title: Computerized fluoroscopy techniques for intravenous study of cardiac chamber dynamics.
abstract: 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.
mesh_terms: D000818:Animals; D003201:Computers; D003287:Contrast Media / Q000008:administration & dosage*; D003327:Coronary Disease / Q000000981:diagnostic imaging; D004285:Dogs; D005471:Fluoroscopy / Q000379:methods*; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D007275:Injections, Intravenous; D013382:Subtraction Technique; D013679:Technology, Radiologic
chemical_list: D003287:Contrast Media