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Proceedings Paper

Two-layered turbid media with steady-state and frequency- and time-domain reflectance
Author(s): Alwin Kienle; Michael S. Patterson; Nora Doegnitz-Utke; Roland Bays; Georges A. Wagnieres; Hubert van den Bergh
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Paper Abstract

Light propagation in two-layered turbid media having an infinitely thick second layer is investigated in the steady- state, frequency and time domains. A solution of the diffusion approximation to the transport equation is derived employing the extrapolated boundary condition and the Fourier transform technique. We compare the reflectance calculated from this solution to that computed with Monte Carlo simulations and show good agreement. The derived equations are used to calculate mean optical path lengths in a two-layered model representing a fat layer lying above a muscle layer. The results are applied to interpret near infrared spectroscopy measurements on skeletal muscle. It is shown that the fat layer influences strongly the measurements even if the separation of the source and detector is large.

Paper Details

Date Published: 1 January 1998
PDF: 10 pages
Proc. SPIE 3194, Photon Propagation in Tissues III, (1 January 1998); doi: 10.1117/12.301065
Show Author Affiliations
Alwin Kienle, Swiss Federal Institute of Technology (Switzerland)
Michael S. Patterson, Hamilton Regional Cancer Ctr. (Canada) and McMaster Univ. (Canada)
Nora Doegnitz-Utke, Swiss Federal Institute of Technology (Switzerland)
Roland Bays, Swiss Federal Institute of Technology (Switzerland)
Georges A. Wagnieres, Swiss Federal Institute of Technology (Switzerland)
Hubert van den Bergh, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 3194:
Photon Propagation in Tissues III
David A. Benaron; Britton Chance; Marco Ferrari, Editor(s)

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