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Automated Method for
Doppler Echocardiography Analysis
 in Patients with
Atrial Fibrillation

 

Overview

Medical data from Doppler Echocardiography is currently extracted manually. The manual method is time consuming and subject to inter and intra-observer variability. An automated method that analyzes the Doppler signal is important for improving the analysis accuracy and can result in a powerful tool for noninvasive evaluation of cardiac haemodynamics, especially for patients with Atrial Fibrillation (AF). AF patients suffer from an irregular heart rate, and the shape of the Doppler signal obtained from them differs from beat to beat. This variability requires the use of multiple measures, and the averaging of them in order to produce an acceptable clinical data. In practice, the echo-technician selects a single beat as a representative/average beat, inserting additional errors and subjectivity into the analysis. The presented methodology works on signals from the Mitral Valve (MV) and the Tricuspid Valve (TV), and detects the envelope of the velocity vs. time function, the Maximal Velocity Envelope (MVE) using image processing tools. An ECG signal is used to achieve synchronization, for beat-by-beat analysis. Clinical parameters are extracted from the MVE and compared to expert-based extraction by an echo technician

For more information see slides

Detailed explanation as well as experimental results can be found, in Hebrew in the thesis

Publications

bulletShechner, M. Scheinowitz, M. S. Feinberg, H. Greenspan, "Automated method for Doppler Echocardiography Analysis in Patients with Atrial Fibrillation", The 7th Israeli Symposium on Computed-Aided Surgery (ISRACAS), Petach-Tikva, May 2004.[doc]
bulletShechner, M. Scheinowitz, M. S. Feinberg, H. Greenspan, "Image Analysis of Doppler Echocardiography for Patients with Atrial Fibrillation", International Symposium on Biomedical Imaging (ISBI), Washington DC, 2004. [pdf]
 

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Last updated: 01/07/08.