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Muscle shear modulus measured with ultrasound shear‐wave elastography across a wide range of contraction intensity
Author(s) -
Yoshitake Yasuhide,
Takai Yohei,
Kanehisa Hiroaki,
Shinohara Minoru
Publication year - 2014
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24104
Subject(s) - shear modulus , muscle stiffness , elastography , materials science , ultrasound , shear (geology) , repeatability , biceps , elbow , stiffness , intraclass correlation , biomedical engineering , medicine , composite material , anatomy , mathematics , radiology , clinical psychology , psychometrics , statistics
: In this study we examine the repeatability of measuring muscle shear modulus using ultrasound shear‐wave elastography between trials and between days, and the association between shear modulus and contraction intensity over a wide range of intensities. Methods : Shear modulus of the biceps brachii was determined using ultrasound shear‐wave elastography during static elbow flexion (up to 60% of maximal contraction) in healthy young adults. Results : The correspondence of shear modulus was confirmed in phantoms between the manufacturer‐calibrated values and the shear‐wave elastography values. The intraclass correlation coefficient of muscle shear modulus was high: 0.978 between trials and 0.948 between days. Shear modulus increased linearly with elbow flexion torque across contraction intensity, and its slope was associated negatively with muscle strength. Conclusions : Muscle shear modulus measured with ultrasound shear‐wave elastography may be useful for inferring muscle stiffness across a wide range of contraction intensity. In addition, it has high repeatability between trials and between days. Muscle Nerve 50 : 103–113, 2014