NDLI: Comparison of binomial, ZAM and minimum cross-entropy time-frequency distributions of intracardiac heart sounds

Content Provider	IEEE Xplore Digital Library
Author	Bulgrin, J.R. Rubal, B.J. Posch, T.E. Moody, J.M.
Copyright Year	1994
Description	Author affiliation: Brooke Army Med. Center, Fort Sam Houston, TX, USA (Bulgrin, J.R.; Rubal, B.J.; Posch, T.E.; Moody, J.M.)
Abstract	One reason why automated heart sound analysis remains unfeasible may be the inadequacy of conventional spectral techniques in representing the nonstationary, multicomponent characteristics of phonocardiograms. This study compares several generalized time-frequency distributions (GTFDs) applied to intracardiac phonocardiograms (ICP) obtained at rest in six patients using catheter-mounted transducers. ICPs were bandpass filtered (50-500 Hz) and digitized at 4 kHz. The TFDs employed in this study were the binomial transform (BT), Zhao-Atlas-Marks (ZAM) distribution, minimum cross-entropy (MCE) distributions and the spectrogram. The BT and MCE representations in particular show improved concentration of ICP energy in time-frequency vs. the spectrogram. These findings suggest that several GTFDs may prove useful in the design of automated auscultation systems.
Starting Page	383
Ending Page	387
File Size	468686
Page Count	5
File Format	PDF
ISBN	0818664053
ISSN	10586393
DOI	10.1109/ACSSC.1994.471481
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time frequency analysis Heart Acoustic transducers Band pass filters Medical diagnostic imaging Piezoelectric transducers Aircraft Spectrogram Instruments Stethoscope
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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