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A Novel Application of Musculoskeletal Ultrasound Imaging

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A Single-Sensor Approach for Noninvasively Tracking Phase Velocity in Tendons during Dynamic Movement.

Dylan G Schmitz¹, Darryl G Thelen^1,2, Stephanie G Cone³

¹Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.

|January 23, 2024

Summary

This study introduces a novel single-sensor shear wave tensiometry method for measuring tendon force. This innovation enables more accessible and versatile noninvasive tendon force characterization.

Keywords:

dispersion shear wave tensiometry tendon mechanics wave propagation

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Area of Science:

Biomechanics
Biomedical Engineering
Musculoskeletal Research

Background:

Shear wave tensiometry noninvasively measures tendon force using wave speed.
Traditional methods require broadband excitation and dual sensors.
Accurate tendon force measurement is crucial for understanding dynamic activities and injury.

Purpose of the Study:

To develop and validate a new single-sensor shear wave tensiometry technique.
To track phase velocity using shaped excitations for tendon force assessment.
To explore the feasibility of smaller, more adaptable shear wave tensiometers.

Main Methods:

Utilized shaped excitations and single-sensor measurements to track phase velocity.
Applied the method to the Achilles tendon during dynamic activities.
Compared phase velocity modulation with traditional broadband excitation methods.

Main Results:

Observed phase velocity modulation consistent with broadband wave speed measures.
Confirmed a frequency-dependent phase velocity in the Achilles tendon, characteristic of soft tissues.
Demonstrated the potential for accurate, noninvasive tendon force estimation.

Conclusions:

The new single-sensor method effectively measures tendon phase velocity.
This approach enhances noninvasive tendon force characterization and allows for smaller device designs.
The technique broadens the applicability of shear wave tensiometry for various tendons and activities.