Time-Dependent FEM Analysis of Photon Migration in Biological Tissues

概要

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Time-resolved spectroscopy is expected to be developed for optical imaging of biological tissues which strongly scatter and weakly absorb light. It is necessary to understand the transmission behavior of light impulses incident on such scattering and absorbing media. One of the numerical methods used to solve the photon diffusion equation is the finite element method (FEM). We report the FEM results of temporal variation of transmittance of light impulses through scattering slabs and cylinders. FEM results of transmittances through homogeneously scattering and absorbing slabs are shown and compared with the results obtained by a Monte Carlo method which is believed to provide more accurate results, although much longer computation time is necessary for a Monte Carlo method. The FEM results for cylinders with homogeneous scattering and inhomogeneous absorption are also presented. The effects of the location and size of the localized absorbing volume on the transmittances are investigated.
一般社団法人日本機械学会の論文
1996-11-15