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Proceedings Paper

Imaging in random media: simulating light transport by numerical integration of the diffusion equation
Author(s): Regina Model; Rolf Huenlich; D. Richter; Herbert H. Rinneberg; Heidrun Wabnitz; M. Walzel
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Paper Abstract

For solving the inverse problem in optical tomography, the simulation of light transport in highly scattering media under realistic conditions is a prerequisite. In this contribution we study both theoretically and experimentally the transport of photons in highly scattering media following injection of ultrashort laser pulses. The diffusion equation has been integrated by a two-dimensional finite element method (FEM). For comparison with FEM results, time- resolved transmittance was measured in such a way to effectively simulate a two-dimensional geometry. For the reconstruction of the interior structure an iterative method based on the FEM forward model is introduced. Using the full information contained in the time-resolved measurements, the number of sources and detectors necessary for reconstruction of inhomogeneities in optical properties can be reduced considerably. The effectiveness of the algorithm is demonstrated by some instructive examples.

Paper Details

Date Published: 31 January 1995
PDF: 12 pages
Proc. SPIE 2326, Photon Transport in Highly Scattering Tissue, (31 January 1995); doi: 10.1117/12.200818
Show Author Affiliations
Regina Model, Physikalisch-Technische Bundesanstalt (Germany)
Rolf Huenlich, Weierstrass Institute for Applied Analysis and Stochastics (Germany)
D. Richter, Physikalisch-Technische Bundesanstalt (Germany)
Herbert H. Rinneberg, Physikalisch-Technische Bundesanstalt (Germany)
Heidrun Wabnitz, Physikalisch-Technische Bundesanstalt (Germany)
M. Walzel, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 2326:
Photon Transport in Highly Scattering Tissue
Sigrid Avrillier; Britton Chance; Gerhard J. Mueller; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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