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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 17, Iss. 9 — Sep. 1, 2000
  • pp: 1671–1681

Boundary conditions for light propagation in diffusive media with nonscattering regions

Jorge Ripoll, Manuel Nieto-Vesperinas, Simon R. Arridge, and Hamid Dehghani  »View Author Affiliations


JOSA A, Vol. 17, Issue 9, pp. 1671-1681 (2000)
http://dx.doi.org/10.1364/JOSAA.17.001671


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Abstract

The diffusion approximation proves to be valid for light propagation in highly scattering media, but it breaks down in the presence of nonscattering regions. We present a compact expression of the boundary conditions for diffusive media with nonscattering regions, taking into account small-index mismatch. Results from an integral method based on the extinction theorem boundary condition are contrasted with both Monte Carlo and finite-element-method simulations, and a study of its limit of validity is presented. These procedures are illustrated by considering the case of the cerebro-spinal fluid in the brain, for which we demonstrate that for practical situations in light diffusion, these boundary conditions yield accurate results.

© 2000 Optical Society of America

OCIS Codes
(170.5270) Medical optics and biotechnology : Photon density waves
(290.1990) Scattering : Diffusion

History
Original Manuscript: November 2, 1999
Revised Manuscript: May 8, 2000
Manuscript Accepted: May 8, 2000
Published: September 1, 2000

Citation
Jorge Ripoll, Manuel Nieto-Vesperinas, Simon R. Arridge, and Hamid Dehghani, "Boundary conditions for light propagation in diffusive media with nonscattering regions," J. Opt. Soc. Am. A 17, 1671-1681 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-9-1671

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