Digital viewer with quantitative coronary angiographic information

E. A. Yfantis, A. Popovich, C. A. Pinkerton, G. Than

Research output: Contribution to journalConference article


Visual estimation of coronary stenosis severity is inaccurate. Quantitative coronary angiographic methods based on the user, finding the center of the artery in the digitized image of the heart, and using the mouse to trace the stenosis and measure the degree of stenosis are more reliable than the visual estimation but not one hundred percent accurate. An intelligent algorithm is developed in this paper whereby we measure the coronary stenoses using cardiac x-ray angiographic digital information, then we repair the stenoses mathematically, using the algorithm described in this paper, the resulted information can be transmitted to a robotic unit to inflate the balloon and repair the stenoses accurately. The robotic unit is guided by the computer. The coronary artery is detected based on differences in the gray scale of the cardiac image. Based on the discontinuities of the first derivative and the twist vector along the artery boundaries we are able to quantify the number of stenoses along the artery, and the degree of its stenosis. Parametric splines tracing the coronary artery are developed. The purpose of the splines is to mathematically reconstruct the damaged section(s). The maximum distance between the reconstructed artery and the damaged part of the artery defines a mathematical measure of the degree of damage. The theory and algorithms developed in this research paper have been implemented and is one of the options included in our cineangiographic digital viewer. Some of the other options are to play the cardiac images at varying speeds, stop, feed-forward one image at a time, or ten images at a time, go backwards one image at a time, or ten images at a time, zoom into a section of the image, find all the edges, show the network of arteries of the heart disregarding all other tissue, animate the heart showing the arteries only.

Original languageEnglish
Pages (from-to)881-884
Number of pages4
JournalProceedings of the IEEE International Conference on Systems, Man and Cybernetics
Publication statusPublished - Dec 1 1998
EventProceedings of the 1998 IEEE International Conference on Systems, Man, and Cybernetics. Part 1 (of 5) - San Diego, CA, USA
Duration: Oct 11 1998Oct 14 1998


ASJC Scopus subject areas

  • Control and Systems Engineering
  • Hardware and Architecture

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