High variability in strain estimation errors when using a commercial ultrasound speckle tracking algorithm on tendon tissue

Acta Radiologica
Åsa FröbergAnton Arndt

Abstract

Ultrasound speckle tracking offers a non-invasive way of studying strain in the free Achilles tendon where no anatomical landmarks are available for tracking. This provides new possibilities for studying injury mechanisms during sport activity and the effects of shoes, orthotic devices, and rehabilitation protocols on tendon biomechanics. To investigate the feasibility of using a commercial ultrasound speckle tracking algorithm for assessing strain in tendon tissue. A polyvinyl alcohol (PVA) phantom, three porcine tendons, and a human Achilles tendon were mounted in a materials testing machine and loaded to 4% peak strain. Ultrasound long-axis cine-loops of the samples were recorded. Speckle tracking analysis of axial strain was performed using a commercial speckle tracking software. Estimated strain was then compared to reference strain known from the materials testing machine. Two frame rates and two region of interest (ROI) sizes were evaluated. Best agreement between estimated strain and reference strain was found in the PVA phantom (absolute error in peak strain: 0.21 ± 0.08%). The absolute error in peak strain varied between 0.72 ± 0.65% and 10.64 ± 3.40% in the different tendon samples. Strain determined with a frame rat...Continue Reading

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Citations

Dec 23, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Åsa FröbergAnton Arndt
Dec 18, 2020·Journal of Applied Physiology·Rene B SvenssonStijn Bogaerts

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