Optical system for measuring metabolism in a body

Details Optical system for measuring metabolism in a body Optical system for measuring metabolism in a body

2005-06-14

2005-06-14

Winakur, Eric F. (Department: 3736)

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

C600S310000

Reexamination Certificate

active

06907279

ABSTRACT:
The invention provides optical technique for measuring metabolism in a living body that can further reduce an error in measurement even if distance between irradiation and detection is fixed. The living body is classified into measurement regions and different measuring wavelengths are set according to the classification. For example, the head is classified into four regions of a parietal region, a frontal region, a temporal region and an occipital region and a wavelength according to each tissue is set in a wavelength selecting system. In measurement, wavelengths according to each measurement region are selected by multiple wavelengths-light radiating means. Besides, for a region having large personal difference, premeasurement is made using plural combinations of wavelengths and wavelengths are selected using a calculated error in measurement as a criterion.

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Atsushi Maki, Yuichi Yamashita, Yoshitoshi Ito, Eiju Watanabe, Yoshiaki Mayanagi and Hideaki Koizumi, “Spatial and Temporal Analysis of Human Motor Activity Using Noninvasive NIR Topography”, Medical Physics, vol. 22, No. 12, Dec. 1995, pp. 1997-2005.
Yuichi Yamashita, Atsushi Maki and Hideaki Koizumi, “Wavelength Dependence of the Precision of Noninvasive Optical Measurement of Oxy-, Deoxy-, and Total-Hemoglobin Concentration”, Medical Physics, vol.. 28, No. 6, Jun. 2001, pp. 1108-1114.

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