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muscle elastography

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https://www.readbyqxmd.com/read/29327169/passive-stiffness-of-monoarticular-lower-leg-muscles-is-influenced-by-knee-joint-angle
#1
Filiz Ateş, Ricardo J Andrade, Sandro R Freitas, François Hug, Lilian Lacourpaille, Raphael Gross, Can A Yucesoy, Antoine Nordez
PURPOSE: While several studies demonstrated the occurrence of intermuscular mechanical interactions, the physiological significance of these interactions remains a matter of debate. The purpose of this study was to quantify the localized changes in the shear modulus of the gastrocnemius lateralis (GL), monoarticular dorsi- and plantar-flexor muscles induced by a change in knee angle. METHOD: Participants underwent slow passive ankle rotations at the following two knee positions: knee flexed at 90° and knee fully extended...
January 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29313270/ultrasound-elastography-based-assessment-of-the-elasticity-of-the-supraspinatus-muscle-in-impingement-syndrome-does-elastography-has-any-diagnostic-value
#2
Adnan Demirel, Murat Baykara, Tuba Tülay Koca, Ejder Berk
Ultrasound elastography (UE) is a new ultrasound-based imaging technique that provides information about elasticity and stiffness of tissues. This cross-sectional study aimed to identify the diagnostic importance of UE in supraspinatus impingement syndrome. Forty-one subjects, aged 38-70 years, were included in the study. UE was used to determine the elasticity of the supraspinatus muscle. The strain ratio was calculated as the evaluation criteria to measure the elasticity of the muscle. High strain ratio indicated low elasticity...
January 8, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29301166/normal-range-of-patellar-tendon-elasticity-using-the-sharewave-elastography-technique-an-in-vivo-study-in-normal-volunteers
#3
Alexandre Hardy, Camille Rodaix, Claudio Vergari, Raphael Vialle
In-vivo investigation of tendon mechanical properties in healthy subjects using Shear Wave Elastography (SWE) techniques is a relatively new field of study. This work aims to evaluate the elastic properties of the patellar tendon in various knee range of flexion. Twenty healthy adult subjects were enrolled in the study. Shear wave speed (SWS) in the patellar tendon was measured in three different positions: Knee extended, knee semi-flexed (30°), and knee flexed (90°). Mean shear modulus was 50.9 +- 33.1 kPa in knee extension position, 137...
December 22, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29282062/supraspinatus-muscle-elasticity-measured-with-real-time-shear-wave-ultrasound-elastography-correlates-with-mri-spectroscopic-measured-amount-of-fatty-degeneration
#4
Fabian Gilbert, Detlef Klein, Andreas Max Weng, Herbert Köstler, Benedikt Schmitz, Jonas Schmalzl, Dirk Böhm
BACKGROUND: Fatty Degeneration (FD) of the rotator cuff muscles influences functional and anatomical outcome after rotator cuff repair. The MRI based estimation of fatty degeneration is the gold standard. There is some evidence that Ultrasound elastography (EUS) can detect local differences of tissue stiffness in muscles and tendons. Shear-wave elastography (SWE) was evaluated to determine the extent to which shear wave velocity was associated with measures of fatty degeneration. MRI-spectroscopic fat measurement was used as a reference to quantify the amount of fat in the muscle belly...
December 28, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29238405/the-effect-of-a-running-task-on-muscle-shear-elastic-modulus-of-posterior-lower-leg
#5
Shuhei Ohya, Masatoshi Nakamura, Takafumi Aoki, Daichi Suzuki, Takanori Kikumoto, Emi Nakamura, Wataru Ito, Ryo Hirabayashi, Tomoya Takabayashi, Mutsuaki Edama
Background: Medial tibial stress syndrome (MTSS) is one of the most common causes of exercise-related leg pain in runners. Because stopping training due to pain from MTSS could decrease the athlete's competitiveness, it is necessary to construct MTSS prevention and treatment programs. However, the effect of running, which is believed to cause MTSS, on shear elastic modulus of the posterior lower leg is unclear. Therefore, the purpose of this study was to investigate the effect of 30 min of running on shear elastic modulus of the posterior lower leg in healthy subjects...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/29238251/the-acute-effects-of-static-and-cyclic-stretching-on-muscle-stiffness-and-hardness-of-medial-gastrocnemius-muscle
#6
Noriaki Maeda, Yukio Urabe, Shogo Tsutsumi, Shogo Sakai, Hironori Fujishita, Toshiki Kobayashi, Makoto Asaeda, Kazuhiko Hirata, Yukio Mikami, Hiroaki Kimura
This study aimed to clarify the acute effects of static stretching (SS) and cyclic stretching (CS) on muscle stiffness and hardness of the medial gastrocnemius muscle (MG) by using ultrasonography, range of motion (ROM) of the ankle joint and ankle plantar flexor. Twenty healthy men participated in this study. Participants were randomly assigned to SS, CS and control conditions. Each session consisted of a standard 5-minute cycle warm-up, accompanied by one of the subsequent conditions in another day: (a) 2 minutes static stretching, (b) 2 minutes cyclic stretching, (c) control...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29224123/shear-wave-sonoelastography-of-skeletal-muscle-basic-principles-biomechanical-concepts-clinical-applications-and-future-perspectives
#7
REVIEW
Maud Creze, Antoine Nordez, Marc Soubeyrand, Laurence Rocher, Xavier Maître, Marie-France Bellin
Imaging plays an important role in the diagnosis and therapeutic response evaluation of muscular diseases. However, one important limitation is its incapacity to assess the in vivo biomechanical properties of the muscles. The emerging shear wave sonoelastography technique offers a quantifiable spatial representation of the viscoelastic characteristics of skeletal muscle. Elastography is a non-invasive tool used to analyze the physiologic and biomechanical properties of muscles in healthy and pathologic conditions...
December 9, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29212007/ultrahigh-resolution-optical-coherence-elastography-images-cellular-scale-stiffness-of-mouse-aorta
#8
Philip Wijesinghe, Niloufer J Johansen, Andrea Curatolo, David D Sampson, Ruth Ganss, Brendan F Kennedy
Cellular-scale imaging of the mechanical properties of tissue has helped to reveal the origins of disease; however, cellular-scale resolution is not readily achievable in intact tissue volumes. Here, we demonstrate volumetric imaging of Young's modulus using ultrahigh-resolution optical coherence elastography, and apply it to characterizing the stiffness of mouse aortas. We achieve isotropic resolution of better than 15 μm over a 1-mm lateral field of view through the entire depth of an intact aortic wall...
December 5, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/29197916/an-investigation-into-the-variability-between-different-shear-wave-elastography-systems-in-muscle
#9
Abdulrahman M Alfuraih, Philip O'Connor, Ai Lyn Tan, Elizabeth Hensor, Paul Emery, Richard J Wakefield
AIMS: The reliability and agreement between shear wave elastography (SWE) systems using different acquisition methods in muscles is not yet established. The objectives were to determine the reliability of a new SWE system on normal resting muscles using different acquisition methods and to compare its performance to an established state-of-the-art system.Material and methods: Small, medium and large ROI sizes in addition to longitudinal, oblique and transverse orientations over five different locations within the rectus femoris muscle were tested using the new system...
November 29, 2017: Medical Ultrasonography
https://www.readbyqxmd.com/read/29190853/contributions-of-hamstring-stiffness-to-straight-leg-raise-and-sit-and-reach-test-scores
#10
Naokazu Miyamoto, Kosuke Hirata, Noriko Kimura, Eri Miyamoto-Mikami
The passive straight-leg-raise (PSLR) and the sit-and-reach (SR) tests have been widely used to assess hamstring extensibility. However, it remains unclear to what extent hamstring stiffness (a measure of material properties) contributes to PSLR and SR test scores. Therefore, we aimed to clarify the relationship between hamstring stiffness and PSLR and SR scores using ultrasound shear wave elastography. Ninety-eight healthy subjects completed the study. Each subject completed PSLR testing, and classic and modified SR testing of the right leg...
November 30, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29188108/ultrahigh-resolution-optical-coherence-elastography-through-a-micro-endoscope-towards-in-vivo-imaging-of-cellular-scale-mechanics
#11
Qi Fang, Andrea Curatolo, Philip Wijesinghe, Yen Ling Yeow, Juliana Hamzah, Peter B Noble, Karol Karnowski, David D Sampson, Ruth Ganss, Jun Ki Kim, Woei M Lee, Brendan F Kennedy
In this paper, we describe a technique capable of visualizing mechanical properties at the cellular scale deep in living tissue, by incorporating a gradient-index (GRIN)-lens micro-endoscope into an ultrahigh-resolution optical coherence elastography system. The optical system, after the endoscope, has a lateral resolution of 1.6 µm and an axial resolution of 2.2 µm. Bessel beam illumination and Gaussian mode detection are used to provide an extended depth-of-field of 80 µm, which is a 4-fold improvement over a fully Gaussian beam case with the same lateral resolution...
November 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29183524/the-place-of-elastography-in-evaluating-the-efficacy-of-radiofrequency-ablation-of-thyroid-nodules
#12
Ufuk O Idiz, Erhan Aysan, Leyla Elmas, Seyma Yildiz, Huseyin Akbulut
The usage of radiofrequency ablation (RFA) therapy and elastography to treat thyroid nodules has been increasing recently. Elastography specifically measures the stiffness of tissue using ultrasonography (US). The aim of the present study was to evaluate the relationship between the elastography values of thyroid nodules and the efficacy of RFA therapy. Ultrasonography was performed on 49 patients who had a thyroid nodule with a diameter of 1 cm or greater before RFA therapy. The RFA was performed under local anesthesia, and elastography was used to measure the stiffness of the normal thyroid tissue, sternocleidomastoid muscle (SCM) and thyroid nodules three months after RFA...
November 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/29175615/characterization-of-tissue-stiffness-of-the-infraspinatus-erector-spinae-and-gastrocnemius-muscle-using-ultrasound-shear-wave-elastography-and-superficial-mechanical-deformation
#13
Joseph P Kelly, Shane L Koppenhaver, Lori A Michener, Laurel Proulx, Francis Bisagni, Joshua A Cleland
The aim of this study was to compare measurement methods of tissue stiffness using ultrasound shear wave elastography (SWE) and superficial mechanical deformation (MyotonPRO) in the infraspinatus, erector spinae, and gastrocnemius muscles. Thirty healthy volunteers were assessed during rest, 40% and 80% maximum voluntary isometric contraction (MVIC). Correlation of the two methods in the three muscle regions was significant (r = 0.23-0.71, p < .05), and strongest in the gastrocnemius. MyotonPRO reliability was excellent (ICC > 0...
November 11, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29174043/quantitative-evaluation-of-denervated-muscle-atrophy-with-shear-wave-ultrasound-elastography-and-a-comparison-with-the-histopathologic-parameters-in-an-animal-model
#14
Jing Wen, Yuexiang Wang, Wenli Jiang, Yukun Luo, Jiang Peng, Mingxue Chen, Xiaoguang Jing
This study explored the efficacy of shear wave ultrasound elastography (SWUE) for quantitative evaluation of denervated muscle atrophy in a rabbit model. The elastic modulus of the triceps surae muscle was measured with SWUE and compared with histopathologic parameters at baseline and at various post-denervation times (2, 4 and 8 wk) with 10 animals in each group. Our results revealed that the elastic modulus of denervated muscle was significantly lower at 2 wk but higher at 8 wk compared with that at the baseline (p <0...
November 21, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29163658/shear-wave-elastography-in-the-pronator-quadratus-muscle-following-distal-radial-fracture-fixation-a-feasibility-study-comparing-the-operated-versus-nonoperated-sides
#15
Christopher J Burke, James S Babb, Ronald S Adler
The aim of this study was to assess changes in shear wave velocity within the pronator quadratus muscle in patients following volar plate fixation for distal radial fractures compared to the contralateral nonoperated side. Shear wave velocity values were obtained in the short and long axis of the pronator quadratus muscle, which were analyzed separately. Patients were also stratified by age below or above 66 years. Statistical analysis was performed using paired sample Wilcoxon signed rank and t tests. Pearson and Spearman rank correlations were also used...
November 2017: Ultrasound: Journal of the British Medical Ultrasound Society
https://www.readbyqxmd.com/read/29147849/heterogeneity-of-passive-elastic-properties-within-the-quadriceps-femoris-muscle-tendon-unit
#16
Brooke K Coombes, Brandon Ziegenfuss, Michael David, Rohitha Badya, Wolbert van den Hoorn, François Hug, Kylie Tucker
PURPOSE: The purpose of this study was to compare regional elastic properties between anterior and posterior regions of the patellar tendon, and individual quadriceps muscles, over a range of knee flexion angles. METHODS: An isokinetic dynamometer passively positioned the non-dominant knee of 19 young, healthy participants, at 25°, 40°, 55°, 70° and 85° flexion. Shear wave velocity (SWV, an index of tissue elasticity) was measured using ultrasound shear wave elastography in a relaxed (passive) state, confirmed by electromyography...
November 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29139316/association-of-gastrocnemius-muscle-stiffness-with-passive-ankle-joint-stiffness-and-sex-related-difference-in-the-joint-stiffness
#17
Kintaro Chino, Hideyuki Takashi
Passive ankle joint stiffness is affected by all structures located within and over the joint, and is greater in men than in women. Localized muscle stiffness can be assessed by ultrasound shear wave elastography, and muscle architecture such as fascicle length and pennation angle can be measured by B-mode ultrasonography. Thus, we assessed localized muscle stiffness of the medial gastrocnemius (MG) with consideration of individual variability in the muscle architecture, and examined the association of the muscle stiffness with passive ankle joint stiffness and the sex-related difference in the joint stiffness...
November 15, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29137729/the-shear-wave-elastic-modulus-and-the-increased-nuclear-factor-kappa-b-nf-kb-p65-and-cyclooxygenase-2-cox-2-expression-in-the-area-of-myofascial-trigger-points-activated-in-a-rat-model-by-blunt-trauma-to-the-vastus-medialis
#18
Hengyong Lv, Zhen Li, Tiantian Hu, Yuexiang Wang, Jinpeng Wu, Yingxin Li
We aimed to elucidate the increased inflammatory cytokines expression such as nuclear factor kappa B (NF-kB/p65), cyclooxygenase-2 (COX-2), and voltage-gated calcium channels (VGCC) in the area of activated myofascial trigger points (MTrPs) in a rat model by blunt trauma to the vastus medialis and to evaluate the feasibility of a quantitative analysis of muscle elastic modulus using shear wave elastography (SWE). Twelve 7-week-old male SD rats were divided into normal (NM, n = 6) and model groups (MO, n = 6)...
November 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29075525/chest-wall-underappreciated-structure-in-sonography-part-i-examination-methodology-and-ultrasound-anatomy
#19
REVIEW
Andrzej Smereczyński, Katarzyna Kołaczyk, Elżbieta Bernatowicz
Chest wall ultrasound has been awarded little interest in the literature, with chest wall anatomy described only in limited extent. The objective of this study has been to discuss the methodology of chest wall ultrasound and the sonographic anatomy of the region to facilitate professional evaluation of this complex structure. The primarily used transducer is a 7-12 MHz linear one. A 3-5 MHz convex (curvilinear) transducer may also be helpful, especially in obese and very muscular patients. Doppler and panoramic imaging options are essential...
September 2017: Journal of Ultrasonography
https://www.readbyqxmd.com/read/29058612/skeletal-muscle-mechanics-energetics-and-plasticity
#20
REVIEW
Richard L Lieber, Thomas J Roberts, Silvia S Blemker, Sabrina S M Lee, Walter Herzog
The following papers by Richard Lieber (Skeletal Muscle as an Actuator), Thomas Roberts (Elastic Mechanisms and Muscle Function), Silvia Blemker (Skeletal Muscle has a Mind of its Own: a Computational Framework to Model the Complex Process of Muscle Adaptation) and Sabrina Lee (Muscle Properties of Spastic Muscle (Stroke and CP) are summaries of their representative contributions for the session on skeletal muscle mechanics, energetics and plasticity at the 2016 Biomechanics and Neural Control of Movement Conference (BANCOM 2016)...
October 23, 2017: Journal of Neuroengineering and Rehabilitation
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