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The finite‐element method for the propagation of light in scattering media: Frequency domain case
Author(s) -
Schweiger M.,
Arridge S. R.
Publication year - 1997
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.598008
Subject(s) - scattering , optics , physics , radiative transfer , frequency domain , photon diffusion , heavy traffic approximation , computational physics , light scattering , finite element method , boundary value problem , mathematical analysis , mathematics , quantum mechanics , light source , statistics , thermodynamics
A frequency domain light transport model to simulate the transillumination of a scattering object with radio frequency intensity modulated light is presented. The model is based on the diffusion approximation to the radiative transfer equation and uses a finite‐element model to allow for complex geometries and an inhomogeneous distribution of absorption and scattering. It calculates the complex photon density within the object and the complex exitance on the boundary of the object. The model is validated against an analytic Green's function model for a circular geometry in the homogeneous case, and its accuracy is investigated for a range of mesh resolutions, optical parameters, and modulation frequencies.