Noninvasive determination of the optical properties of two-layered turbid media from time-resolved reflectance measurements

Alwin Kienle; Thomas M. Glanzmann; Georges A. Wagnieres; Hubert van den Bergh

doi:10.1117/12.336945

15 January 1999 Noninvasive determination of the optical properties of two-layered turbid media from time-resolved reflectance measurements

Alwin Kienle, Thomas M. Glanzmann, Georges A. Wagnieres, Hubert van den Bergh

Author Affiliations +

Proceedings Volume 3570, Biomedical Sensors, Fibers, and Optical Delivery Systems; (1999) https://doi.org/10.1117/12.336945
Event: BiOS Europe '98, 1998, Stockholm, Sweden

Abstract

The influence of the adipose tissue thickness on near- infrared spectroscopy to monitor the hemodynamics in muscles in investigated. It is shown by calculation of the mean optical pathlength of two-layered turbid media that the validity of the modified Beer-Lambert law is reduced with increasing thickness of the first layer (fat), because the assumption, that the mean optical pathlength is constant, is not fulfilled. In order to avoid these problems we demonstrate that it is possible to derive the optical properties of both layers from time-resolved reflectance measurements using a solution of the two-layered diffusion equation if the thickness of the first layer is known.

Citation Download Citation

Alwin Kienle, Thomas M. Glanzmann, Georges A. Wagnieres, and Hubert van den Bergh "Noninvasive determination of the optical properties of two-layered turbid media from time-resolved reflectance measurements", Proc. SPIE 3570, Biomedical Sensors, Fibers, and Optical Delivery Systems, (15 January 1999); https://doi.org/10.1117/12.336945

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