1 January 2008 In vivo determination of skin near-infrared optical properties using diffuse optical spectroscopy
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J. of Biomedical Optics, 13(1), 014016 (2008). doi:10.1117/1.2829772
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.
Sheng-Hao Tseng, Alexander Grant, Anthony Joseph Durkin, "In vivo determination of skin near-infrared optical properties using diffuse optical spectroscopy," Journal of Biomedical Optics 13(1), 014016 (1 January 2008). http://dx.doi.org/10.1117/1.2829772
JOURNAL ARTICLE
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KEYWORDS
Skin

Optical properties

Absorption

In vivo imaging

Scattering

Diffusion

Photons

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