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muscle elastography

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https://www.readbyqxmd.com/read/28218814/mr-elastography-measurement-of-the-effect-of-passive-warmup-prior-to-eccentric-exercise-on-thigh-muscle-mechanical-properties
#1
Paul Kennedy, Lewis J Macgregor, Eric Barnhill, Curtis L Johnson, Michael Perrins, Angus Hunter, Colin Brown, Edwin J R van Beek, Neil Roberts
PURPOSE: To investigate the effect of warmup by application of the thermal agent Deep Heat (DH) on muscle mechanical properties using magnetic resonance elastography (MRE) at 3T before and after exercise-induced muscle damage (EIMD). MATERIALS AND METHODS: Twenty male participants performed an individualized protocol designed to induce EIMD in the quadriceps. DH was applied to the thigh in 50% of the participants before exercise. MRE, T2 -weighted MRI, maximal voluntary contraction (MVC), creatine kinase (CK) concentration, and muscle soreness were measured before and after the protocol to assess EIMD effects...
February 20, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28207961/muscle-stiffness-of-posterior-lower-leg-in-runners-with-a-history-of-medial-tibial-stress-syndrome
#2
Junya Saeki, Masatoshi Nakamura, Sayaka Nakao, Kosuke Fujita, Ko Yanase, Noriaki Ichihashi
Previous history of medial tibial stress syndrome (MTSS) is a risk factor for MTSS relapse, which suggests that there might be some physical factors that are related to MTSS development in runners with a history of MTSS. The relationship between MTSS and muscle stiffness can be assessed in a cross-sectional study that measures muscle stiffness in subjects with a history of MTSS, who do not have pain at the time of measurement, and in those without a history of MTSS. The purpose of this study was to compare the shear elastic modulus, which is an index of muscle stiffness, of all posterior lower leg muscles of subjects with a history of MTSS and those with no history and investigate which muscles could be related to MTSS...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28192875/functions-of-the-subregions-of-the-supraspinatus-muscle
#3
Takuma Yuri, Yoshiki Kuwahara, Hiromi Fujii, Yoshiro Kiyoshige
The aim of this study was to investigate the functions of the six subregions of the supraspinatus muscle (SSP) determined by Kim et al. (2007) using real-time tissue elastography (RTE). Twelve young male volunteers participated. The muscular hardness of the SSP was measured at rest and with contraction of the MMT3 in internal, neutral and external rotations. The SSP was functionally divided into five groups on the basis of the RTE results. These functional areas were roughly classified into three property groups: the anterior-superficial, anterior-middle and anterior-deep subregions, which produce contractile force for abduction; the posterior-deep subregion, which produces contractile force for external rotation; and the posterior-superficial and posterior-middle subregions, which maintain tension...
February 13, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28188109/quantitative-evaluation-of-masseter-muscle-stiffness-in-patients-with-temporomandibular-disorders-using-shear-wave-elastography
#4
Makiko Takashima, Yoshiaki Arai, Atsushi Kawamura, Takafumi Hayashi, Ritsuo Takagi
PURPOSE: The aim of this study was to quantify masseter muscle stiffness in patients with masticatory myofascial pain. METHODS: Stiffness was measured using shear wave elastography, which expresses stiffness as shear wave velocity (Vs). A phantom study was conducted to confirm the reliability of the measuring device. The study participants were 26 females with bilateral masseter muscle pain who were classified into either Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) group Ia (myofascial pain; n=13) or RDC/TMD group Ib (myofascial pain with limited opening; n=13)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28169137/shoulder-horizontal-abduction-stretching-effectively-increases-shear-elastic-modulus-of-pectoralis-minor-muscle
#5
Jun Umehara, Masatoshi Nakamura, Kosuke Fujita, Ken Kusano, Satoru Nishishita, Kojiro Araki, Hiroki Tanaka, Ko Yanase, Noriaki Ichihashi
BACKGROUND: Stretching maneuvers for the pectoralis minor muscle, which involve shoulder horizontal abduction or scapular retraction, are performed in clinical and sports settings because the tightness of this muscle may contribute to scapular dyskinesis. The effectiveness of stretching maneuvers for the pectoralis minor muscle is unclear in vivo. The purpose of this study was to verify the effectiveness of stretching maneuvers for the pectoralis minor muscle in vivo using ultrasonic shear wave elastography...
February 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28167187/reliability-of-assessment-of-upper-trapezius-morphology-its-mechanical-properties-and-blood-flow-in-female-patients-with-myofascial-pain-syndrome-using-ultrasonography
#6
Hakimeh Adigozali, Azadeh Shadmehr, Esmail Ebrahimi, Asghar Rezasoltani, Farrokh Naderi
OBJECTIVE: In the present study, the intra-rater reliability of upper trapezius morphology, its mechanical properties and intramuscular blood circulation in females with myofascial pain syndrome were assessed using ultrasonography. DESIGN: A total of 37 patients (31.05 ± 10 years old) participated in this study. Ultrasonography producer was set up in three stages: a) Gray-scale: to measure muscle thickness, size and area of trigger points; b) Ultrasound elastography: to measure muscle stiffness; and c) Doppler imaging: to assess blood flow indices...
January 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28161870/acute-effect-of-static-stretching-on-passive-stiffness-of-the-human-gastrocnemius-fascicle-measured-by-ultrasound-shear-wave-elastography
#7
Kosuke Hirata, Hiroaki Kanehisa, Naokazu Miyamoto
PURPOSE: Passive muscle stiffness and muscle architecture at a given joint angle, as well as slack angle of the muscle have been shown to change after an acute bout of stretching. However, it remains unclear whether passive muscle stiffness at a given fascicle length is reduced after stretching. We aimed to elucidate the acute effect of static stretching on the passive fascicle stiffness using ultrasound shear wave elastography. METHODS: Shear modulus, fascicle length, and slack angle of the medial gastrocnemius (MG) as well as passive plantar flexion torque during passive dorsiflexion were measured before and after a 5-min static stretching in 14 healthy males...
February 4, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28161094/effects-of-duchenne-muscular-dystrophy-on-muscle-stiffness-and-response-to-electrically-induced-muscle-contraction-a-12-month-follow-up
#8
Lilian Lacourpaille, Raphaël Gross, François Hug, Arnaud Guével, Yann Péréon, Armelle Magot, Jean-Yves Hogrel, Antoine Nordez
The present study aimed to assess the ability of muscle stiffness (shear modulus) and response to electrically-induced muscle contraction to detect changes in muscle properties over a 12-month period in children with Duchenne muscular dystrophy (DMD). Ten children with DMD and nine age-matched healthy male controls participated in two experimental sessions (T0 and T+12months) separated by 12.4 ± 0.9 months. Two contractions of the biceps brachii were electrically-induced during which an ultrasound probe was placed over the muscle...
March 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28129289/ultrasound-shear-wave-elastography-and-contrast-enhancement-effective-biomarkers-in-crohn-s-disease-strictures
#9
Cathy Lu, Xianyong Gui, Wenqian Chen, Tak Fung, Kerri Novak, Stephanie R Wilson
BACKGROUND: Inflammation, fibrosis, and muscular hypertrophy lead to thickened bowel in Crohn's disease forming strictures. Ultrasound shear wave elastography (SWE) measures bowel wall stiffness. Contrast-enhanced ultrasound (CEUS) uniquely detects bowel wall inflammation. We aim to correlate SWE of ileal Crohn's disease in vivo to CEUS peak enhancement and pathology grades of inflammation, fibrosis, and muscular hypertrophy. METHODS: In a prospective institutional review board-approved study, 105 consecutive ileal patients with Crohn's disease received ultrasound...
January 26, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28124872/the-change-in-muscle-hardness-after-static-stretching-evaluated-by-different-ultrasound-elastography-techniques-may-be-equivalent
#10
Takayuki Inami, Takuya Shimizu
No abstract text is available yet for this article.
January 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28124382/effects-of-warm-up-on-hamstring-muscles-stiffness-cycling-vs-foam-rolling
#11
A J Morales-Artacho, L Lacourpaille, G Guilhem
This study investigated the effects of active and/or passive warm-up tasks on the hamstring muscles stiffness through elastography and passive torque measurements. On separate occasions, fourteen males randomly completed four warm-up protocols comprising Control, Cycling, Foam rolling, or Cycling plus Foam rolling (Mixed). The stiffness of the hamstring muscles was assessed through shear wave elastography, along with the passive torque-angle relationship and maximal range of motion (ROM) before, 5, and 30 minutes after each experimental condition...
January 26, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28110933/shear-wave-elastography-of-the-supraspinatus-muscle-and-tendon-repeatability-and-preliminary-findings
#12
Timothy G Baumer, Leah Davis, Jack Dischler, Daniel S Siegal, Marnix van Holsbeeck, Vasilios Moutzouros, Michael J Bey
Shear wave elastography (SWE) is a promising tool for estimating musculoskeletal tissue properties, but few studies have rigorously assessed its repeatability and sources of error. The objectives of this study were to assess: (1) the extent to which probe positioning error and human user error influence measurement accuracy, (2) intra-user, inter-user, and day-to-day repeatability, and (3) the extent to which active and passive conditions affect shear wave speed (SWS) repeatability. Probe positioning and human usage errors were assessed by acquiring SWE images from custom ultrasound phantoms...
January 18, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28108983/shear-wave-elastography-is-a-reliable-and-repeatable-method-for-measuring-the-elastic-modulus-of-the-rectus-femoris-muscle-and-patellar-tendon
#13
Serkan Taş, Mehmet Ruhi Onur, Seval Yılmaz, Abdullah Ruhi Soylu, Feza Korkusuz
OBJECTIVES: The purpose of this study was to determine intraobserver, interobserver, and inter-day reliability levels for stiffness measurements of the patellar tendon and rectus femoris muscle using shear wave elastography (SWE). METHODS: This study was conducted on 12 healthy male individuals. Two examiners measured mean shear wave velocity values of the patellar tendons and rectus femoris muscles of both extremities using a 9L4 (4-9 MHz) transducer and an Acuson S3000 ultrasound system (Siemens Medical Solutions, Mountain View, CA)...
January 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28076414/a-mri-compatible-combined-mechanical-loading-and-mr-elastography-setup-to-study-deformation-induced-skeletal-muscle-damage-in-rats
#14
Jules L Nelissen, Larry de Graaf, Willeke A Traa, Tom J L Schreurs, Kevin M Moerman, Aart J Nederveen, Ralph Sinkus, Cees W J Oomens, Klaas Nicolay, Gustav J Strijkers
Deformation of skeletal muscle in the proximity of bony structures may lead to deep tissue injury category of pressure ulcers. Changes in mechanical properties have been proposed as a risk factor in the development of deep tissue injury and may be useful as a diagnostic tool for early detection. MRE allows for the estimation of mechanical properties of soft tissue through analysis of shear wave data. The shear waves originate from vibrations induced by an external actuator placed on the tissue surface. In this study a combined Magnetic Resonance (MR) compatible indentation and MR Elastography (MRE) setup is presented to study mechanical properties associated with deep tissue injury in rats...
2017: PloS One
https://www.readbyqxmd.com/read/28065540/cardiac-shear-wave-velocity-detection-in-the-porcine-heart
#15
Hendrik J Vos, Bas M van Dalen, Ilkka Heinonen, Johan G Bosch, Oana Sorop, Dirk J Duncker, Antonius F W van der Steen, Nico de Jong
Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation...
January 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28003609/the-development-of-vibration-system-for-applying-magnetic-resonance-elastography-mre-to-the-supraspinatus-muscle
#16
Daiki Ito, Tomokazu Numano, Kazuyuki Mizuhara, Kouichi Takamoto, Takaaki Onishi, Hisao Nishijo
Palpation is a standard clinical tool to diagnose abnormal stiffness changes in soft tissues. However, it is difficult to palpate the supraspinatus muscle because it locates under the trapezius muscle. The magnetic resonance elastography (MRE) uses harmonic mechanical excitation to quantitatively measure the stiffness (shear modulus) of both the superficial and deep tissues. The purpose of this study was to build a vibration system for applying the MRE to the supraspinatus muscle. In this study, a power amplifier and a pneumatic pressure generator were used to supply vibrations to a vibration pad...
2016: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/27988462/spatial-distribution-of-airway-wall-displacements-during-breathing-and-bronchoconstriction-measured-by-ultrasound-elastography-using-finite-element-image-registration
#17
Brian C Harvey, Kenneth R Lutchen, Paul E Barbone
With every breath, the airways within the lungs are strained. This periodic stretching is thought to play an important role in determining airway caliber in health and disease. Particularly, deep breaths can mitigate excessive airway narrowing in healthy subjects, but this beneficial effect is absent in asthmatics, perhaps due to an inability to stretch the airway smooth muscle (ASM) embedded within an airway wall. The heterogeneous composition throughout an airway wall likely modulates the strain felt by the ASM but the magnitude of ASM strain is difficult to measure directly...
March 2017: Ultrasonics
https://www.readbyqxmd.com/read/27977870/ultrasound-elastography-assessment-of-the-median-nerve-in-leprosy-patients
#18
Marcello H Nogueira-Barbosa, Helena B Lugão, Everaldo Gregio-Júnior, Michel D Crema, Mariana T T Kobayashi, Marco A C Frade, Theo Z Pavan, Antonio A O Carneiro
INTRODUCTION: We sought to compare median nerve elasticity between leprosy patients (LP) and healthy volunteers (HV) using ultrasound elastography (UE). METHODS: Two radiologists independently measured the strain ratio of the median nerve/flexor digitorum superficialis muscle (MN/FDSM) of 18 LP and 18 HV using real-time freehand UE. Statistical analysis included intra-class correlation coefficients (ICC) and Mann-Whitney test. RESULTS: The MN/FDSM strain ratio of the LP and HV were 2...
December 15, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27928468/sonoelastography-in-the-musculoskeletal-system-current-role-and-future-directions
#19
REVIEW
Naomi Winn, Radhesh Lalam, Victor Cassar-Pullicino
Ultrasound is an essential modality within musculoskeletal imaging, with the recent addition of elastography. The elastic properties of tissues are different from the acoustic impedance used to create B mode imaging and the flow properties used within Doppler imaging, hence elastography provides a different form of tissue assessment. The current role of ultrasound elastography in the musculoskeletal system will be reviewed, in particular with reference to muscles, tendons, ligaments, joints and soft tissue tumours...
November 28, 2016: World Journal of Radiology
https://www.readbyqxmd.com/read/27914201/shear-wave-ultrasound-elastographic-evaluation-of-the-rotator-cuff-tendon
#20
Stephanie W Hou, Alexander N Merkle, James S Babb, Robert McCabe, Soterios Gyftopoulos, Ronald S Adler
OBJECTIVES: (1) Assess the association between the B-mode morphologic appearance and elasticity in the rotator cuff tendon using shear wave elastography (SWE). (2) Assess the association between SWE and symptoms. METHODS: Institutional Review Board approval and informed consent were obtained. A retrospective review identified 21 studies in 19 eligible patients for whom SWE was performed during routine sonographic evaluations for shoulder pain. Evaluations were compared with 55 studies from 16 asymptomatic volunteers and 6 patients with asymptomatic contralateral shoulders...
January 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
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