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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Illindala, U. Grimm, R.A. Morehead, A. Chandra, S. Greenberg, N.L. Thomas, J.D. |
| Copyright Year | 1996 |
| Description | Author affiliation: Dept. of Biomed. Eng., Case Western Reserve Univ., Cleveland, OH, USA (Illindala, U.) |
| Abstract | Spectral Doppler echocardiography has been accepted as the standard non-invasive diagnostic procedure for evaluating cardiac hemodynamics. However, clinical ability to draw conclusions from derived parameters is dependent on manual tracings of the Doppler flow patterns. These manual tracings are cumbersome and subjective, with very poor reproducibility. A new automated signal analysis and envelope detection method has been developed which can trace continuous as well as pulsed Doppler flows and offers reliable results while eliminating inter-observer variability. Audio Doppler signals are acquired from normal subjects simultaneous with routine video storage of the spectral velocity data. A signal processing technique highlighted by a method of flow generation using short time Fourier transforms provides a digital Doppler flow pattern. Customized software, using the modal velocity as a guide, has been developed for envelope detection and parameter estimation of such digital signals. These results have been compared with the observer traced and estimated parameters. |
| Starting Page | 189 |
| Ending Page | 192 |
| File Size | 433698 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780337107 |
| ISSN | 02766547 |
| DOI | 10.1109/CIC.1996.542505 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1996-09-08 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Envelope detectors Parameter estimation Echocardiography Hemodynamics Reproducibility of results Signal analysis Digital signal processing Video signal processing Signal generators Fourier transforms |
| Content Type | Text |
| Resource Type | Article |
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