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Related Experiment Videos

The needle tip echo.

S Bondestam1

  • 1Department of Radiology, Helsinki University, Finland.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|June 1, 1992
PubMed
Summary
This summary is machine-generated.

This study investigated needle tip echoes in ultrasound-guided biopsies. A beveled tip created two distinct echoes, with stylet insertion simplifying the pattern for clearer visualization.

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Area of Science:

  • Medical imaging
  • Ultrasound technology
  • Biopsy techniques

Background:

  • Sonographically guided needle aspiration biopsies are crucial for tissue diagnosis.
  • Understanding needle echogenicity improves procedural accuracy and safety.
  • A-mode ultrasound provides detailed information on echo patterns.

Purpose of the Study:

  • To analyze the echo characteristics of needle tips used in ultrasound-guided biopsies.
  • To investigate the effect of needle tip design and stylet insertion on echo generation.
  • To identify factors influencing echogenicity for enhanced visualization during biopsies.

Main Methods:

  • A-mode ultrasound was employed to study needle tip echoes.
  • Needle aspiration biopsy transducers were positioned in a water tank.

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  • Needles were aligned parallel to the ultrasound beam axis.

    • Main Results:

    • A beveled needle tip generated two echoes: a proximal and a more intense distal echo.
    • Stylet insertion eliminated the proximal echo, resulting in a single echo pattern.
    • Needle shaft roughening did not improve echogenicity.
    • Side ports on the needle shaft increased the number of echo peaks.

    Conclusions:

    • The beveled needle tip's geometry is the primary source of distinct echo patterns.
    • Stylet use simplifies the echo signature, potentially aiding in needle tip localization.
    • Modifications like side ports may alter echogenicity, requiring further investigation for clinical relevance.