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Developing and using fast shear wave elastography to quantify physiologically-relevant tendon forces.

S M Hassan Ahmadzadeh1, Xiao Chen2, Henrik Hagemann1

  • 1Department of Bioengineering, Imperial College London, London SW72AZ, UK.

Medical Engineering & Physics
|May 7, 2019
PubMed
Summary
This summary is machine-generated.

Shear Wave Elastography (SWE) offers a new non-invasive method to directly measure human tendon forces. This technique accurately quantifies physiological tendon loads, overcoming previous measurement challenges.

Keywords:
Musculoskeletal models’ validationShear wave elastographyShear wave speedTendon forcesTensile testing

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Area of Science:

  • Biomechanics
  • Medical Imaging
  • Musculoskeletal Research

Background:

  • Direct quantification of tendon forces is clinically valuable but challenging.
  • Current methods rely on indirect computational models or invasive force transducers.
  • Non-invasive direct measurement of tendon forces remains a significant hurdle.

Purpose of the Study:

  • To assess the feasibility of using Shear Wave Elastography (SWE) for non-invasively quantifying human tendon forces.
  • To establish the correlation between Shear Wave Speed (SWS) and tensile load in the patellar tendon.
  • To adapt SWE systems for imaging fast shear waves in tendons under physiological loading.

Main Methods:

  • Developed an experimental protocol combining SWE and conventional tensile testing.
  • Measured Shear Wave Speed (SWS) and tensile force in human patellar tendons.
  • Customized SWE system for high-velocity shear wave imaging.

Main Results:

  • Observed an increase in SWS from 10.8 m/s to 36.1 m/s with increasing tensile load (8 N to 935 N).
  • Demonstrated a strong linear correlation (r=0.99, p<0.01) between SWS and applied tensile load.
  • Successfully imaged fast shear waves in tendons under physiological loads.

Conclusions:

  • Shear Wave Elastography (SWE) shows potential as a non-invasive method for direct tendon force quantification.
  • SWE can accurately measure physiologically-relevant tendon forces.
  • Findings support SWE for validating forces estimated by computational models.