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Proceedings Paper

Near-infrared spectroscopy with spectroscopic technique with wide range of wavelength information detects tissue oxygenation level clearly
Author(s): Hideo Eda; Hiromichi Aoki; Shigeru Eura; Kazutoshi Ebe
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Paper Abstract

Near-infrared spectroscopy (NIRS) is based on the modified-Lambert-Beer's law that changes in absorbance are proportional to changes in hemoglobin parameters. Majority of the conventional measurement methods uses only two or three wavelengths. In this research, basic examination of NIRS measurement was approached by acquiring wide range of wavelength information. Arterial occlusion task was performed by using the blood pressure cuff around the upper arm. Pressure of 200mmHg was then applied for about 3 minutes. During the arterial occlusion, the spectrum of the lower arm muscles was measured every 15 seconds, within the range of 600 to 1100nm. The secondary derivative spectrum was calculated from the measured spectrum. Arterial occlusion is a task which changes the oxygenation level of the tissue. The change can be regarded as the change of the spectrum form, not as the change of the baseline. Furthermore, it was found that other wavelength bands hold information correlating to this arterial occlusion task.

Paper Details

Date Published: 23 February 2010
PDF: 8 pages
Proc. SPIE 7557, Multimodal Biomedical Imaging V, 75570K (23 February 2010); doi: 10.1117/12.842372
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. 7557:
Multimodal Biomedical Imaging V
Fred S. Azar; Xavier Intes, Editor(s)

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