Does turbid-media time- and space-resolved reflectance depend on the different moments of the scattering phase function?

Sigrid Avrillier; Bernard Gelebart; Eric Tinet; Jean-Michel Tualle; Jean-Pierre Ollivier M.D.

doi:10.1117/12.306053

24 April 1998 Does turbid-media time- and space-resolved reflectance depend on the different moments of the scattering phase function?

Sigrid Avrillier, Bernard Gelebart, Eric Tinet, Jean-Michel Tualle, Jean-Pierre Ollivier M.D.

Author Affiliations +

Proceedings Volume 3251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications II; (1998) https://doi.org/10.1117/12.306053
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

We have already demonstrated that some optical coefficients of turbid media ((mu) _a, (mu) _s^') can be derived from time and space resolved backscattered light measurements in the case of semi-infinite geometry, or multi-layered media, using the experimental results obtained far enough from the illumination area, that is where and when the diffusion approximation is valid. Our purpose is now to determine if this type of measurements can be used to explore the different moments of the scattering phase function. The same experimental set-up consisting of a titanium-sapphire pulsed laser and a streak camera was therefore used to measure the reflectance at earlier times and closer to the light source. Experiments were performed with aqueous solutions of calibrated latex microspheres. Various values of the spheres diameter were alternately used in order to vary the anisotropy factor g. Comparison with Monte-Carlo simulations were achieved for the resolution of the inverse problem. The influence of the shape of the phase function was also investigated.

Citation Download Citation

Sigrid Avrillier, Bernard Gelebart, Eric Tinet, Jean-Michel Tualle, and Jean-Pierre Ollivier M.D. "Does turbid-media time- and space-resolved reflectance depend on the different moments of the scattering phase function?", Proc. SPIE 3251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications II, (24 April 1998); https://doi.org/10.1117/12.306053

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KEYWORDS

Scattering

Reflectivity

Monte Carlo methods

Tissues

Picosecond phenomena

Laser scattering

Streak cameras

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