基于Monte Carlo方法的扩散光在组织体中传输过程研究  

Based on Monte Carlo Simulation for Optical Transmission in Tissue

作　　者：王雪峰[1,2] 陈兴稣[1] 郜参观[1] 

机构地区：[1]伊犁师范学院电子与信息工程学院,伊宁835000 [2]南京大学电子科学与工程学院,南京210046

出　　处：《科学技术与工程》2016年第5期196-200,共5页Science Technology and Engineering

基　　金：国家自然科学基金项目(61363066)资助

摘　　要：光在组织体中的传输过程是扩散光的随机吸收和散射的过程,采用辐射传输方程来表示,由于方程比较复杂,无法直接得到解析解,传统方法是通过蒙特卡罗(Monte Carlo)仿真模拟。通过对经典蒙特卡罗方法中的步长和权重的更改,完成对光子在组织体中传输过程的快速仿真。在相同的仿真条件下,同时对经典蒙特卡罗方法和改进的方法进行仿真实验,改进方法能够大幅度提高仿真速度;并对于含有异质子的组织体进行仿真,结果表明改进的方法不仅提高了速度,而且保证了实验结果的准确性。Light transmission in tissue is a random process of absorption and scattering of diffuse optical, and expressed by the radiative transfer equation. Because the equation is complex, it can＇ t get the analytic solution di- rectly, and the traditional method is the Monte Carlo simulation. A modified method is proposed in step and weight of traditional Monte Carlo simulation, which can complete the photons transmission process in tissue quickly. With the same simulation conditions, the experiment is simulated by the Monte Carlo method and improved method, and it shows the improved method can greatly improve the simulation speed. Then the simulation results with heteroge- neous medium show that the proposed method is effectiveness, Which can not only improve the speed, but also ensure the accuracy.

关 键 词：蒙特卡罗仿真 扩散光 步长 权重 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]