Delta-P1近似漫反射光学模型的二阶参量灵敏度

王锐; 王玉山

石河子大学理学院物理系,石河子,832000

石河子大学水利建筑工程学院,石河子,832000

Sensitivity of Delta-P1 approximation model to second-order parameter

摘要: 基于Delta-P1近似漫反射光学模型，推导了双点源近似下空间分辨漫反射解对于Henyey—Greenstein散射相函数的二阶参量7的灵敏度表达式，研究了参量7对漫反射分布的影响．研究表明，与漫射近似模型相比，Delta—P1近似漫反射光学模型不仅含有散射相函数的二阶参量％而且在弱吸收或强吸收的情况下，参量7对于光源附近（p〈1．0mm）的空间分辨漫反射都存在较大的影响（极值大于30％）．因此利用7研究漫反射光分布对于获取组织光学信息具有重要的意义．

关键词:

Abstract: The sensitivity of the second-order parameter "7 of the Henyey-Greenstein phase function based on the spatially-resolved diffuse reflectance within the two-point-source approximation to the Delta-P1 approximation model is studied, and the analytical expression of the sensitivity is derived. The results show that the analytic solution of the Delta-P1 approximation model for reflectance contains the second-order parameter "7 of the scattering phase function compared with the diffusion approximation model, and the second- order parameter "7 has significant influence (the extreme value greater than 30%) on the analytic solution for spatially-resolved diffuse reflectance with small source-detector separations (p 〈 1.5 mm) no matter whether the absorption is weak or strong. The research has theoretical significance for obtaining the optical information abour tissue with the second-order parameter %

Delta-P1近似漫反射光学模型的二阶参量灵敏度

石河子大学理学院物理系,石河子,832000

石河子大学水利建筑工程学院,石河子,832000

关键词:

Sensitivity of Delta-P1 approximation model to second-order parameter

石河子大学理学院物理系,石河子,832000

石河子大学水利建筑工程学院,石河子,832000

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