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Photon-transport forward model for imaging in turbid media

机译:浑浊介质中成像的光子传输正向模型

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摘要

A photon-transport forward model for image reconstruction in turbid media is derived that treats weak inhomogeneities through a Born approximation of the Boltzmann radiative transfer equation. This model can conveniently replace the commonly used diffusion approximation in optical tomography. An analytical expression of the background Green's function is obtained from the cumulant solution of the Boltzmann equation. Our model provides the correct behavior of photon migration at early times and reduces at long times to the center-moved diffusion approximation. Numerical comparisons between this model and the standard and center-moved diffusion models are presented.
机译:推导了用于在浑浊介质中重建图像的光子正向传输模型,该模型通过玻尔兹曼辐射传递方程的Born近似来处理弱的不均匀性。该模型可以方便地替代光学层析成像中常用的扩散近似。背景格林函数的解析表达式是从Boltzmann方程的累积解中获得的。我们的模型在早期提供了正确的光子迁移行为,并在长时间内减小了中心移动扩散近似值。给出了该模型与标准和中心移动扩散模型之间的数值比较。

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