Surgery – Diagnostic testing – Measuring or detecting nonradioactive constituent of body...
Patent
1996-08-28
1998-06-30
Bahr, Jennifer
Surgery
Diagnostic testing
Measuring or detecting nonradioactive constituent of body...
600323, 600473, A61B 300
Patent
active
057725888
ABSTRACT:
An apparatus and method are provided for measuring a scattering medium containing a light absorbing substance. The apparatus includes a light source; a photodetector; a gate voltage applying circuit for applying gate voltage pulses to the photodetector at a plurality of detection timings in order to generate the photodetector output light detection signals corresponding to the intensity of the light during periods of application of the pulses; and a signal processing unit for obtaining signal intensities during the periods and calculating internal information of the scattering medium based on the signal intensities.
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Time Resolved Reflectance and Transmittance for the Non-Invasive Measurement of Tissue Optical Properties, M.S.Patterson et al,Jun.15, 1989/vol.28,No.12/Applied Optics, pp. 2331-2336 (See Appln. p. 14).
Analytical Biochemistry 195, 330-351 (1991) Quantitation of Time-and Frequency-Resolved Optical Spectra for the Determination of Tissue Oxygenation. E.M.Sevick et al. pp. 330-351 (See also Appln. p. 19).
Miwa Mitsuharu
Tsuchiya Yutaka
Bahr Jennifer
Hamamatsu Photonics K.K.
Winakur Eric F.
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