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Proceedings Article

Optimum wavelengths for measurement of blood hemoglobin content and tissue hydration by NIR spectrophotometry

[+] Author Affiliations
Gitesh Kumar, Joseph M. Schmitt

Hong Kong Univ. of Science and Technology (Hong Kong China)

Proc. SPIE 2678, Optical Diagnostics of Living Cells and Biofluids, 442 (May 10, 1996); doi:10.1117/12.239533
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From Conference Volume 2678

  • Optical Diagnostics of Living Cells and Biofluids
  • Daniel L. Farkas; Robert C. Leif; Alexander V. Priezzhev; Toshimitsu Asakura; Bruce J. Tromberg
  • San Jose, CA | January 27, 1996

abstract

This paper examines non-invasive methods for absolute determination of the hemoglobin content of arterial blood and the water content of skin. Both methods are based on diffuse reflectance spectrophotometry in the near-infrared band (800 - 1600 nm). Separation of blood and background tissue spectra is accomplished by a technique similar to pulse oximetry, with the added feature that the set of measurement wavelengths is chosen to be sensitive to both hemoglobin and water concentration in the blood. Regressions performed on a simulated tissue spectra suggest that {1060, 1160, 1200 and 1320 nm} is an optimal set of wavelengths for measurement of tissue hydration and {1040, 1120, 1140 and 1200 nm} is an optimal set of wavelengths for measurement of hemoglobin content under typical measurement conditions. A simple in vitro tissue phantom whose optical properties can be altered in a controlled manner was developed to test the feasibility of the methods. Measurements were made with a custom-designed NIR spectrophotometer.

© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Gitesh Kumar and Joseph M. Schmitt
"Optimum wavelengths for measurement of blood hemoglobin content and tissue hydration by NIR spectrophotometry", Proc. SPIE 2678, Optical Diagnostics of Living Cells and Biofluids, 442 (May 10, 1996); doi:10.1117/12.239533; http://dx.doi.org/10.1117/12.239533


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