scholarly journals Reliability of shear-wave elastography in assessing thoracolumbar fascia elasticity in healthy male

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Baizhen Chen ◽  
Hongzhou Zhao ◽  
Linrong Liao ◽  
Zhijie Zhang ◽  
Chunlong Liu
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Biomechanical Study ◽  
Upper Body ◽  
Healthy Male ◽  
Thoracolumbar Fascia ◽  
Minimum Detectable Change ◽  
Interclass Correlation ◽  
Male Subjects

AbstractThe objectives of this study were to examine the intra and inter-operator reliability of shear wave elastography (SWE) device in quantifying the shear modulus of thoracolumbar fascia (TLF) and the device’s abilities to examine the shear modulus of the TLF during upper body forward. Twenty healthy male subjects participated in this study (mean age: 18.4 ± 0.7 years). Two independent operators performed the shear modulus of TLF during upper body forward using SWE, and interclass correlation coefficient (ICC) and minimum detectable change (MDC) were calculated. The shear modulus of the TLF was quantified by operator A using SWE at upper body forward 60°. The intra-operator (ICC = 0.860–0.938) and inter-operator (ICC = 0.904–0.944) reliabilities for measuring the shear modulus of the TLF with the upper body forward 0° were rated as both excellent, and the MDC was 4.71 kPa. The TLF shear modulus of upper body forward 60°was increased 45.5% (L3) and 55.0% (L4) than that of upper body forward 0°. The results indicate that the SWE is a dependable tool to quantify the shear modulus of TLF and monitor its dynamic changes. Therefore, this device can be used for biomechanical study and intervention experiments of TLF.

Effects of body postures on the shear modulus of thoracolumbar fascia: a shear wave elastography study

2021 ◽  
Vol 59 (2) ◽  
pp. 383-390
Author(s):  
Baizhen Chen ◽  
Chunlong Liu ◽  
Ming Lin ◽  
Weixin Deng ◽  
Zhijie Zhang
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Body Postures ◽  
Thoracolumbar Fascia

scholarly journals Effect of Resonant Frequency Vibration on Delayed Onset Muscle Soreness and Resulting Stiffness as Measured by Shear-Wave Elastography

2021 ◽  
Vol 18 (15) ◽  
pp. 7853
Author(s):  
Garrett C. Jones ◽  
Jonathan D. Blotter ◽  
Cameron D. Smallwood ◽  
Dennis L. Eggett ◽  
Darryl J. Cochrane ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Shear Wave ◽  
Time Course ◽  
Biceps Brachii ◽  
Shear Wave Elastography ◽  
Upper Body ◽  
Maximum Voluntary Isometric Contraction ◽  
Post Exercise ◽  
Significant Difference ◽  
Pain Ratings

This study utilized resonant frequency vibration to the upper body to determine changes in pain, stiffness and isometric strength of the biceps brachii after eccentric damage. Thirty-one participants without recent resistance training were randomized into three groups: a Control (C) group and two eccentric exercise groups (No vibration (NV) and Vibration (V)). After muscle damage, participants in the V group received upper body vibration (UBV) therapy for 5 min on days 1–4. All participants completed a visual analog scale (VAS), maximum voluntary isometric contraction (MVIC), and shear wave elastography (SWE) of the bicep at baseline (pre-exercise), 24 h, 48 h, and 1-week post exercise. There was a significant difference between V and NV at 24 h for VAS (p = 0.0051), at 24 h and 1-week for MVIC (p = 0.0017 and p = 0.0016, respectively). There was a significant decrease in SWE for the V group from 24–48 h (p = 0.0003), while there was no significant change in the NV group (p = 0.9341). The use of UBV resonant vibration decreased MVIC decrement and reduced VAS pain ratings at 24 h post eccentric damage. SWE was strongly negatively correlated with MVIC and may function as a predictor of intrinsic muscle state in the time course of recovery of the biceps brachii.

Muscle shear modulus measured with ultrasound shear-wave elastography across a wide range of contraction intensity

2014 ◽  
Vol 50 (1) ◽  
pp. 103-113 ◽  
Author(s):  
Yasuhide Yoshitake ◽  
Yohei Takai ◽  
Hiroaki Kanehisa ◽  
Minoru Shinohara
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Wide Range

scholarly journals Resting Muscle Shear Modulus Measured With Ultrasound Shear-Wave Elastography as an Alternative Tool to Assess Muscle Fatigue in Humans

2019 ◽  
Vol 10 ◽  
Author(s):  
Julien Siracusa ◽  
Keyne Charlot ◽  
Alexandra Malgoyre ◽  
Sébastien Conort ◽  
Pierre-Emmanuel Tardo-Dino ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Muscle Fatigue ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Resting Muscle

Relationship between shear modulus and passive tension of the posterior shoulder capsule using ultrasound shear wave elastography: A cadaveric study

2020 ◽  
Vol 99 ◽  
pp. 109498 ◽  
Author(s):  
Naoya Iida ◽  
Keigo Taniguchi ◽  
Kota Watanabe ◽  
Hiroki Miyamoto ◽  
Tatsuya Taniguchi ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography ◽  
Cadaveric Study ◽  
Passive Tension ◽  
Posterior Shoulder

Abstract 139: Future Clinical Tools: Carotid Plaque Characterization via Shear Wave Elastography - A Phantom Study

Stroke ◽  
2015 ◽  
Vol 46 (suppl_1) ◽  
Author(s):  
Erik Widman ◽  
Elira Maksuti ◽  
Matthew Urban ◽  
Kenneth Caidahl ◽  
Matilda Larsson
Keyword(s):  
Shear Modulus ◽  
Mechanical Testing ◽  
Shear Wave ◽  
High Speed ◽  
Acoustic Radiation ◽  
Shear Wave Elastography ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Good Agreement

Introduction: Shear Wave Elastography (SWE) is a recently developed noninvasive method for elastography assessment using ultrasound. The technique consists of sending an acoustic radiation force into the tissue that in turn generates an orthogonal low frequency propagating shear wave. The shear wave propagation speed, which is calculated from B-mode images, is correlated to the tissues mechanical properties. Currently, SWE is primarily used in breast and liver to detect tumors easily missed with normal B-mode ultrasound. SWE could potentially aid in the characterization of plaques in the carotid artery, which is critical for the prevention of ischemic stroke. Methods: Six polyvinyl alcohol (PVA) phantoms were created with soft and hard plaque mimicking inclusions. The plaques were excited with acoustic radiation force and the shear wave was measured using high speed B-mode imaging. The data was post-processed with a custom in-house algorithm fitting a model of a Lamb wave propagating through a plate to the shear wave dispersion curve, which allowed the shear modulus to be estimated. The results were validated by measuring the phantom plaque shear modulus with mechanical testing. Results: SWE measured a mean shear modulus of 6 ± 1 kPa and 106 ± 17 kPa versus 3 kPa and 95 kPa measured by mechanical testing in the soft and hard plaques respectively. The results show good agreement between the shear modulus measured with SWE and mechanical testing. In this study simplified homogenous phantom plaque models were examined in a static experimental setup with results validated by mechanical testing. Algorithm improvements for measurements in a dynamic environment are being developed for a future in vivo pilot study. Conclusion: The results show good agreement between the shear modulus measured with SWE and mechanical testing and indicate the possibility for an in vivo application.

scholarly journals Validity of Measurement of Shear Modulus by Ultrasound Shear Wave Elastography in Human Pennate Muscle

PLoS ONE ◽  
2015 ◽  
Vol 10 (4) ◽  
pp. e0124311 ◽  
Author(s):  
Naokazu Miyamoto ◽  
Kosuke Hirata ◽  
Hiroaki Kanehisa ◽  
Yasuhide Yoshitake
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Shear Wave Elastography

scholarly journals In vivo assessment of the passive stretching response of the bi-compartmental human semitendinosus muscle using shear wave elastography

2021 ◽  
Author(s):  
Adam Kositsky ◽  
David J. Saxby ◽  
Kim J. Lesch ◽  
Rod S. Barrett ◽  
Heikki Kröger ◽  
...  
Keyword(s):  
Experimental Data ◽  
Shear Modulus ◽  
Shear Wave ◽  
Knee Flexion ◽  
Joint Angle ◽  
Shear Wave Elastography ◽  
Semitendinosus Muscle ◽  
Passive Stretching ◽  
Musculoskeletal Models

The semitendinosus muscle contains distinct proximal and distal compartments arranged anatomically in-series but separated by a tendinous inscription, with each compartment innervated by separate nerve branches. Although extensively investigated in other mammals, compartment-specific mechanical properties within the human semitendinosus have scarcely been assessed in vivo. Experimental data obtained during muscle-tendon unit stretching (e.g., slack angle) can also be used to validate and/or improve musculoskeletal model estimates of semitendinosus muscle force. The purpose of this study was to investigate the passive stretching response of proximal and distal humans semitendinosus compartments to distal joint extension. Using two-dimensional shear wave elastography, we bilaterally obtained shear moduli of both semitendinosus compartments from 14 prone-positioned individuals at ten knee flexion angles (from 90° to 0° [full extension] at 10° intervals). Passive muscle mechanical characteristics (slack angle, slack shear modulus, and the slope of the increase in shear modulus) were determined for each semitendinosus compartment by fitting a piecewise exponential model to the shear modulus-joint angle curves. We found no differences between compartments or legs for slack angle, slack shear modulus, or the slope of the increase in shear modulus. We also found the experimentally determined slack angle occurred at ~15-80° higher knee flexion angles compared to estimates from two commonly used musculoskeletal models, depending on participant and model used. Overall, these findings demonstrate that passive shear modulus-joint angle curves do not differ between proximal and distal human semitendinosus compartments, and provide experimental data to improve semitendinosus force estimates derived from musculoskeletal models.

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