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Proceedings Paper

Time-frequency analysis of pediatric murmurs
Author(s): Joseph S. Lombardo; Lisa A. Blodgett; Ron S. Rosen; Amir-Homayoon Najmi; W. Reid Thompson
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Paper Abstract

Technology has provided many new tools to assist in the diagnosis of pathologic conditions of the heart. Echocardiography, Ultrafast CT, and MRI are just a few. While these tools are a valuable resource, they are typically too expensive, large and complex in operation for use in rural, homecare, and physician's office settings. Recent advances in computer performance, miniaturization, and acoustic signal processing, have yielded new technologies that when applied to heart sounds can provide low cost screening for pathologic conditions. The short duration and transient nature of these signals requires processing techniques that provide high resolution in both time and frequency. Short-time Fourier transforms, Wigner distributions, and wavelet transforms have been applied to signals form hearts with various pathologic conditions. While no single technique provides the ideal solution, the combination of tools provides a good representation of the acoustic features of the pathologies selected.

Paper Details

Date Published: 1 May 1998
PDF: 11 pages
Proc. SPIE 3253, Biomedical Sensing and Imaging Technologies, (1 May 1998); doi: 10.1117/12.308027
Show Author Affiliations
Joseph S. Lombardo, Johns Hopkins Univ. (United States)
Lisa A. Blodgett, Johns Hopkins Univ. (United States)
Ron S. Rosen, Johns Hopkins Univ. School of Medicine (United States)
Amir-Homayoon Najmi, Johns Hopkins Univ. (United States)
W. Reid Thompson, Johns Hopkins Univ. School of Medicine (United States)

Published in SPIE Proceedings Vol. 3253:
Biomedical Sensing and Imaging Technologies
Robert A. Lieberman; Tuan Vo-Dinh, Editor(s)

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