1. Measurement consistency of dynamic stretching muscle stiffness evaluated using shear wave elastography: comparison among different stretched levels and ROI sizes.
- Author
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Xiao Liu, Hong-Kui Yu, Shu-Ya Sheng, Si-Min Liang, Hao Lu, Li-Xian Gu, Pei Fu, Min Pan, Liu, Xiao, Yu, Hong-Kui, Sheng, Shu-Ya, Liang, Si-Min, Lu, Hao, Gu, Li-Xian, Fu, Pei, and Pan, Min
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SHEAR waves , *MODULUS of rigidity , *INTRACLASS correlation , *ELASTOGRAPHY , *MUSCLES , *ANKLE - Abstract
Aim: To investigate the reliability of quantitative analysis of dynamic stretching muscle stiffness using shear wave elas-tography (SWE), and to evaluate the influence of stretched levels and region of interest (ROI) sizes on the repeatability of SWE measurements.Materials and Methods: SWE videos of the gastrocnemius medius were collected during ankle movement from plantar flexion (PF) 40° to dorsiflexion (DF) 30°. Shear wave imageswere collected of ankle angles at PF 25°, 0°, DF 15°, and DF 30°, representing the slack status, mildly stretched level, moderately stretched level, and maximal stretched level of the gastrocnemius medius, respectively. ROI circles with diameters of 2 mm, 5 mm, and 8 mm were applied to measure the shear modulus. Intra-observer, and inter-observer repeatability of the measurements were compared among different stretched levels and ROI sizes.Results: Twenty-one healthy volunteers were enrolled. Muscle stiffness increased as the ankle DF increased. Intraclass correlation coefficients (ICCs) of intra-observer and inter-observer repeatability obtained for ROI sizes of 2 mm, 5 mm and 8 mm indicated good to excellent repeatability at all stretched levels.Conclusions: Shear wave elastography appeared to be a reliable tool to evaluate the dynamic stretching muscle stiffness with satisfactory repeatability at various stretched levels of gastrocnemius medius. Good to excellent repeatability was found using different ROI sizes. [ABSTRACT FROM AUTHOR]- Published
- 2021
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