scholarly journals Reliability of Shear Wave Elastography for the Assessment of Gastrocnemius Fascia Elasticity in Healthy Individual

2022 ◽  
Author(s):  
Jiping Zhou ◽  
Yuyi Lin ◽  
Jiehong Zhang ◽  
Xingxian Si’tu ◽  
Ji Wang ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Shear Wave ◽  
Healthy Individual ◽  
Shear Wave Elastography ◽  
Ankle Dorsiflexion ◽  
Medial Gastrocnemius ◽  
Deep Fascia ◽  
Minimal Detectable Change ◽  
Clear Understanding ◽  
Neutral Position

Abstract The mechanical properties of deep fascia (i.e. an index of stiffness) strongly affect the development of muscle pathologies, and muscular actions, such as compartment syndromes. Actually, a clear understanding of the mechanical characterization of muscle deep fascia still lacks. The present study focuses on examining the reliability of ultrasonic shear wave elastography device (USWE) in quantifying the shear modulus of gastrocnemius fascia in healthy individual and the device’s abilities to examine the shear modulus of gastrocnemius deep fascia during ankle dorsiflexion. Twenty-one healthy males participated in the study (age: 21.48±1.17 years). The shear modulus of the medial gastrocnemius fascia (MGF) and lateral gastrocnemius fascia (LGF) were quantified at different angles using USWE during passive lengthening. The operators took turns to measure each subject’s MGF and LGF over 1-hour period and by operator B with a 2-hour interval. In the intra-operator test, the same subjects participated at the same time 5 days later. The intra-rater [ Intra-class correlation coefficient (ICC) = 0.846-0.965)] and inter-rater (ICC = 0.877-0.961) reliabilities for measuring the shear modulus of the MGF and LGF were rated as both excellent, and the standard error in measurement (SEM) was 3.49 kPa, the minimal detectable change (MDC) was 9.68 kPa. Regardless of the ankle angle, the shear modulus of the LGF were significant greater than that of the MGF (p < 0.001). The significant increase in the shear modulus both of the MGF and LGF were observed at neutral position compared to the relaxed position. This results indicate that the USWE is a technique to assess the shear modulus of gastrocnemius fascia and detect its dynamic changes during ankle dorsiflexion. USWE can be used for biomechanical study and intervention experiments of deep fascia.

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

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

Effect of Rest Duration Between Static Stretching on Passive Stiffness of Medial Gastrocnemius Muscle In Vivo

2020 ◽  
Vol 29 (5) ◽  
pp. 578-582
Author(s):  
Masatoshi Nakamura ◽  
Shigeru Sato ◽  
Ryosuke Kiyono ◽  
Nobushige Takahashi ◽  
Tomoichi Yoshida
Keyword(s):  
Elastic Modulus ◽  
Shear Wave ◽  
Repeated Measures ◽  
Shear Wave Elastography ◽  
Muscle Stiffness ◽  
Medial Gastrocnemius ◽  
Static Stretching ◽  
Shear Elastic Modulus ◽  
Before And After

Context: In clinical and sports settings, static stretching (SS) is usually performed to increase range of motion (ROM) and decrease passive muscle stiffness. Recently, the shear elastic modulus was measured by ultrasonic shear wave elastography as an index of muscle stiffness. Previous studies reported that the shear elastic modulus measured by ultrasound shear wave elastography decreased after SS, and the effects of SS on shear elastic modulus were likely affected by rest duration between sets of SS. Objective: To investigate the acute effects of SS with different rest durations on ROM and shear elastic modulus of gastrocnemius and to clarify whether the rest duration between sets of SS decreases the shear elastic modulus. Design: A randomized, repeated-measures experimental design. Setting: University laboratory. Participants: Sixteen healthy males volunteered to participate in the study (age 21.3 [0.8] y; height 171.8 [5.1] cm; weight 63.1 [4.5] kg). Main Outcome Measures: Each participant underwent 3 different rest interval durations during SS (ie, long rest duration: 90 s; normal rest duration: 30 s; and short rest duration: 10 s). This SS technique was repeated 10 times, thus lasting a total of 300 seconds with different rest durations in each protocol. The dorsiflexion ROM and shear elastic modulus were measured before and after SS. Results: Our results revealed that dorsiflexion ROM and shear elastic modulus were changed after 300-second SS; however, no effects of the rest duration between sets of SS were observed. Conclusions: In terms of decreasing the shear elastic modulus, clinicians and coaches should not focus on the rest duration when SS intervention is performed.

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

scholarly journals Acute Effects of Dermal Suction on Passive Muscle and Joint Stiffness

Healthcare ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1483
Author(s):  
Shota Enomoto ◽  
Tomonari Shibutani ◽  
Yu Akihara ◽  
Miyuki Nakatani ◽  
Kazunori Yamada ◽  
...  
Keyword(s):  
Shear Wave ◽  
Plantar Flexion ◽  
Joint Stiffness ◽  
Medial Gastrocnemius ◽  
Neutral Position ◽  
Acute Effects ◽  
Passive Joint ◽  
Significant Difference ◽  
The Right ◽  
Passive Muscle

The aim of the present study was to examine the acute effects of dermal suction on the passive mechanical properties of specific muscles and joints. Dermal suction was applied to the calves of 24 subjects. Passive plantar flexion torque was measured with the right knee fully extended and the right ankle positioned at 20°, 10°, 0°, and −10° angles, where 0° represents the ankle neutral position, and positive values correspond to the plantar flexion angle. The shear wave velocity (SWV) (m/s) of the medial gastrocnemius was measured in the same position using ultrasound shear wave elastography. The relationship between the joint angle and passive torque at each 10° angle was defined as passive joint stiffness (Nm/°). Passive muscle and joint stiffness were measured immediately before and after the dermal suction protocol. When the ankle joint was positioned at 20° (r = 0.53, P = 0.006), 10° (r = 0.43, P = 0.030), and −10° (r = 0.60, P = 0.001), the SWV was significantly higher after dermal suction than that before dermal suction. Regarding joint stiffness, we found no significant difference between the pre- and post-dermal suction values (partial η2 = 0.093, P > 0.05). These findings suggest that dermal suction increases passive muscle stiffness and has a limited impact on passive joint stiffness.

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.

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 Regional Elastic Properties of the Achilles Tendon Is Heterogeneously Influenced by Individual Muscle of the Gastrocnemius

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Jiping Zhou ◽  
Jiafeng Yu ◽  
Chunlong Liu ◽  
Chunzhi Tang ◽  
Zhijie Zhang
Keyword(s):  
Elastic Modulus ◽  
Achilles Tendon ◽  
Elastic Properties ◽  
Gastrocnemius Muscle ◽  
High Reliability ◽  
Shear Wave Elastography ◽  
Minimal Detectable Change ◽  
Neutral Position ◽  
Individual Muscle ◽  
The Individual

Background. Anatomical studies and the mechanical property studies showed that there is a strong correlation between Achilles tendon (AT) elasticity and individual gastrocnemius muscle (the medial head of gastrocnemius (MG) and the lateral head of gastrocnemius (LG)) elasticity. Limited ankle dorsiflexion range of motion has been correlated with decreased flexibility of the MG/LG/AT complex. However, no studies have been conducted to examine the exact correlation between the Achilles tendon and the individual muscle of the gastrocnemius. Purposes. The purposes of the present study were (1) to evaluate intra- and interoperator reliabilities of elastic property measurements in the gastrocnemius muscle-Achilles tendon complex by using the shear wave elastography (SWE) and (2) to examine the correlation between the regional elastic properties of the AT and the individual muscle of the gastrocnemius. Methods. Twenty healthy subjects (mean age: 22.50 (3.02) years) were recruited in this study. The elastic properties of the AT and the individual muscle of the gastrocnemius were quantified using the SWE. Findings. The SWE has comparatively high reliability in quantifying the elastic properties of the muscle-tendon range from good to excellent. The intraoperator ICC of the gastrocnemius muscle-Achilles tendon complex was 0.77 to 0.95, while the interoperator ICC was 0.76 to 0.94. The minimal detectable change (MDC) of the muscle was 1.72 kPa, while the AT was 32.90 kPa. A significant correlation was found between the elastic modulus of AT and the elastic modulus of the MG (r=0.668 and p=0.001 at the relaxing position and r=0.481 and p=0.032 at the neutral position). Conclusions. The SWE has the potential to assess localized changes in muscle-tendon elastic properties, provide more intuitive relations between elastic properties of the muscle tendon and function, and evaluate the therapeutic effect of the muscle tendon. A significant correlation between the AT and the MG was found, and it may provide a new treatment idea (targeted to the tight muscle heads) for the clinical setting to treat subjects with AT disorders.

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