Optical scattering cross sections of biological tissue derived from a fractal scaling approximation

Hua Yang; Joseph M. Schmitt

doi:10.1117/12.280291

18 August 1997 Optical scattering cross sections of biological tissue derived from a fractal scaling approximation

Hua Yang, Joseph M. Schmitt

Proceedings Volume 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II; (1997) https://doi.org/10.1117/12.280291
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

Knowledge of the size distribution of scatterers in tissue is necessary for understanding the physical processes involved in light-tissue interaction. In this paper we propose and test a model of light scattering in tissue on a microscopic scale. We start from the hypothesis that tissue can be treated as fractal over a certain range of dimensions and proceed to derive a simple scaling law for particle sizes. To test the model, we use a number of sizes of randomly distributed spheres to approximate the fractal structure. Our results show that the fractal model yields credible estimates of the magnitudes of the optical scattering cross sections of tissue, as well as their angle and wavelength dependencies. The numerical data are used to estimate the sizes of the particles that contribute most to the total scattering and backscattering coefficients at a several wavelengths in the visible and near-infrared bands.

Citation Download Citation

Hua Yang and Joseph M. Schmitt "Optical scattering cross sections of biological tissue derived from a fractal scaling approximation", Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); https://doi.org/10.1117/12.280291

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