Title :
Quadrature matched filters in image analysis of echocardiograms
Author :
Detmer, Paul R. ; Martin, Roy W. ; Bashein, Gerard
Author_Institution :
Washington Univ., Seattle, WA, USA
Abstract :
Twelve echocardiograms of the left ventricle are processed with a 2-D radial quadrature matched filter to identify endocardial border locations and orientations. Orientation angles of border edges, obtained from the quadrature output signals, exhibit gradual changes around the border. Using 3-pixel-wide edge models, a change in angle of less than 3° is found between 70.3% of the adjacent pairs of border points. The results show that gradual changes in angle are an excellent means for border identification
Keywords :
acoustic imaging; biomedical ultrasonics; cardiology; patient diagnosis; picture processing; 3-pixel-wide edge models; border identification; border orientation; echocardiograms; image analysis; left ventricle; medical diagnostic imaging; quadrature matched filters; Biological system modeling; Biomedical engineering; Detectors; Image analysis; Image edge detection; Image recognition; Matched filters; Pattern recognition; Pixel; Shape;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95802
