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The comet tail artifact.

M C Ziskin1, D I Thickman, N J Goldenberg

  • 1Department of Diagnostic Radiology, Temple University Medical Center, Philadelphia, PA 19140.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|January 1, 1982
PubMed
Summary
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Unexpected ultrasound findings in abdominal shotgun wounds were explained. A comet tail artifact, caused by reverberation, appeared distal to lead pellets, influenced by pellet characteristics.

Area of Science:

  • Medical imaging
  • Diagnostic ultrasound
  • Trauma imaging

Background:

  • Abdominal shotgun wounds present unique imaging challenges.
  • Echographic (ultrasound) examination is crucial for trauma assessment.
  • Unusual artifacts can complicate image interpretation.

Purpose of the Study:

  • To describe and explain an unexpected echographic appearance in abdominal shotgun wound patients.
  • To identify the nature of the "comet tail" artifact observed.
  • To investigate factors influencing the artifact's appearance.

Main Methods:

  • Case presentation of a patient with an abdominal shotgun wound.
  • B-scan ultrasound imaging was utilized.
  • Systematic analysis of the "comet tail" artifact and its relationship to lead pellets.

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Main Results:

  • A "comet tail" artifact, characterized by dense continuous echoes, was observed distal to lead pellets.
  • This artifact was identified as a reverberation artifact.
  • The appearance of the artifact was shown to be dependent on pellet size, shape, composition, and orientation.

Conclusions:

  • The "comet tail" echographic appearance in abdominal shotgun wounds is a reverberation artifact.
  • Understanding this artifact is essential for accurate ultrasound interpretation in trauma.
  • Pellet characteristics significantly influence the manifestation of this ultrasound artifact.