Surgery – Truss – Pad
Patent
1978-03-27
1981-04-28
Michell, Robert W.
Surgery
Truss
Pad
A61B 600
Patent
active
042639166
ABSTRACT:
A method and apparatus for angiography in which information contained within multiple serial images of contrast medium flowing through a blood vessel is combined to form a single image having improved vessel edge delineation. More specifically, a method is disclosed whereby a contrast medium opaque to X-rays is injected into a blood vessel distant from an artery section of interest, preferably injected into a vein, whereby the contrast medium is mixed with blood prior to its passing through the artery section. Multiple X-ray images are obtained as the contrast medium and blood mixture flows through the artery section. These multiple images are registered with respect to each other according to a landmark contained within the patient, the landmark having a predetermined relationship to the vessel of interest. The landmark could be a bone, catheter or any other material opaque to X-rays. Density measurements are made with respect to each corresponding image segment or element of the multiple images and are combined to synthesize a composite image. The synthesized image has an edge uncertainty equal to that of one of the individual images divided by the square root of the total number of images utilized.
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Blankenhorn David H.
Brooks Samuel H.
Crawford Donald W.
Selzer Robert H.
Jaworski Francis J.
Michell Robert W.
University of Southern California
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