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  4. Monte Carlo study of diffuse reflectance at source-detector separations close to one transport mean free path
 
research article

Monte Carlo study of diffuse reflectance at source-detector separations close to one transport mean free path

Bevilacqua, Frédéric
•
Depeursinge, Christian  
1999
Journal of the Optical Society of America A

The spatially resolved reflectance of turbid media is studied at short source–detector separations (approximately one transport mean free path) with Monte Carlo simulations. For such distances we found that the first and second moments of the phase function play a significant role in the reflectance curve, whereas the effect of higher-order moments is weak. Second-order similarity relations are tested and are found efficient at reducing the number of relevant parameters necessary to predict the reflectance. Indeed, only the four following parameters are necessary: the refractive index, the absorption coefficient, the reduced scattering coefficient, and a phase function parameter γ that depends on the first and second moments of the phase function. For media of known γ, the absorption and reduced scattering coefficients can be determined from the intensity and the slope of the log of the reflectance, measured at a single distance. Other empirical properties of the reflectance are derived from the simulations, using short-distance measurements, which provide clues for determining the scattering and absorption properties. In particular, the slope of the square root of the reflectance does not depend on the absorption coefficient but depends on both the reduced scattering coefficient and the phase function parameter γ.

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Type
research article
DOI
10.1364/JOSAA.16.002935
Web of Science ID

WOS:000088951800014

Author(s)
Bevilacqua, Frédéric
Depeursinge, Christian  
Date Issued

1999

Published in
Journal of the Optical Society of America A
Volume

16

Issue

12

Start page

2935

End page

2945

Subjects

[MVD]

•

Medical optics and biotechnology : Light propagation in tissues

•

Medical optics and biotechnology : Photon migration

•

Scattering : Backscattering

•

Scattering : Diffusion

•

Scattering : Multiple scattering

•

Scattering : Turbid media

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LOA  
Available on Infoscience
August 2, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/41939
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