Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1996-07-11
1998-05-05
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250226, 250330, 25033902, 2503418, 128633, 36441313, A61B 500, G01N 2100
Patent
active
057477892
ABSTRACT:
The method of investigation of physiological components distribution in human body tissues includes optical illumination of the investigated area, recording of the spatial distribution of the intensity of the light reflected by the investigated area within a definite period of time through sequential time intervals, which are small compared to the time constant of the investigated process. The wavelength of the illuminating or recorded reflected radiation is chosen at one of the spectral intervals with a maximal steepness of the spectral changes in the physiological pigments absorption, this radiation being modulated by the frequency and the amplitude-modulated part of the reflected light thus appearing is recorded synchronously at the modulation frequency. In one aspect of the method, the investigated area is illuminated at one or several points and the reflected radiation is recorded at points shifted relative to the illuminated ones. An apparatus for investigation of distribution of physiological components in human body tissues contains an illuminator for the optical illumination of the investigated area with a control block, a detecting device for recording of the investigated area images, means for assignment of the radiation wavelength, a system of image formation, a video control device, a dynamic interface board for formation and accumulation at the video memory of the image processing system of the frame sequence.
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Cohen Jerry
Dynamics Imaging, Inc.
Erlich Jacob N.
Lee John R.
Westin Edward P.
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