Time-frequency analysis of pediatric murmurs

Joseph S. Lombardo, Lisa A. Blodget, Ron S. Rosen, Amir Homayoon Najmi, W. Reid Thompson

Research output: Contribution to journalConference articlepeer-review

Abstract

Technology has provided many new tools to assist in the diagnosis of pathologic conditions of the heart. Echocardiography, Ultrafast CT (Cine-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 from 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.

Original languageEnglish (US)
Pages (from-to)177-187
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3253
DOIs
StatePublished - Dec 1 1998
EventBiomedical Sensing and Imaging Technologies - San Jose, CA, United States
Duration: Jan 26 1998Jan 27 1998

Keywords

  • Pediatric Murmurs
  • Signal Processing
  • Spectrogram
  • Time-Frequency Analysis
  • Wavelet Transforms
  • Wigner Distributions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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