Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-02-10
1999-08-10
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600504, 600310, 356 41, A61B 500
Patent
active
059350768
ABSTRACT:
The method and apparatus for measuring the transmittance of blood within a retinal vessel detects the intensity of light reflected from illuminated portions of an eye, including the retinal vessel and background fundus, and adjusts the corresponding intensity signals to compensate for reflections from the retinal vessel. In particular, the transmittance measuring method and apparatus constructs an intensity profile function based upon the intensity signals. As a result, the intensity profile function approximates the intensity of light transmitted through the retinal vessel as a function of retinal vessel position. During the construction of the intensity profile function, the transmittance measuring method and apparatus can compensate for at least some of the reflections of light from the retinal vessel which occurred prior to propagation of the light through the retinal vessel, thereby increasing the accuracy with which the transmittance of blood within a retinal vessel is measured. In addition, the transmittance measuring method and apparatus can compensate for the finite point spread function of the light with which the eye is illuminated in order to further increase the resulting measurement accuracy.
REFERENCES:
patent: 3847483 (1974-11-01), Shaw et al.
patent: 4114604 (1978-09-01), Shaw et al.
patent: 4166695 (1979-09-01), Hill et al.
patent: 4253744 (1981-03-01), Sawa
patent: 4305398 (1981-12-01), Sawa
patent: 4346991 (1982-08-01), Gardner et al.
patent: 4350163 (1982-09-01), Ford, Jr. et al.
patent: 4485820 (1984-12-01), Flower
patent: 4579430 (1986-04-01), Bille
patent: 4694833 (1987-09-01), Hamaguri
patent: 4697593 (1987-10-01), Evans et al.
patent: 4824242 (1989-04-01), Frick et al.
patent: 4836207 (1989-06-01), Bursell et al.
patent: 4838683 (1989-06-01), Ichihashi et al.
patent: 4859056 (1989-08-01), Prosser et al.
patent: 4869254 (1989-09-01), Stone et al.
patent: 4877322 (1989-10-01), Hill
patent: 4907876 (1990-03-01), Suzuki et al.
patent: 4922919 (1990-05-01), Novack
patent: 4941741 (1990-07-01), Mizuta
patent: 4942877 (1990-07-01), Sakai et al.
patent: 5078136 (1992-01-01), Stone et al.
patent: 5119814 (1992-06-01), Minnich
patent: 5219400 (1993-06-01), Jacot et al.
patent: 5246002 (1993-09-01), Prosser
patent: 5285782 (1994-02-01), Prosser
patent: 5297554 (1994-03-01), Glynn et al.
patent: 5308919 (1994-05-01), Minnich
patent: 5318022 (1994-06-01), Taboada et al.
patent: 5377674 (1995-01-01), Kuestner
patent: 5433197 (1995-07-01), Stark
patent: 5515864 (1996-05-01), Zuckerman
patent: 5517987 (1996-05-01), Tsuchiya
patent: 5524617 (1996-06-01), Mannheimer
patent: 5640963 (1997-06-01), Tanaka
Hickam, John B., Frayser, Regina, Ross, Joseph C., A Study Of Retinal Venous Blood Oxygen Saturation In Human Subjects By Photographic Means, Circulation, vol. XXVII, Mar. 1963, pp. 375-384.
Van Assendelft, O.W., Spectrophotometry Of Haemoglobin Derivatives, Thomas, Springfield, IL 1970), pp. 55-59.
Laing, R.A., Danisch, L.A., Young, L.R., The Choroidal Eye Oximeter: An Instrument For Measuring Oxygen Saturation Of Choroidal Blood In Vivo, IEEE Transactions On Biomedical Engineering, vol. BME-222, No. 3, May 1975, pp. 183-195.
Cohen, Allen J., Laing, Ronald A., Multiple Scattering Analysis Of Retinal Blood Oximetry, IEEE Transactions On Biomedical Engineering, vol. BME-23, No. 5, Sep. 1976, pp. 391-399.
Roberts, D. Aaron, Analysis Of Vessel Absorption Profiles In Retinal Oximetry, Medical Physics, vol. 14, No. 1, Jan./Feb. 1987, pp. 124-130.
Delori, Francois C., Noninvasive Technique For Oximetry Of Blood In Retinal Vessels, Applied Optics, vol. 27, Mar. 15, 1988, pp. 1113-1125.
Chipman Russell A.
Denninghoff Kurt R.
Hillman Lloyd W.
Minnich Thomas E.
Smith Matthew H.
Lateef Marvin M.
Mantis Mercader Eleni
University of Alabama in Huntsville
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