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Related Experiment Videos

Recording and processing aneurysmal vibration signals in dogs.

M Sun1, L N Sekhar, R J Sclabassi

  • 1Department of Neurosurgery, University of Pittsburgh, PA.

Journal of Biomedical Engineering
|July 1, 1988
PubMed
Summary

A new computerized system detects canine aneurysms using acoustic signals. This technology differentiates aneurysm vibrations from normal arteries, aiding in diagnosis.

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Area of Science:

  • Veterinary Medicine
  • Biomedical Engineering
  • Acoustic Signal Processing

Background:

  • Aneurysms pose diagnostic challenges in veterinary medicine.
  • Non-invasive or minimally invasive detection methods are needed.
  • Acoustic phenomena associated with aneurysms have not been fully explored.

Purpose of the Study:

  • To develop and evaluate a computerized acoustic system for canine aneurysm detection.
  • To characterize the acoustic signals produced by aneurysms.
  • To assess the system's ability to distinguish aneurysm signals from normal arterial sounds.

Main Methods:

  • Development of a computerized acoustic aneurysm detection system.
  • Utilized two transducer types: a modified horn-coupled microphone and a microvascular intra-operative Doppler flowmeter.

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  • Recorded acoustic signals directly from aneurysms and parent arteries in dogs.
  • Processed signals using spectrograms and applied a noise-suppressing smoothing technique.

    • Main Results:

    • The developed system successfully recorded acoustic signals from canine aneurysms.
    • Aneurysm acoustic signals were found to be time-varying.
    • Stronger vibration signals were detected when proximal stenosis was present.
    • Distinct acoustic characteristics allowed easy differentiation between aneurysm and parent artery signals.

    Conclusions:

    • The computerized acoustic system shows promise for non-invasive canine aneurysm detection.
    • Acoustic signal analysis, particularly with spectrograms, can effectively characterize aneurysms.
    • The presence of stenosis influences the acoustic signature of aneurysms, potentially aiding diagnosis.