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muscle elastography

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https://www.readbyqxmd.com/read/28934633/association-of-low-back-pain-with-muscle-stiffness-and-muscle-mass-of-the-lumbar-back-muscles-and-sagittal-spinal-alignment-in-young-and-middle-aged-medical-workers
#1
Mitsuhiro Masaki, Tomoki Aoyama, Takashi Murakami, Ko Yanase, Xiang Ji, Hiroshige Tateuchi, Noriaki Ichihashi
BACKGROUND: Muscle stiffness of the lumbar back muscles in low back pain (LBP) patients has not been clearly elucidated because quantitative assessment of the stiffness of individual muscles was conventionally difficult. This study aimed to examine the association of LBP with muscle stiffness assessed using ultrasonic shear wave elastography (SWE) and muscle mass of the lumbar back muscle, and spinal alignment in young and middle-aged medical workers. METHODS: The study comprised 23 asymptomatic medical workers [control (CTR) group] and 9 medical workers with LBP (LBP group)...
September 14, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28900767/quantitative-assessment-of-muscular-stiffness-in-children-with-cerebral-palsy-using-acoustic-radiation-force-impulse-arfi-ultrasound-elastography
#2
Meltem Ceyhan Bilgici, Tumay Bekci, Yasemin Ulus, Hamit Ozyurek, Omer Faruk Aydin, Leman Tomak, Mustafa Bekir Selcuk
PURPOSE: To evaluate the feasibility of quantitative analysis of muscle stiffness in the medial gastrocnemius muscle (GCM) by acoustic radiation force impulse (ARFI) ultrasound elastography in children with spastic cerebral palsy (CP). METHODS: Seventeen children with spastic CP and 25 healthy children participated in the study between the years 2016-2017. The medial GCM in the CP group was assessed using the Modified Ashworth Scale (MAS) by a physiatrist. ARFI was used to measure the shear-wave velocities (SWVs) of the medial GCM...
September 12, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28900566/transversus-abdominis-elasticity-during-various-exercises-a-shear-wave-ultrasound-elastography-study
#3
Kuniaki Hirayama, Ryota Akagi, Yuki Moniwa, Junichi Okada, Hideyuki Takahashi
BACKGROUND: Although the transversus abdominis (TrA) is considered to play a significant role in maintaining trunk stability, there is little information regarding the type of exercise that best facilitates the development of tension in the TrA. Muscle elasticity shows a strong association with muscle tension. Shear wave ultrasound elastography provides a means by which the tension of TrA can be noninvasively estimated, by quantifying it's elasticity. PURPOSE: The purpose of this study was to examine the TrA elasticity during several exercises as measured by shear wave ultrasound elastography, and to determine which of the studied exercises demonstrated the greatest tension...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28885211/postoperative-control-of-functional-muscle-flaps-for-facial-palsy-reconstruction-ultrasound-guided-tissue-monitoring-using-contrast-enhanced-ultrasound-ceus-and-ultrasound-elastography
#4
A Kehrer, V Mandlik, C Taeger, S Geis, L Prantl, E M Jung
BACKGROUND AND OBJECTIVES: Facial paralysis causes excruciating impairments including facial asymmetry, limited eye closure, oral incontinence and social dysfunction. Modern plastic surgical reconstructions render favorable results with well-perfused dynamic muscle flaps. Post-operative tissue monitoring is a critical determinant for success. Contrast-enhanced Ultrasound (CEUS) and elastography have proven superior properties to evaluate tissue perfusion in various organs. We evaluated their role for functional muscle flaps positioned at the sub-skin level in facial palsy patients...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28866442/passive-material-properties-of-stroke-impaired-plantarflexor-and-dorsiflexor-muscles
#5
Kristen L Jakubowski, Ada Terman, Ricardo V C Santana, Sabrina S M Lee
BACKGROUND: Following a stroke, intrinsic muscle properties such as stiffness may be altered, which is accompanied by increased spasticity and contractures. Previously, quantification of muscle stiffness has been based off of indirect measurements. Using shear wave ultrasound elastography, direct measurements of muscle material properties can be made. METHODS: Our aim was to evaluate material properties, specifically passive stiffness, using shear wave ultrasound elastography across a range of muscle lengths, in the medial gastrocnemius and the tibialis anterior in chronic stroke survivors...
August 24, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28841869/measurements-of-the-trapezius-and-erector-spinae-muscles-using-virtual-touch-imaging-quantification-ultrasound-elastography-a-cross-section-study
#6
Anne Heizelmann, Sümeyra Tasdemir, Julian Schmidberger, Tilmann Gräter, Wolfgang Kratzer, Beate Grüner
BACKGROUND: This study uses virtual touch imaging quantification (VTIQ) technology for the first time to conduct measurements of the trapezius and erector spinae muscles in a large study population. The significance of various influencing factors, such as age and sex, are also examined. METHOD: The study population comprised 278 subjects. The Siemens Acuson S3000 and VTIQ technology were used for measurements of the trapezius and erector spinae muscles (Siemens Healthcare, Erlangen, Germany)...
August 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28829699/association-between-years-of-competition-and-shoulder-function-in-collegiate-swimmers
#7
Jack D Dischler, Timothy G Baumer, Evan Finkelstein, Daniel S Siegal, Michael J Bey
BACKGROUND: Shoulder injuries are common among competitive swimmers, and the progression of shoulder pathology is not well understood. The objective of this study was to assess the extent to which years of competitive swim training were associated with physical properties of the supraspinatus muscle and tendon, shoulder strength, and self-reported assessments of shoulder pain and function. HYPOTHESIS: Increasing years of competition will be associated with declining physical properties of the supraspinatus muscle/tendon and declining self-reported assessments of pain and function...
August 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28791501/skeletal-muscle-mass-to-visceral-fat-area-ratio-is-an-important-determinant-affecting-hepatic-conditions-of-non-alcoholic-fatty-liver-disease
#8
Takashi Shida, Kentaro Akiyama, Sechang Oh, Akemi Sawai, Tomonori Isobe, Yoshikazu Okamoto, Kazunori Ishige, Yuji Mizokami, Kenji Yamagata, Kojiro Onizawa, Hironori Tanaka, Hiroko Iijima, Junichi Shoda
BACKGROUND: Not only obesity but also sarcopenia is associated with NAFLD. The influence of altered body composition on the pathophysiology of NAFLD has not been fully elucidated. The aim of this study is to determine whether skeletal muscle mass to visceral fat area ratio (SV ratio) affects NAFLD pathophysiology. METHODS: A total of 472 subjects were enrolled. The association between SV ratio and NAFLD pathophysiological factors was assessed in a cross-sectional nature by stratification analysis...
August 8, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28780603/early-detection-of-exercise-induced-muscle-damage-using-elastography
#9
Lilian Lacourpaille, Antoine Nordez, François Hug, Valentin Doguet, Ricardo Andrade, Gaël Guilhem
PURPOSE: This study aimed to determine whether an increase in muscle shear modulus measured 30 min after eccentric exercise (30 min) reflects the magnitude of force deficit measured 48-h post-exercise (48 H). METHODS: A total of 53 healthy participants were distributed in five groups. Four groups performed either repeated eccentric elbow flexions or knee extensions at either a low or high load. A fifth group performed repeated concentric elbow flexions (control load)...
August 5, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28751493/the-nervous-system-does-not-compensate-for-an-acute-change-in-the-balance-of-passive-force-between-synergist-muscles
#10
Lilian Lacourpaille, Antoine Nordez, François Hug
It is unclear how muscle activation strategies adapt to differential acute changes in the biomechanical characteristics between synergist muscles. This issue is fundamental to understanding the control of almost every joint in the body. The aim of this human experiment was to determine whether the relative activation of the heads of the triceps surae (Gastrocnemius medialis [GM], Gastrocnemius lateralis [GL] and Soleus [SOL]) compensates for differential changes in passive force between these muscles. Twenty-four participants performed isometric ankle plantarflexion at 20N...
July 27, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28740756/sonographic-evaluation-of-the-immediate-effects-of-eccentric-heel-drop-exercise-on-achilles-tendon-and-gastrocnemius-muscle-stiffness-using-shear-wave-elastography
#11
Wilson K C Leung, K L Chu, Christopher Lai
BACKGROUND: Mechanical loading is crucial for muscle and tendon tissue remodeling. Eccentric heel drop exercise has been proven to be effective in the management of Achilles tendinopathy, yet its induced change in the mechanical property (i.e., stiffness) of the Achilles tendon (AT), medial and lateral gastrocnemius muscles (MG and LG) was unknown. Given that shear wave elastography has emerged as a powerful tool in assessing soft tissue stiffness with promising intra- and inter-operator reliability, the objective of this study was hence to characterize the stiffness of the AT, MG and LG in response to an acute bout of eccentric heel drop exercise...
2017: PeerJ
https://www.readbyqxmd.com/read/28684232/acute-effect-and-time-course-of-extension-and-internal-rotation-stretching-of-the-shoulder-on-infraspinatus-muscle-hardness
#12
Ken Kusano, Satoru Nishishita, Masatoshi Nakamura, Hiroki Tanaka, Jun Umehara, Noriaki Ichihashi
BACKGROUND: A decrease in flexibility of the infraspinatus muscle causes limitations in the range of shoulder motion. Static stretching (SS) is a useful method to improve muscle flexibility and joint mobility. Previous researchers investigated effective stretching methods for the infraspinatus. However, few researchers investigated the acute effect of SS on the infraspinatus muscle's flexibility. In addition, the minimum SS time required to increase the infraspinatus muscle's flexibility remains unclear...
July 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28680900/semitendinosus-tendon-for-acl-reconstruction-regrowth-and-mechanical-property-recovery
#13
Stephen M Suydam, Daniel H Cortes, Michael J Axe, Lynn Snyder-Mackler, Thomas S Buchanan
BACKGROUND: Semitendinosus/gracilis (STG) tendon autograft has been used effectively for restoring knee stability after anterior cruciate ligament (ACL) rupture. Though ACL reconstruction with STG autograft is an effective surgical technique for return to sports, short-term hamstring strength asymmetries exist after surgery. Although imaging evidence has demonstrated regrowth and reorganization of the semitendinosus (ST) tendon, no studies show whether the regrowth is associated with residual muscle function...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28669751/finite-element-analysis-to-investigate-variability-of-mr-elastography-in-the-human-thigh
#14
L Hollis, E Barnhill, M Perrins, P Kennedy, N Conlisk, C Brown, P R Hoskins, P Pankaj, N Roberts
PURPOSE: To develop finite element analysis (FEA) of magnetic resonance elastography (MRE) in the human thigh and investigate inter-individual variability of measurement of muscle mechanical properties. METHODS: Segmentation was performed on MRI datasets of the human thigh from 5 individuals and FEA models consisting of 12 muscles and surrounding tissue created. The same material properties were applied to each tissue type and a previously developed transient FEA method of simulating MRE using Abaqus was performed at 4 frequencies...
June 29, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28657192/effects-of-age-and-pathology-on-shear-wave-speed-of-the-human-rotator-cuff
#15
Timothy G Baumer, Jack Dischler, Leah Davis, Yassin Labyed, Daniel S Siegal, Marnix van Holsbeeck, Vasilios Moutzouros, Michael J Bey
Rotator cuff tears are common and often repaired surgically, but post-operative repair tissue healing, and shoulder function can be unpredictable. Tear chronicity is believed to influence clinical outcomes, but conventional clinical approaches for assessing tear chronicity are subjective. Shear wave elastography (SWE) is a promising technique for assessing soft tissue via estimates of shear wave speed (SWS), but this technique has not been used extensively on the rotator cuff. Specifically, the effects of age and pathology on rotator cuff SWS are not well known...
June 28, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28607322/assessment-of-the-mechanical-properties-of-the-muscle-tendon-unit-by-supersonic-shear-wave-imaging-elastography-a-review
#16
Kelly Mônica Marinho E Lima, José Francisco Silva Costa Júnior, Wagner Coelho de Albuquerque Pereira, Liliam Fernandes de Oliveira
This review aimed to describe the state of the art in muscle-tendon unit (MTU) assessment by supersonic shear wave imaging (SSI) elastography in states of muscle contraction and stretching, during aging, and in response to injury and therapeutic interventions. A consensus exists that MTU elasticity increases during passive stretching or contraction, and decreases after static stretching, electrostimulation, massage, and dry needling. There is currently no agreement regarding changes in the MTU due to aging and injury...
April 15, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28600654/functions-of-the-subregions-of-the-infraspinatus-during-lateral-rotation
#17
Yoshiki Kuwahara, Takuma Yuri, Hiromi Fujii, Yoshiro Kiyoshige
PURPOSE: Although recent morphological studies have revealed that the infraspinatus muscle is subdivided, the functions of the subregions remain unknown. The aim of this study is to investigate the functions of the infraspinatus subregions during lateral rotation using real-time tissue elastography (RTE). METHODS: Ten young male volunteers participated in the study. In addition to the infraspinatus subregions, the teres minor and two of six subregions of the supraspinatus determined by Kim were examined...
June 9, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28593004/influence-of-subjects-characteristics-and-technical-variables-on-muscle-stiffness-measured-by-shear-wave-elastosonography
#18
Chandra Bortolotto, Luca Lungarotti, Ilaria Fiorina, Michela Zacchino, Ferdinando Draghi, Fabrizio Calliada
PURPOSE: The aim of this study is to quantitatively assess lower limbs muscle elasticity in a court of healthy subjects and to evaluate the influence of technical variables (e.g., diameter of the ROI-region of interest) and examined subjects' characteristics (e.g., sex, levels of physical activity, side evaluated) on muscle stiffness. MATERIALS AND METHODS: 54 healthy subjects (48 men, 6 women) were evaluated for a total of 108 lower limbs. Shear wave elastography was performed with a multifrequency linear probe (15-4 MHz)...
June 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28586712/ultrasound-shear-wave-elastography-in-the-assessment-of-passive-biceps-brachii-muscle-stiffness-influences-of-sex-and-elbow-position
#19
Johnson Chen, Michael O'Dell, Wen He, Li-Juan Du, Pai-Chi Li, Jing Gao
OBJECTIVE: To assess differences in biceps brachii muscle (BBM) stiffness as evaluated by ultrasound shear wave elastography (SWE). METHODS: The passive stiffness of the BBM was quantified with shear wave velocity (SWV) measurements obtained from 10 healthy volunteers (5 men and 5 women, mean age 50years, age range 42-63 years) with the elbow at full extension and 30° flexion in this IRB-approved study. Potential differences between two depths within the muscle, two elbow positions, the two arms, and sexes were assessed by using two-tailed t-test...
May 31, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28561920/2d-and-shearwave-elastography-ultrasound-a-reliable-method-to-analyse-spastic-muscles
#20
Laure Mathevon, F Michel, S Aubry, R Testa, T Lapole, L F Arnaudeau, B Fernandez, B Parratte, P Calmels
Introduction-Few data exist on the feasibility and reliability of measuring muscular atrophy in two dimensions (2D) by ultrasonography (US) and elasticity using ShearWave Elastography (SWE) in spastic muscles. Methods-Fourteen patients with chronic stroke took part in two inter-session reliability experiments performed with a one week interval between sessions. Pennation angle (PA), muscle thickness (MT), and shear elastic modulus (µ) were measured in spastic gastrocnemius medialis (GM) muscles at rest and at maximal passive stretching in paretic and non-paretic legs...
May 31, 2017: Muscle & Nerve
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