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muscle elastography

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https://www.readbyqxmd.com/read/27904961/muscle-elastography-a-new-imaging-technique-for-multiple-sclerosis-spasticity-measurement
#1
G Illomei, G Spinicci, E Locci, M G Marrosu
Multiple sclerosis (MS) spasticity is currently evaluated on the basis of neurological examinations such as Ashworth Scale (AS) and 0-10 NRS. Severity of spasticity is difficult to quantify. We investigated the use of real time elastography (RTHE) ultrasounds for evaluating objectively the muscle fibers status in MS spasticity patients and their changes after a new antispasticity treatment. Two studies were performed. In study A, 110 MS patients underwent a neurological evaluation based on the AS and RTHE. The RTHE images were scored with the new 1-5 muscle fibers rigidity imaging scale, here called MEMSs (Muscle Elastography Multiple Sclerosis Score)...
November 30, 2016: Neurological Sciences
https://www.readbyqxmd.com/read/27874499/muscle-elastography-in-multiple-sclerosis-spasticity
#2
Giovanni Illomei
Ultrasound elastography is a novel imaging modality for evaluating the elasticity of biological tissues. The technique is widely used in oncology to detect and differentiate malignant lesions in soft tissues. Studies have explored use of ultrasound elastography to measure the mechanical properties of muscle in patients with multiple sclerosis spasticity. Real-time elastography was shown to correlate well with subjective scales commonly used to measure MS spasticity. Ultrasound elastography has the potential to become a new objective gold standard to monitor symptom evolution in patients with MS spasticity and to evaluate the efficacy of antispasticity treatment...
December 2016: Neurodegenerative Disease Management
https://www.readbyqxmd.com/read/27854210/skeletal-muscle-quantitative-nuclear-magnetic-resonance-imaging-and-spectroscopy-as-an-outcome-measure-for-clinical-trials
#3
Pierre G Carlier, Benjamin Marty, Olivier Scheidegger, Paulo Loureiro de Sousa, Pierre-Yves Baudin, Eduard Snezhko, Dmitry Vlodavets
Recent years have seen tremendous progress towards therapy of many previously incurable neuromuscular diseases. This new context has acted as a driving force for the development of novel non-invasive outcome measures. These can be organized in three main categories: functional tools, fluid biomarkers and imagery. In the latest category, nuclear magnetic resonance imaging (NMRI) offers a considerable range of possibilities for the characterization of skeletal muscle composition, function and metabolism. Nowadays, three NMR outcome measures are frequently integrated in clinical research protocols...
March 3, 2016: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/27847244/effect-of-scapular-stabilization-during-cross-body-stretch-on-the-hardness-of-infraspinatus-teres-minor-and-deltoid-muscles-an-ultrasonic-shear-wave-elastography-study
#4
Jun Umehara, Satoshi Hasegawa, Masatoshi Nakamura, Satoru Nishishita, Hiroki Umegaki, Hiroki Tanaka, Kosuke Fujita, Ken Kusano, Noriaki Ichihashi
BACKGROUND: Posterior shoulder tightness is a contributing factor to shoulder injuries. Cross-body stretch is a method frequently prescribed to stretch the posterior shoulder structures. This stretching is performed horizontally adducting the shoulder with or without manual stabilization of the scapula by the therapist. However, no studies have investigated the effect of scapular stabilization during cross-body stretch using shear elastic modulus as an index of muscle hardness in vivo...
October 12, 2016: Manual Therapy
https://www.readbyqxmd.com/read/27845853/delayed-onset-muscle-soreness-temporal-assessment-with-quantitative-mri-and-shear-wave-ultrasound-elastography
#5
Christoph A Agten, Florian M Buck, Linda Dyer, Martin Flück, Christian W A Pfirrmann, Andrea B Rosskopf
OBJECTIVE: The objective of our study was to assess delayed-onset muscle soreness (DOMS) over time using quantitative MRI and shear-wave ultrasound (US) elastography. SUBJECTS AND METHODS: Five male (mean age ± SD, 39.6 ± 4.6 years) and five female (30.6 ± 13.5 years) volunteers underwent 1.5-T MRI before and after (15 minutes, 1 day, 3 days, 7 days) performing unilateral eccentric resistance exercise of the elbow flexor muscles. The MRI examinations included fluid-sensitive, DWI, and diffusion-tensor imaging sequences of the distal upper arm...
November 15, 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27845660/investigating-shear-wave-physics-in-a-generic-left-ventricular-model-via-in-vitro-experiments-and-finite-element-simulations
#6
Annette Caenen, Mathieu Pernot, Darya Shcherbakova, Luc Mertens, Mathias Kersemans, Patrick Segers, Abigail Swillens
Shear wave elastography (SWE) is a potentially valuable tool to non-invasively assess ventricular function in children with cardiac disorders, which could help in the early detection of abnormalities in muscle characteristics. Initial experiments demonstrated the potential of this technique in measuring ventricular stiffness, however, its performance remains to be validated as complicated shear wave (SW) propagation characteristics are expected to arise due to the complex non-homogeneous structure of the myocardium...
November 9, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27753239/application-of-shear-wave-elastography-to-estimate-the-stiffness-of-the-male-striated-urethral-sphincter-during-voluntary-contractions
#7
Ryan E Stafford, Rafeef Aljuraifani, François Hug, Paul W Hodges
OBJECTIVES: To investigate whether increases in stiffness can be detected in the anatomical region associated with the striated urethral sphincter during voluntary activation using shear wave elastography; to identify the location and area of the stiffness increase relative to the point of greatest dorsal displacement of the mid urethra (i.e. striated urethral sphincter); and to determine the relationship between muscle stiffness and contraction intensity. SUBJECTS AND METHODS: Ten healthy men participated...
October 18, 2016: BJU International
https://www.readbyqxmd.com/read/27742550/transient-elastography-as-a-noninvasive-assessment-tool-for-hepatopathies-of-different-etiology-in-pediatric-type-1-diabetes-mellitus
#8
Zeinab A Elkabbany, Nancy S Elbarbary, Eman A Ismail, Nesrine A Mohamed, Dina Ragab, Shereen Abdel Alem, Yasmine M Ezzat, Sarah S Maurice, Noha U Hashem
AIM: To identify the prevalence and effect of hepatopathies of different etiologies among pediatric patients with type 1 diabetes mellitus (T1DM) using transient elastography (TE) and its relation to glycemic control. METHODS: One hundred T1DM patients were studied focusing on liver functions, fasting lipid profile, hemoglobin A1c (HbA1c), hepatitis C virus (HCV), serum immunoglobulins, autoimmune antibodies; anti-nuclear antibody (ANA), anti-smooth muscle antibody (ASMA), and anti-liver kidney microsomal antibody (anti-LKM)...
September 26, 2016: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/27742141/evaluation-of-the-effect-of-an-anisotropic-medium-on-shear-wave-velocities-of-intra-muscular-gelatinous-inclusions
#9
Sébastien Aubry, Jean-Philippe Nueffer, Mathieu Carrié
In highly anisotropic biological tissues such as muscle or tendons, calculating Young's modulus from the shear wave speed (csw) by using shear wave elastography (SWE) involves a complex transversally isotropic rheological model not yet used in common practice. To our knowledge, the effect of muscle anisotropy on csw of intra-muscular lesions has not yet been investigated. The objective of our study was to define the effect of an anisotropic medium on csw of intra-muscular gelatinous inclusions. We conducted a prospective monocentric, in vitro study in order to examine the quantitative and qualitative SWE behavior of a 9-mm gelatinous intra-muscular implant depending on the orientation of the probe relative to the muscle fibers...
October 11, 2016: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/27704503/myofascial-trigger-point-pain-syndromes
#10
Robert D Gerwin
Myofascial pain syndromes caused by trigger points (TrPs) in muscle are a common cause of local and generalized pain. Trigger points are hyperirritable zones in contracted bands of muscle, thought to be caused by muscle overload or stress. Stress TrPs have characteristic electromyographic features, and can be visualized with ultrasound and magnetic resonance elastography. Trigger point needling or injection can be effective in inactivating TrP, but correcting triggers is also critical.
October 2016: Seminars in Neurology
https://www.readbyqxmd.com/read/27654034/an-experimental-study-evaluating-the-tissue-structure-of-penis-with-2d-shearwave%C3%A2-elastography
#11
X-H Qiao, J-J Zhang, F Gao, F Li, Y Liu, L-X Xing, L-F Du, J-F Xing
The aim of this study was to investigate the feasibility of two-dimensional-ShearWave™ Elastography (2D-SWE) on evaluating the change of tissue structure of penis. Twenty healthy male Sprague Dawley rats were divided into penis-developed group (PDG, 52 weeks) and penis-underdeveloped group (PUDG, 5 weeks). The ultrafast ultrasound device-Aixplorer® (SuperSonic Imagine) was used for 2D-SWE imaging of the penis, the measurement index was shear wave stiffness (SWS, kPa). All rat penises were cut off immediately after ultrasonic examination...
September 22, 2016: International Journal of Impotence Research
https://www.readbyqxmd.com/read/27599891/ultrasonographic-features-of-traumatic-neuromas-in-breast-cancer-patients-after-mastectomy
#12
Hwa Sung Sung, Young-Seon Kim
Purpose: The purpose of this study was to evaluate the ultrasonographic (US) features of traumatic neuromas in breast cancer patients after mastectomy. Methods: This study was performed with approval from our Institutional Review Board, and the requirement for informed consent was waived. Six traumatic neuromas in five patients were included in this study. The US findings of traumatic neuromas were evaluated retrospectively by two radiologists according to the Breast Imaging-Reporting and Data System (BI-RADS) lexicon...
July 18, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27593916/application-of-shear-wave-elastography-for-the-gastrocnemius-medial-head-to-tennis-leg
#13
Keiichi Yoshida, Yoshiaki Itoigawa, Yuichiro Maruyama, Yoshitomo Saita, Yuji Takazawa, Hiroshi Ikeda, Kazuo Kaneko, Tatsuo Sakai, Toru Okuwaki
INTRODUCTION: Muscle strain of the gastrocnemius medial head mainly occurs at the musculotendinous junction (MTJ), and stiffness is a risk factor. Shear wave elastography (SWE) measures elasticity by determining the propagation velocity. The aim of this study was to measure the elasticity of the normal muscle and aponeurosis in the MTJ of the gastrocnemius medial head using SWE, thus obtaining information relevant to muscle strain at this point. MATERIALS AND METHODS: Forty-one volunteers (82 legs) were recruited and the gastrocnemius medial heads were examined at four points: three on the aponeurosis, namely at the center of the MTJ (Central), 10 mm proximal to it (Proximal) and 10 mm distal to it (Distal); and at one on the muscle belly (Muscle)...
September 4, 2016: Clinical Anatomy
https://www.readbyqxmd.com/read/27583402/biomechanical-effect-of-margin-convergence-techniques-quantitative-assessment-of-supraspinatus-muscle-stiffness
#14
Taku Hatta, Hugo Giambini, Chunfeng Zhao, John W Sperling, Scott P Steinmann, Eiji Itoi, Kai-Nan An
Although the margin convergence (MC) technique has been recognized as an option for rotator cuff repair, little is known about the biomechanical effect on repaired rotator cuff muscle, especially after supplemented footprint repair. The purpose of this study was to assess the passive stiffness changes of the supraspinatus (SSP) muscle after MC techniques using shear wave elastography (SWE). A 30 × 40-mm U-shaped rotator cuff tear was created in 8 cadaveric shoulders. Each specimen was repaired with 6 types of MC technique (1-, 2-, 3-suture MC with/without footprint repair, in a random order) at 30° glenohumeral abduction...
2016: PloS One
https://www.readbyqxmd.com/read/27579699/shear-wave-elastography-assessments-of-quadriceps-stiffness-changes-prior-to-during-and-after-prolonged-exercise-a-longitudinal-study-during-an-extreme-mountain-ultra-marathon
#15
Pierre Andonian, Magalie Viallon, Caroline Le Goff, Charles de Bourguignon, Charline Tourel, Jérome Morel, Guido Giardini, Laurent Gergelé, Grégoire P Millet, Pierre Croisille
In sports medicine, there is increasing interest in quantifying the elastic properties of skeletal muscle, especially during extreme muscular stimulation, to improve our understanding of the impact of alterations in skeletal muscle stiffness on resulting pain or injuries, as well as the mechanisms underlying the relationships between these parameters. Our main objective was to determine whether real-time shear-wave elastography (SWE) can monitor changes in quadriceps muscle elasticity during an extreme mountain ultra-marathon, a powerful mechanical stress model...
2016: PloS One
https://www.readbyqxmd.com/read/27570694/non-contact-single-shot-elastography-using-line-field-low-coherence-holography
#16
Chih-Hao Liu, Alexander Schill, Chen Wu, Manmohan Singh, Kirill V Larin
Optical elastic wave imaging is a powerful technique that can quantify local biomechanical properties of tissues. However, typically long acquisition times make this technique unfeasible for clinical use. Here, we demonstrate non-contact single shot elastographic holography using a line-field interferometer integrated with an air-pulse delivery system. The propagation of the air-pulse induced elastic wave was imaged in real time, and required a single excitation for a line-scan measurement. Results on tissue-mimicking phantoms and chicken breast muscle demonstrated the feasibility of this technique for accurate assessment of tissue biomechanical properties with an acquisition time of a few milliseconds using parallel acquisition...
August 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27512376/new-imaging-methods-for-non-invasive-assessment-of-mechanical-structural-and-biochemical-properties-of-human-achilles-tendon-a-mini-review
#17
REVIEW
Alexandre Fouré
The mechanical properties of tendon play a fundamental role to passively transmit forces from muscle to bone, withstand sudden stretches, and act as a mechanical buffer allowing the muscle to work more efficiently. The use of non-invasive imaging methods for the assessment of human tendon's mechanical, structural, and biochemical properties in vivo is relatively young in sports medicine, clinical practice, and basic science. Non-invasive assessment of the tendon properties may enhance the diagnosis of tendon injury and the characterization of recovery treatments...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27459989/shear-wave-elastography-using-ultrasound-effects-of-anisotropy-and-stretch-stress-on-a-tissue-phantom-and-in-vivo-reactive-lymph-nodes-in-the-neck
#18
Ha Young Lee, Jeong Hyun Lee, Ji Hoon Shin, So Yeon Kim, Hee Jung Shin, Jeong Seon Park, Young Jun Choi, Jung Hwan Baek
Purpose: The purpose of this study was to evaluate how the anisotropy and the static stretch stress of the cervical musculature influence the measured shear modulus in a tissue-mimicking phantom and in cervical lymph nodes in vivo by using shear wave elastography (SWE). Methods: SWE was performed on a phantom using a pig muscle and on the middle jugular cervical lymph nodes in six volunteers. Tissue elasticity was quantified using the shear modulus and a supersonic shear wave imaging technique...
June 8, 2016: Ultrasonography
https://www.readbyqxmd.com/read/27454210/value-of-mri-in-diagnostics-and-evaluation-of-myositis
#19
Nicolò Pipitone
PURPOSE OF REVIEW: This review aims at covering the role of muscle MRI in supporting the diagnosis of myositis, in aiding to differentiate it from other muscle disorders, and in monitoring myositis patients over time by assessing response to treatment and by discriminating between muscle inflammation and chronic damage. RECENT FINDINGS: MRI can assist in 'pattern recognition' of muscle involvement across numerous myopathies, including myositis. Novel applications of magnetic resonance such as cardiac MRI, MR elastography and blood oxigenation level-dependent magnetic resonance can shed light on different aspects of myositis and usefully complement conventional MRI in assessing patients with myositis...
November 2016: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/27435608/shear-wave-elastography-for-the-assessment-of-muscle-stiffness-in-children-with-cp-insights-and-challenges
#20
Lynn Bar-On, Laura C Slane
No abstract text is available yet for this article.
December 2016: Developmental Medicine and Child Neurology
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