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Proceedings Paper

Computer Measurement And Representation Of The Heart In Two And Three Dimensions
Author(s): Daryl Rasmussen
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Paper Abstract

The Cardiovascular Research Laboratory at Ames Research Center is concerned with heart performance under conditions of stress associated with flight. Physiological studies are conducted on human and animal subjects using hemodynamic and angiographic techniques to assess cardiac function. Studies over the past few years have demonstrated the importance of size and shape changes in the cardiac ventricle in reflecting changes in physiological performance at rest or following interventions such as drugs, exercise, or surgery (1, 2). Experience has also shown that angio-cardiography is the only reliable means of measuring overall changes for the chamber under study. Although many other means are available for obtaining heart dimensional information, they usually provide only a single dimension such as a chamber diameter. This paper surveys our methods for accurate measurement and meaningful display of cardiac dimensions as obtained from fluoroscopy. The emphasis has been on scaling recorded images back to actual dimensions and displaying cardiac motion to assess functional changes. This has been accomplished by use of a low-cost but flexible ensemble of computer and video equipment which assists in (1) digitizing image outlines or points, (2) filing digitized images for later recall in any sequence, (3) correcting recorded images for distortion, (4) modeling heart geometry, (5) analyzing dimensional changes, and (6) displaying both heart geometry and results of analysis in a useful form.

Paper Details

Date Published: 11 March 1976
PDF: 6 pages
Proc. SPIE 0072, Cardiovascular Imaging and Image Processing: Theory and Practice, (11 March 1976); doi: 10.1117/12.954653
Show Author Affiliations
Daryl Rasmussen, NASA (United States)

Published in SPIE Proceedings Vol. 0072:
Cardiovascular Imaging and Image Processing: Theory and Practice
Donald C. Harrison; Harry A. Miller, Editor(s)

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