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Cardiac left ventricular volume changes assessment by long axis echocardiographical image processing

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2 Author(s)
Setarehden, S.K. ; Signal Process. Div., Strathclyde Univ., Glasgow, UK ; Soraghan, J.J.

The authors describe a new fully automatic algorithm for left ventricular (LV) volume change measurement and assessment from both 2-chamber and 4-chamber apical views of echocardiographic images based on the American Society of Echocardiography (ASE) recommendations. The method identifies the left ventricular endocardium (LVE) in a `centre-based' approach. In this approach the left ventricular centre point (LVCP) is firstly approximated using a robust fuzzy based technique. The LVE edge points are then searched for on nonuniform distributed radial lines emanating from the LVCP using a multiresolution edge detection technique based on the global maximum of the wavelet transform (GMWT). The extracted edge points are then spatially/temporally processed to identify the final smooth boundary using cubic-B-splines. The extracted LVEs in a complete cardiac cycle, together with the standard approximating formula, are then used to compute the LV volume evolution in a cardiac cycle. Experiments with real two-dimensional echocardiographic images are presented. The accuracy of the GMWT edge detection technique, which is the heart of the system, is compared to the conventional Sobel and Laplace edge operators

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Vision, Image and Signal Processing, IEE Proceedings -  (Volume:145 ,  Issue: 3 )