Document Type

Article

Date

7-19-2009

Keywords

Raman; fluorescence; glucose; noninvasive; blood analysis; hematocrit

Disciplines

Chemistry

Description/Abstract

We report simultaneous observation of elastic scattering, fluorescence, and inelastic scattering from in vivo near-infrared probing of human skin. Careful control of the mechanical force needed to obtain reliable registration of in vivo tissue with an appropriate optical system allows reproducible observation of blood flow in capillary beds of human volar side fingertips. The time dependence of the elastically scattered light is highly correlated with that of the combined fluorescence and Raman scattered light. We interpret this in terms of turbidity (the impeding effect of red blood cells on optical propagation to and from the scattering centers) and the changes in the volume percentages of the tissues in the irradiated volume with normal homeostatic processes. By fitting to a model, these measurements may be used to determine volume fractions of plasma and RBCs.

Additional Information

Copyright 2009 Journal of Biomedical Optics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and Journal of Biomedical Optics.

The article may be found at http://biomedicaloptics.spiedigitallibrary.org/article.aspx?articleid=1103119

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Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.

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