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Related Experiment Video

Updated: May 6, 2026

Ex vivo Mechanical Loading of Tendon
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Ex vivo Mechanical Loading of Tendon

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Visualizing tendon elasticity in an ex vivo partial tear model.

Ryan J Dewall1, Jingfeng Jiang, John J Wilson

  • 1Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA; Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.

Ultrasound in Medicine & Biology
|November 12, 2013
PubMed
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Supersonic shear imaging (SSI) visualizes changes in tendon elasticity from partial tears. This method may improve assessment of tendon health by adding shear wave speed data to traditional imaging.

Area of Science:

  • Biomedical Engineering
  • Musculoskeletal Imaging
  • Orthopedic Research

Background:

  • Partial tendon tears significantly impact biomechanical function.
  • Accurate assessment of tendon elasticity is crucial for diagnosing and managing injuries.
  • Current imaging modalities may not fully capture regional elasticity changes in torn tendons.

Purpose of the Study:

  • To evaluate supersonic shear imaging (SSI) for visualizing regional elasticity changes in partially torn tendons.
  • To correlate shear wave speed alterations with tear severity in a porcine model.
  • To explore the potential of SSI in enhancing the assessment of tendon health.

Main Methods:

  • Thirty porcine digital flexor tendons underwent partial thickness tears (25%, 50%, 75%).
Keywords:
Partial tearShear wave imagingTendon ruptureUltrasound elastography

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  • Tendon elasticity was mapped using SSI at varying strain levels (0-2%) before and after injury.
  • Computational models were used to analyze regional strain distribution in relation to tear size.

    • Main Results:

    • Shear wave speed increased with strain in all regions of normal and torn tendons.
    • A significant decrease in deep surface shear wave speed was observed with increasing tear size (25-75%).
    • Computational models showed reduced deep surface strain correlating with larger tears.

    Conclusions:

    • Supersonic shear imaging successfully visualized regional shear wave speed in normal and partially torn tendons.
    • SSI has the potential to augment traditional morphologic assessments by providing quantitative elasticity data.
    • This technique may improve the evaluation of tendon health and partial tear severity.