Determination of transport scattering coefficients of phantoms and biological tissue in vitro for wavelengths between 600 nm and 800 nm

U. Sukowski; B. Ebert; D. Nolte; H. Rinneberg

European Quantum Electronics Conference
Technical Digest Series (Optica Publishing Group, 1996),
paper QThA2

Determination of transport scattering coefficients of phantoms and biological tissue in vitro for wavelengths between 600 nm and 800 nm

U. Sukowski, B. Ebert, D. Nolte, and H. Rinneberg

European Quantum Electronics Conference 1996

Hamburg Germany
8–13 September 1996
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Lasers in Biology (QThA)

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U. Sukowski, B. Ebert, D. Nolte, and H. Rinneberg, "Determination of transport scattering coefficients of phantoms and biological tissue in vitro for wavelengths between 600 nm and 800 nm," in European Quantum Electronics Conference, Technical Digest Series (Optica Publishing Group, 1996), paper QThA2.

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Abstract

We have developed a method to determine the scattering (μ_s) coefficient and transport scattering coefficient (μ_s') of (homogeneous) diffusely scattering media from collimated (T_e) transmittance, diffuse (T_ed) transmittance and diffuse reflectance (R_ed). Using aqueous suspensions of monodisperse quartz glass spheres at various number densities, reflectances and transmittances were measured as a function of wavelength employing a two-integrating sphere setup and compared with theoretical predictions obtained from Monte Carlo calculations and Mie theory. Good agreement between experiment and theory has been achived. The intersection of T_ed and R_ed (s. Fig. 1) occurs at a value of d μ_s' ≅ 2.1 approximately independent of μ_a. This allows μ_s' to be determined without prior knowledge of. μ_a for the range 0.8 < T_ed / R_ed < 1.6.

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