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Proceedings Paper

Spectroscopic technique with wide range of wavelength information improves near-infrared spectroscopy
Author(s): Hideo Eda; Hiromichi Aoki; Shigeru Eura; Kazutoshi Ebe
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Paper Abstract

Near-infrared spectroscopy (NIRS) calculates hemoglobin parameters, such as oxygenated hemoglobin (oxyHb) and deoxygenated hemoglobin (deoxyHb) using the near-infrared light around the wavelength of 800nm. This is based on the modified-Lambert-Beer's law that changes in absorbance are proportional to changes in hemoglobin parameters. Many conventional measurement methods uses only a few wavelengths, however, in this research, basic examination of NIRS measurement was approached by acquiring wide range of wavelength information. Venous occlusion test was performed by using the blood pressure cuff around the upper arm. Pressure of 100mmHg was then applied for about 3 minutes. During the venous occlusion, the spectrum of the lower arm muscles was measured every 15 seconds, within the range of 600 to 1100nm. It was found that other wavelength bands hold information correlating to this venous occlusion task. Technique of improving the performance of NIRS measurement using the Spectroscopic Method is very important for Brain science.

Paper Details

Date Published: 12 February 2009
PDF: 8 pages
Proc. SPIE 7174, Optical Tomography and Spectroscopy of Tissue VIII, 717409 (12 February 2009); doi: 10.1117/12.809177
Show Author Affiliations
Hideo Eda, The Graduate School for the Creation of New Photonics Industries (Japan)
Photonics Innovations Co. Ltd. (Japan)
Hiromichi Aoki, The Graduate School for the Creation of New Photonics Industries (Japan)
Shigeru Eura, The Graduate School for the Creation of New Photonics Industries (Japan)
Kazutoshi Ebe, Toyota Central Research and Development Labs., Inc. (Japan)

Published in SPIE Proceedings Vol. 7174:
Optical Tomography and Spectroscopy of Tissue VIII
Bruce J. Tromberg; Arjun G. Yodh; Mamoru Tamura; Eva M. Sevick-Muraca; Robert R. Alfano, Editor(s)

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