 )资助项目
摘    要:用蒙特卡罗(Monte Carlo,M—C)法分别对光在人肺组织和人体动脉三层组织中的传输特性进行了研究,得到如下结果:漫反射率Rd随着组织折射率n的增大线性减小,而吸收比A随着组织折射率n的增大几乎是线性地增大。但对于多层组织来说,越深层处的折射率对Rd的影响越小,并且由于各层组织的厚度和光学特性不同,各层组织的折射率对吸收比A的影响也有所不同。因此,折射率是生物组织不可忽视的一个重要参数。

关 键 词:统计模拟  折射率  蒙特卡罗  漫反射率  吸收比
收稿时间:2002/9/18

Research on the Influence of Refractive Index on Diffuse Reflectance and Absorptance in Tissue by Monte Carlo Method
CHENG Shu-ying ,SHEN Hong-yuan ,CHEN Mei-feng.Research on the Influence of Refractive Index on Diffuse Reflectance and Absorptance in Tissue by Monte Carlo Method[J].Chinese Journal of Lasers,2004,31(2):69-172.
Authors:CHENG Shu-ying    SHEN Hong-yuan  CHEN Mei-feng
Affiliation:CHENG Shu-ying 1,2,SHEN Hong-yuan 2,CHEN Mei-feng 1 1Department of Electronic Science and Applied Physics,Fuzhou University,Fuzhou,Fujian 350002,China 2Fujian Institute of Research on the Structure of Matter,The Chinese Academy of Sciences,Fuzhou,Fujian 350002,China
Abstract:The light propagations in human lung and three-layer artery are simulated by Monte Carlo method. It results that, with the increasing of the refractive index, the diffuse reflectance R_d is linearly decreased and absorptance A is almost linearly increased. But for multi-layer tissues, the influence of the refractive index in the deeper layer of the tissue on R_d is less, and the influence of the refractive index in the different layer of the tissue on A is different because each layer has its own thickness and optical property. Therefore, the refractive index is a very important parameter in bio-tissue.
Keywords:statistical analog  refractive index  Monte Carlo  diffuse reflectance  absorptance
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