Three-dimensional Neumann-series approach to model light transport in nonuniform media.
Three-dimensional Neumann-series approach to model light transport in nonuniform media.
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DOI：
10.1364/josaa.29.001885
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发表时间：
2012-09-01
期刊：
影响因子：
--
通讯作者：
Hartman JH
中科院分区：
文献类型：
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作者：
Jha AK;Kupinski MA;Barrett HH;Clarkson E;Hartman JH
我们提出了一个三维（3D）Neumann系列的方法来模拟光子在非均匀介质中的传播，使用辐射输运方程（RTE）的实施，验证和性能。的RTE实现非均匀散射介质中的球谐基础上的扩散光学成像设置。该方法是可并行的，并在由NVIDIA Tesla C2050图形处理单元（GPU）组成的计算系统上实现。GPU的实现提供了一个加速高达两个数量级以上的非GPU实现，这导致了良好的计算效率的纽曼级数方法。使用该方法的结果进行了比较，得到的结果使用Monte Carlo模拟各种小几何体的幻影，并观察到良好的协议。我们观察到，在许多情况下，扩散近似是不准确的纽曼级数的方法给出了准确的结果。
We present the implementation, validation, and performance of a three-dimensional (3D) Neumann-series approach to model photon propagation in nonuniform media using the radiative transport equation (RTE). The RTE is implemented for nonuniform scattering media in a spherical harmonic basis for a diffuse-optical-imaging setup. The method is parallelizable and implemented on a computing system consisting of NVIDIA Tesla C2050 graphics processing units (GPUs). The GPU implementation provides a speedup of up to two orders of magnitude over non-GPU implementation, which leads to good computational efficiency for the Neumann-series method. The results using the method are compared with the results obtained using the Monte Carlo simulations for various small-geometry phantoms, and good agreement is observed. We observe that the Neumann-series approach gives accurate results in many cases where the diffusion approximation is not accurate.