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Proceedings Paper

Densitometric Evaluation Of Myocardial Contrast Accumulation
Author(s): T. Sandor; S. Paulin; B. Sridhar
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Paper Abstract

Obstructive lesions in the coronary arterial tree may impair capillary or myocardial contrast accumulation, commonly known as myocardial blush. Densitometric assessment of the blush in cine-fluorography presupposes that the part of the cine-frame that represents the myocardium (or well defined part of it) can be retrieved on sequential frames. In the present operator-interactive approach, the blush is determined by digital subtraction. The procedure is the following: (1) A mask is selected by the operator before injection of the contrast medium at a selected instant within the heart cycle. (2) On one frame from the post-injection film series taken at the same phase of the heart cycle as the mask the operator may identify as many as 3 analyzing windows (polygons) which cover various areas on the myocardium. The computer then finds the same areas represented by the windows on each frame, computes the integral of the optical density distribution over them, and subtracts these values from the respective integrals on the mask. A plot of the subtracted data as a function of time gives the myocardial contrast turnover at selected sites.

Paper Details

Date Published: 27 December 1977
PDF: 4 pages
Proc. SPIE 0127, Application of Optical Instrumentation in Medicine VI, (27 December 1977); doi: 10.1117/12.955963
Show Author Affiliations
T. Sandor, Peter Bent Brigham Hospital and Beth Israel Hospital (United States)
S. Paulin, Peter Bent Brigham Hospital and Beth Israel Hospital (United States)
B. Sridhar, Peter Bent Brigham Hospital and Beth Israel Hospital (United States)

Published in SPIE Proceedings Vol. 0127:
Application of Optical Instrumentation in Medicine VI
Joel E. Gray; William R. Hendee, Editor(s)

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