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Mapping tendon stiffness: Two-dimensional versus point shear wave elastography.

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Summary
This summary is machine-generated.

This study compared point shear wave elastography (pSWE) and 2D shear wave elastography (2D-SWE) for assessing patellar tendon stiffness. Both methods showed excellent reliability, with 2D-SWE1 being faster and highly reliable for clinical use.

Keywords:
Acoustic radiation force impulse imagingMusculoskeletal ultrasoundPoint shear-wave elastographyTendon stiffnessTwo-dimensional shear wave elastography

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Area of Science:

  • Musculoskeletal Ultrasound
  • Medical Imaging Physics
  • Biomechanics

Background:

  • Patellar tendon (PT) stiffness assessment is crucial for diagnosing and managing tendinopathies.
  • Shear wave elastography (SWE) offers non-invasive quantitative stiffness measurement.
  • Comparability between point SWE (pSWE) and 2D SWE (2D-SWE) for PT assessment is not yet established.

Purpose of the Study:

  • To compare the diagnostic accuracy and reliability of pSWE and 2D-SWE in evaluating patellar tendon stiffness.
  • To assess intra- and interrater reliability for both pSWE and 2D-SWE techniques.
  • To evaluate and compare the measurement time required for pSWE and 2D-SWE.

Main Methods:

  • Forty healthy participants underwent B-mode ultrasound, Color Doppler ultrasound, and SWE (pSWE and 2D-SWE) of the patellar tendons.
  • Stiffness values (shear wave velocity) and measurement durations were recorded.
  • Intra- and interrater reliability were assessed by two investigators at two time points.

Main Results:

  • pSWE showed slightly higher stiffness values (4.02 ± 1.07 m/s) than 2D-SWE (3.82 ± 0.73 m/s) (p < 0.001).
  • 2D-SWE with one measurement (2D-SWE1) was significantly faster (47.20 ± 8.23 s) than pSWE (54.85 ± 8.34 s) (p < 0.001).
  • Both methods demonstrated excellent intra- and interrater reliability, with 2D-SWE1 yielding the highest ICC values.

Conclusions:

  • This is the first study comparing pSWE and 2D-SWE for patellar tendon stiffness assessment.
  • 2D-SWE, particularly 2D-SWE1, offers a reliable and time-efficient alternative for clinical musculoskeletal ultrasound.
  • Findings support the potential clinical utility of 2D-SWE in evaluating patellar tendon properties.