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© IRL Press

An expert system for diagnosis of coronary artery stenosis based on 201TI scintigrams using the Dempster-Shafer theory of evidence

K.J. Cios , R.E. Freasier , L.S. Goodenday 1 and L.T. Andrews 1

University of ToledoToledo Toledo, OH 43606, USA
1Medical College of Ohio Toledo, OH 43606, USA

An expert system for the diagnosis of stenoses in the three main coronary arteries (left anterior descending, right coronary artery and circumflex) is described. First, the knowledge base domain—201Tl scintigrams-is explained and the method of preprocessing the original heart images is given. Next, the method of dealing with the uncertainties present both in the cardiologist-specified rules and the data using the Dempster-Shafer theory of evidence is explained. Finally, the constructed expert system and the results are discussed and several graphical examples are shown.

Received on December 15, 1989; accepted on April 15, 1990

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