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Proceedings Paper

Applications of reciprocity in diffusive optical tomography
Author(s): Daniel J. Townsend; Douglas M. Dugas; David A. Boas; Charles A. DiMarzio
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Paper Abstract

The photon diffusion approximation provides an accurate description for the propagation of light in a highly scattering medium such as most tissue. However, complications arise at the boundaries between such a highly scattering medium and a clear medium, as at the locations where the light enters and exits the medium. Several approximations have been developed to address the input of light from a laser through an optical fiber, and several others have been developed to address the collection of light by an optical fiber and detector. The principle of reciprocity suggests that source and detector fibers could be treated identically, resulting in a simplification of the diffusive optical model. Such a formulation agrees quite well with Monte-Carlo and other models. In the present work, we apply the technique to some different situations, including the important practical problem of source and detector fibers which are not aligned to be normal to the surface. Simple analytical results based on this model will be compared to Monte-Carlo results.

Paper Details

Date Published: 29 June 2001
PDF: 7 pages
Proc. SPIE 4250, Optical Tomography and Spectroscopy of Tissue IV, (29 June 2001); doi: 10.1117/12.434534
Show Author Affiliations
Daniel J. Townsend, Northeastern Univ. (United States)
Douglas M. Dugas, Northeastern Univ. (United States)
David A. Boas, Massachusetts General Hospital/Harvard Medical School (United States)
Charles A. DiMarzio, Northeastern Univ. (United States)

Published in SPIE Proceedings Vol. 4250:
Optical Tomography and Spectroscopy of Tissue IV
Britton Chance; Robert R. Alfano; Bruce J. Tromberg; Mamoru Tamura; Eva Marie Sevick-Muraca, Editor(s)

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