Computerized Fluoroscopy Techniques for Intravenous Study of Cardiac Chamber Dynamics

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A computerized fluoroscopy system which was recently developed in our laboratories permits image contrast increases of 8–16 relative to conventional image intensifer fluoroscopy and permits study of canine and human ventricular wall motion using peripheral intravenous injections. Two time-dependent image subtraction algorithms are illustrated in connection with observation of artificially infarcted dog hearts. The first algorithm produces a display analogous to direct ventriculography using catheterization. The second displays regions of dyskinetic motion as anomalous image grey shades.

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