论文部分内容阅读
以delta-P1近似光学模型为基础,推导了双点源近似下空间分辨漫反射一阶散射参量μ′s灵敏度的解析式,并进行了数值分析和比较.研究表明,与混合漫射近似模型和漫射近似模型相比,delta-P1近似模型能更好地描述强散射较强吸收情况下近光源区域生物组织漫反射光子的分布,且在有效反照率a′>0.83时,获得最佳优化距离ρopt,ρopt随μ′s的增大而减小,且在距光源约2.7—4个输运平均自由程处μ′s的变化对测量吸收的影响最小.这项研究对于优化传感器几何结构以及生物组织光学参量的测量具有重要意义.
Based on the approximate optical model of delta-P1, the analytic formulas for the μs sensitivity of the first-order scattering parameters of the spatially resolved diffuse reflection at the two-point source approximation are derived and compared with the numerical results. The results show that, compared with the hybrid diffuse approximation model Compared with the diffuse approximation model, the delta-P1 approximation model can better describe the distribution of diffuse photons in the biological tissue in the near-light source region under strong scattering with strong absorption. When the effective albedo a ’> 0.83, the best The optimized distance ρopt, ρopt decreases with increasing μs, and the change of μ’s at the mean free path of 2.7-4 from the light source has the least influence on the measurement absorption.This study is very helpful to optimize the sensor geometry The measurement of structure and optical parameters of biological tissue is of great significance.