Wang Xueding, Wang Lihong V
Texas A&M University, Optical Imaging Laboratory, Biomedical Engineering Program, 3120 TAMU, College Station, Texas 77843-3120, USA.
J Biomed Opt. 2002 Jul;7(3):279-90. doi: 10.1117/1.1483315.
A detailed study, based on a Monte Carlo algorithm, of polarized light propagation in birefringent turbid media is presented in this paper. Linear birefringence, which results from the fibrous structures, changes the single scattering matrix and alters the polarization states of photons propagating in biological tissues. Some Mueller matrix elements of light backscattered from birefringent anisotropic turbid media present unusual intensity patterns compared with those for nonbirefringent isotropic turbid media. This result is in good agreement with the analytic results based on the double-scattering model. Degree of polarization, Stokes parameters, and diffuse reflectance as functions of linearly birefringent parameters based on numerical results and theoretical analysis are discussed and compared in an effort to understand the essential physical processes of polarized light propagation in fibrous tissues.
本文介绍了一项基于蒙特卡罗算法的关于偏振光在双折射混浊介质中传播的详细研究。由纤维结构导致的线性双折射会改变单次散射矩阵，并改变在生物组织中传播的光子的偏振态。与非双折射各向同性混浊介质相比，从双折射各向异性混浊介质背向散射的光的一些穆勒矩阵元素呈现出不同寻常的强度模式。这一结果与基于双散射模型的分析结果高度吻合。基于数值结果和理论分析，讨论并比较了偏振度、斯托克斯参数以及作为线性双折射参数函数的漫反射率，以力图理解偏振光在纤维组织中传播的基本物理过程。
