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Rotation Elastogram Estimation Using Synthetic Transmit-aperture Technique: A Feasibility Study.

Lokesh B1, Bhaskara Rao Chintada1, Arun Kumar Thittai1

  • 11 Indian Institute of Technology Madras, Chennai, India.

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|January 17, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces Rotation Elastography (RE) to visualize benign breast lesion rotation. Employing the Synthetic Transmit Aperture (STA) technique significantly improves RE quality for better diagnostic information.

Keywords:
focused beamforminglateral displacementsquasi-static elastographyrotation elastogramsynthetic transmit aperturetissue-mimicking phantom

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Ultrasound Elastography

Background:

  • Benign breast lesions slip during quasi-static compression, unlike malignant ones.
  • Axial-shear strain elastography shows lesion bonding but indirect rotation.
  • Direct visualization of lesion rotation could improve diagnostic interpretation.

Purpose of the Study:

  • To investigate the feasibility of using the Synthetic Transmit Aperture (STA) technique to enhance lateral displacement estimation in ultrasound elastography.
  • To assess the impact of improved lateral displacement estimates on the quality of Rotation Elastograms (RE).
  • To evaluate the direct visualization of benign breast lesion rotation for diagnostic purposes.

Main Methods:

  • Adapted the Synthetic Transmit Aperture (STA) technique for ultrasound elastography.
  • Estimated the rotation tensor and generated Rotation Elastograms (RE).
  • Evaluated RE quality using contrast-to-noise ratio (CNR) in simulation and experimental studies.

Main Results:

  • The Synthetic Transmit Aperture (STA) technique improved lateral displacement estimation.
  • Rotation Elastograms (RE) showed contrast only for loosely bonded inclusions, indicating rotation.
  • The quality of Rotation Elastograms (RE) was considerably improved by employing the STA technique.

Conclusions:

  • The Synthetic Transmit Aperture (STA) technique is feasible for improving lateral displacement estimation in ultrasound elastography.
  • Rotation Elastography (RE) can directly visualize benign breast lesion rotation, correlating with slip boundary conditions.
  • Improved RE quality using STA offers a promising tool for enhanced breast lesion characterization.