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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 19 — Jul. 1, 1993
  • pp: 3585–3595

Analytical model for extracting intrinsic fluorescence in turbid media

Jun Wu, Michael S. Feld, and Richard P. Rava  »View Author Affiliations


Applied Optics, Vol. 32, Issue 19, pp. 3585-3595 (1993)
http://dx.doi.org/10.1364/AO.32.003585


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Abstract

In this paper we describe a photon migration approach for modeling fluorescence in an optically thick, turbid medium such as human tissue. In such a medium the intrinsic fluorescence spectrum of the fluorophores ϕ can be distorted by the interplay of many factors, including scattering and absorption, excitation and collection geometries, and boundary conditions. The model provides an analytical relationship between the bulk fluorescence spectrum F and the diffuse reflectance spectrum R for arbitrary geometries and boundary conditions. We demonstrate that the distortion can be simply and accurately removed by measuring R from the optically thick medium over the same wavelength range and in the same manner as F. Over a wide range of tissue parameters this relationship may be written as ϕ∝ F/Reff, with Reff a corrected form of the measured diffuse reflectance. The validity of this approach is demonstrated in both laboratory experiments on human aortic media and by comparison with Monte Carlo simulations and diffusion theory. Connection with a previous algorithm for extracting intrinsic fluorescence is also discussed.

© 1993 Optical Society of America

History
Original Manuscript: June 2, 1992
Published: July 1, 1993

Citation
Jun Wu, Michael S. Feld, and Richard P. Rava, "Analytical model for extracting intrinsic fluorescence in turbid media," Appl. Opt. 32, 3585-3595 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-19-3585

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