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Ultrasound shear wave elastography of the anterior talofibular and calcaneofibular ligaments in healthy subjects

Authors
  • Gimber, Lana H.1
  • Daniel Latt, L2
  • Caruso, Chelsea3
  • Nuncio Zuniga, Andres A.4
  • Krupinski, Elizabeth A.5
  • Klauser, Andrea S.6
  • Taljanovic, Mihra S.3
  • 1 Department of VA – Menlo Park Campus, Uniformed Services University, National Teleradiology Program, United States , (United States)
  • 2 Department of Orthopaedic Surgery, The University of Arizona College of Medicine Banner-University Medical Center, United States , (United States)
  • 3 Department of Medical Imaging, The University of Arizona College of Medicine Banner-University Medical Center, United States , (United States)
  • 4 Department of Biomedical Engineering, The University of Arizona, United States , (United States)
  • 5 Department of Radiology & Imaging Sciences, Emory University, United States , (United States)
  • 6 Department of Radiology, Medical University Innsbruck, Austria , (Austria)
Type
Published Article
Journal
Journal of Ultrasonography
Publisher
Exeley Inc.
Publication Date
Jun 07, 2021
Volume
21
Issue
85
Identifiers
DOI: 10.15557/JoU.2021.0017
Source
Exeley
Keywords
Disciplines
  • Medicine
License
Green

Abstract

Aim of study: Most sprained lateral ankle ligaments heal uneventfully, but in some cases the ligament’s elastic function is not restored, leading to chronic ankle instability. Ultrasound shear wave elastography can be used to quantify the elasticity of musculoskeletal soft tissues; it may serve as a test of ankle ligament function during healing to potentially help differentiate normal from ineffective healing. The purpose of this study was to determine baseline shear wave velocity values for the lateral ankle ligaments in healthy male subjects, and to assess inter-observer reliability. Material and methods: Forty-six ankles in 23 healthy male subjects aged 20–40 years underwent shear wave elastography of the lateral ankle ligaments performed by two musculoskeletal radiologists. Each ligament was evaluated three times with the ankle relaxed by both examiners, and under stress by a single examiner. Mean shear wave velocity values were compared for each ligament by each examiner. Inter-observer agreement was evaluated. Results: The mean shear wave velocity at rest for the anterior talofibular ligament was 2.09 ± 0.3 (range 1.41–3.17); and for the calcaneofibular ligament 1.99 ± 0.36 (range 1.29–2.88). Good inter-observer agreement was found for the anterior talofibular ligament and calcaneofibular ligament shear wave velocity measurements with the ankle in resting position. There was a significant difference in mean shear wave velocities between rest and stressed conditions for both anterior talofibular ligament (2.09 m/s vs 3.21 m/s; p <0.001) and calcaneofibular ligament (1.99 m/s vs 3.42 m/s; p <0.0001). Conclusion: Shear wave elastography shows promise as a reproducible method to quantify ankle ligament stiffness. This study reveals that shear waves velocities of the normal lateral ankle ligaments increased with applied stress compared to the resting state.

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