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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 62, Iss. 6 — Jun. 1, 2008
  • pp: 671–676

Assessment of Near-Infrared Path Length in Fibrous Phantom and Muscle Tissue

Eugene Gussakovsky and Valery Kupriyanov

Applied Spectroscopy, Vol. 62, Issue 6, pp. 671-676 (2008)


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Abstract

The first derivative of the pseudo-absorption spectrum of a water-loaded cotton wool (water–CW) phantom, which mimics muscle tissues, was used to determine the light path length in the near-infrared (NIR) region. The light path length increased as the density of the turbid medium decreased. It is independent of both water content in the range of 75–85% (by weight) and the diffuse reflecting reference used to determine the pseudo-absorbance. The path length determination procedure was verified by measurements of diffuse reflectance in chicken breast tissue for which the path length of 1.8 mm (differential path length factor, DPF = 2.1) was found to be similar to the path length of NIR light of 1.5–2.2 mm (DPF = 1.8–2.6) in a water–CW phantom of density similar to chicken breast. We conclude that the NIR light path length can serve as a characteristic of muscle tissue density.

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Citation
Eugene Gussakovsky and Valery Kupriyanov, "Assessment of Near-Infrared Path Length in Fibrous Phantom and Muscle Tissue," Appl. Spectrosc. 62, 671-676 (2008)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-62-6-671

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