Surgery – Truss – Pad
Patent
1989-08-10
1991-07-16
Cohen, Lee S.
Surgery
Truss
Pad
351206, 128745, A61B 502
Patent
active
050316320
ABSTRACT:
The instrumentation of sizes of a retinal vessel in the fundus is carried out by measuring continuously the sizes of the retinal vessel changing in accordance with heart beats at a site preset on the arteriole or the venule of the retinal vessel from images of the retinal vessel in the fundus continuously taken by a television camera or other photographic means; and comparing a periodical change of the sizes of the arteriole or venule of the retinal vessel. Static images are extracted at a given interval from fundus images photographed continuously by a television camera or recorded in a video tape recorder and converted into digital image which, in turn, is subjected to image processing. A length of the processed image data is measured at a given site of the image data fetched at a given timing from a storage, and a graph of rectangular coordinates is formed with a time coordinate versus a coordinate of measured values.
REFERENCES:
patent: 4166695 (1979-09-01), Hill et al.
patent: 4249825 (1981-02-01), Shapiro
patent: 4331132 (1982-05-01), Mukasa
patent: 4579430 (1986-04-01), Bille
patent: 4848897 (1989-07-01), Aizu et al.
Cohen Lee S.
Lacyk J. P.
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