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Artifacts and Technical Restrictions in 2D Shear Wave Elastography.

Pierre Bouchet1, Jean-Luc Gennisson2, Andrea Podda1

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Summary
This summary is machine-generated.

This review details technical restrictions and artifacts in 2D shear wave elastography (2D-SWE), a quantitative stiffness assessment tool. Understanding these limitations is crucial for accurate and reproducible ultrasound elastography imaging.

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Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Biophysics

Background:

  • 2D shear wave elastography (2D-SWE) offers real-time quantitative assessment of tissue stiffness.
  • Elastography techniques have evolved, with 2D-SWE representing a significant advancement.
  • Accurate interpretation of 2D-SWE requires understanding its technical nuances.

Purpose of the Study:

  • To identify, describe, explain, and illustrate technical restrictions and artifacts in 2D-SWE.
  • To categorize these limitations based on acquisition technique, medium, and operator.
  • To emphasize the importance of knowledge for reliable elastography.

Main Methods:

  • Review of technical restrictions and artifacts encountered during 2D-SWE acquisition.
  • Categorization of artifacts by acquisition technique (e.g., B-mode entanglement, shadowing, mirroring).
  • Categorization by medium properties (e.g., liquid, anisotropy, depth) and operator factors (e.g., ROI settings, compression).

Main Results:

  • Identified artifacts include B-mode & SWE entanglement, posterior shadowing, mirrored elastograms, and vertical stripes.
  • Medium-related issues encompass liquid environments, "black hole phenomenon," pseudo-liquid lesions, anisotropy, and movement artifacts.
  • Operator-dependent factors include ROI compression, size, location, and acquisition time.

Conclusions:

  • A clear understanding of the physical principles is essential for radiologists using 2D-SWE.
  • Awareness of technical restrictions and artifacts is necessary for accurate stiffness assessment.
  • Proper application of 2D-SWE ensures the reliability and reproducibility of the technique.