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Related Experiment Videos

Ultrasonic elastography using sector scan imaging and a radial compression.

Rémi Souchon1, Lahbib Soualmi, Michel Bertrand

  • 1INSERM Unité 556, Lyon, France. souchon@lyon151.inserm.fr

Ultrasonics
|August 6, 2002
PubMed
Summary
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This study introduces a novel device for in vivo prostate elastography using radial compression. The method improves image quality by accounting for tissue displacement, aiding in better interpretation of elastograms.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Ultrasound Technology

Background:

  • Elastography estimates tissue strain using quasi-static compression, typically with a compression plate and linear array ultrasound.
  • Existing methods are unsuitable for in vivo imaging of organs like the prostate or blood vessels.
  • Strain decay with depth and strain concentrations are known phenomena in elastography.

Purpose of the Study:

  • To propose and investigate a novel device for acquiring in vivo elastograms of the prostate.
  • To understand the image formation process using ultrasonic sector scans for radial compression.
  • To develop methods for improving elastogram contrast and interpretation.

Main Methods:

  • A transrectal sector probe with an inflating balloon for radial compression was developed.

Related Experiment Videos

  • A 2D algorithm was employed to calculate elastograms, accounting for tangential tissue displacements.
  • Homogeneous and inclusion phantoms were used for experimental and simulated elastography, comparing results.

    • Main Results:

    • Both experimental and simulated elastograms showed strain decay with tissue depth.
    • Elastograms of phantoms with hard inclusions demonstrated strain concentrations.
    • A method to compensate for strain decay was proposed to enhance elastogram contrast.

    Conclusions:

    • The developed device and 2D algorithm enable in vivo prostate elastography.
    • Understanding radial compression imaging aids in interpreting elastograms.
    • The proposed strain decay compensation method is expected to improve elastogram quality and clinical utility.