Real time computerization of two-dimensional echocardiography☆

摘要: A computerized system was developed for real time acquisition, enhanced processing, analysis, and display of cross-sectional images the left ventricle derived by two-dimensional echocardiography (2DE). The new methodology couples a standard medical imaging computer to video output any current 2DE unit, uses 128 x or 64 matrix window stores 30 frames/sec digitized on magnetic disk. Computerized beat-to-beat frame-by-frame processing employs space-time smoothing automatic detection endocardial interfaces threshold second derivative techniques. Multiple views are displayed in with 256 levels gray color. used analyze graphically changes throughout cardiac cycle. In addition, regional wall motion thickness were analyzed 12 sectors individual cross-sections using standardized angular subdivision originating at center area indexed an external reference point. An algorithm correct interference definition from commonly trailing-to-leading edge more valid leading-to-leading outline technique. analysis spatial temporal variations contraction demonstrated several clinical experimental applications, including bicycle exercise testing, investigation acute myocardial infarction, assessment interventions. Initial evaluation indicates that digital acquisition data represents major advances toward quantitation ventricular function 2DE.