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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 13 — May. 1, 1998
  • pp: 2774–2780

Real-time method for fitting time-resolved reflectance and transmittance measurements with a Monte Carlo model

Antonio Pifferi, Paola Taroni, Gianluca Valentini, and Stefan Andersson-Engels  »View Author Affiliations


Applied Optics, Vol. 37, Issue 13, pp. 2774-2780 (1998)
http://dx.doi.org/10.1364/AO.37.002774


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Abstract

An efficient method is proposed for the evaluation of the absorption and the transport scattering coefficients from a time-resolved reflectance or transmittance distribution. The procedure is based on a library of Monte Carlo simulations and is fast enough to be used in a nonlinear fitting algorithm. Tests performed against both Monte Carlo simulations and experimental measurements on tissue phantoms show that the results are significantly better than those obtained by fitting the data with the diffusion approximation, especially for low values of the scattering coefficient. The method requires an a priori assumption on the value of the anisotropy factor g. Nonetheless, the transport scattering coefficient is rather independent of the exact knowledge of the g value within the range 0.7 < g < 0.9.

© 1998 Optical Society of America

OCIS Codes
(170.6510) Medical optics and biotechnology : Spectroscopy, tissue diagnostics
(290.7050) Scattering : Turbid media
(300.6500) Spectroscopy : Spectroscopy, time-resolved

History
Original Manuscript: January 9, 1998
Published: May 1, 1998

Citation
Antonio Pifferi, Paola Taroni, Gianluca Valentini, and Stefan Andersson-Engels, "Real-time method for fitting time-resolved reflectance and transmittance measurements with a Monte Carlo model," Appl. Opt. 37, 2774-2780 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-13-2774


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