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Diagnostic Value of Image Processing in Myocardial Scintigraphy

C.H.U. Henri Mondor, Creteil, France

Correspondence: For reprints contact: Docteur Luc Cinotti, Service de Médecine Nucléaire, C.H.U. Henri Mondor 51, Avenue du Maréchal de Lattre de Tassigny, 94010 Creteil-France.

ABSTRACT

The diagnostic value of stress myocardial analog scintigrams, and of five image-processing methods, was assessed by a decisional analysis in 96 patients undergoing coronary arteriography. The methods involved digitalization, nine-point binomial smoothing, background subtraction by linear interpolation, stationary filtering, and a combination of them. The difference between after-test probabilities of having the disease with a positive or a negative examination provided a discriminant index for different prevalences of the disease. Though the processing methods failed to improve the detection of a circumflex stenosis, the stationary filter significantly increased the diagnostic value for the detection of stenosis in a left anterior descending artery for a large range of prevalence, and in a right coronary artery at high prevalence. Thus, the filter seemed to provide a useful tool for enhancing the diagnostic value of myocardial scintigraphy.

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