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Journal of Biomedical Optics

In vivo determination of skin near-infrared optical properties using diffuse optical spectroscopy
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Paper Abstract

We develop a superficial diffusing probe with a 3 mm source-detector separation that can be used in combination with diffuse optical spectroscopic (DOS) methods to noninvasively determine full-spectrum optical properties of superficial in vivo skin in the wavelength range from 650 to 1000 nm. This new probe uses a highly scattering layer to diffuse photons emitted from a collimated light source and relies on a two-layer diffusion model to determine tissue absorption coefficient μa and reduced scattering coefficient μs′. By employing the probe to measure two-layer phantoms that mimic the optical properties of skin, we demonstrate that the probe has an interrogation depth of 1 to 2 mm. We carry out SSFDPM (steady state frequency-domain photon migration) measurements using this new probe on the volar forearm and palm of 15 subjects, including five subjects of African descent, five Asians, and five Caucasians. The optical properties of in vivo skin determined using the superficial diffusing probe show considerable similarity to published optical properties of carefully prepared ex vivo epidermis+dermis.

Paper Details

Date Published: 1 January 2008
PDF: 7 pages
J. Biomed. Opt. 13(1) 014016 doi: 10.1117/1.2829772
Published in: Journal of Biomedical Optics Volume 13, Issue 1
Show Author Affiliations
Sheng-Hao Tseng, Univ. of California/Irvine (United States)
Alexander Grant, Univ. of California/Irvine (United States)
Anthony Joseph Durkin, Beckman Laser Institute and Medical Clinic (United States)

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