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Proceedings Paper

Small-angle approximation to determine radiance distribution of a finite beam propagating through a turbid medium
Author(s): Anna N. Yaroslavsky; Ilya V. Yaroslavsky; Hans-Joachim Schwarzmaier M.D.
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Paper Abstract

In optics of biotissues it is often required to determine the radiance distribution function of a finite beam propagating through a turbid medium. One particular instance of this problem is the determination of the signal registered by a detector with a limited field of view, placed on the axis of beam propagation. Since most biological tissues exhibit a high anisotropy factor of scattering, the problem can be approached by applying the small-angle approximation of the radiative transfer theory. We have developed a technique for solving the small-angle problem in case of the Henyey-Greenstein phase function. The technique accounts for an arbitrary spatial and angular profile of the incident beam. The results of the numerical tests have shown a good agreement with the predictions of forward Monte Carlo simulations for a variety of optical properties typical for biological tissues.

Paper Details

Date Published: 14 January 1998
PDF: 11 pages
Proc. SPIE 3195, Laser-Tissue Interaction, Tissue Optics, and Laser Welding III, (14 January 1998); doi: 10.1117/12.297884
Show Author Affiliations
Anna N. Yaroslavsky, Heinrich-Heine Univ. (Germany)
Ilya V. Yaroslavsky, Heinrich-Heine Univ. (Germany)
Hans-Joachim Schwarzmaier M.D., German National Research Ctr. for Information Technology (Germany)

Published in SPIE Proceedings Vol. 3195:
Laser-Tissue Interaction, Tissue Optics, and Laser Welding III
Guy P. Delacretaz; Guilhem Godlewski M.D.; Roberto Pini; Rudolf W. Steiner; Lars Othar Svaasand, Editor(s)

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