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muscle elastography

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
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
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
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
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
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
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
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
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
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
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
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
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
Lynn Bar-On, Laura C Slane
No abstract text is available yet for this article.
July 20, 2016: Developmental Medicine and Child Neurology
Baptiste Moreau, Claudio Vergari, Hisham Gad, Baptiste Sandoz, Wafa Skalli, Sébastien Laporte
There is a lack of numeric data for the mechanical characterization of spine muscles, especially in vivo data. The multifidus muscle is a major muscle for the stabilization of the spine and may be involved in the pathogenesis of chronic low back pain (LBP). Supersonic shear wave elastography (SWE) has not yet been used on back muscles. The purpose of this prospective study is to assess the feasibility of ultrasound SWE to measure the elastic modulus of lumbar multifidus muscle in a passive stretching posture and at rest with a repeatable and reproducible method...
August 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Li-Juan Du, Wen He, Ling-Gang Cheng, Shuo Li, Yue-Song Pan, Jing Gao
OBJECTIVE: The aim of this study was to assess the capability of ultrasound shear wave elastography (SWE) in evaluating the muscle stiffness in patients with Parkinson's diseases (PD). METHODS: Ultrasound SWE of the longitudinal biceps brachii was performed on 46 patients with PD and 31 healthy controls from May 2013 to October 2013. The stiffness of the biceps brachii muscles measured with quantitative Young's modulus (kPa) was compared between the remarkably symptomatic arms and mildly symptomatic arms in the PD and between PD and controls with unpaired t test...
May 29, 2016: Clinical Imaging
Yoshitaka Hashimoto, Takafumi Osaka, Takuya Fukuda, Muhei Tanaka, Masahiro Yamazaki, Michiaki Fukui
Recent cross-sectional studies revealed that sarcopenia is associated with non-alcoholic fatty liver disease (NAFLD) in general population. However, it remains to be elucidated that the association between skeletal muscle mass index (SMI) and hepatic steatosis in patients with type 2 diabetes. In this cross-sectional study of 145 Japanese patients (79 men and 66 women) with type 2 diabetes, we examined the correlation of SMI with hepatic steatosis. Skeletal muscle mass was estimated from bioimpedance analysis measurements and SMI (%) was defined as skeletal muscle mass (kg)/total body weight (kg) × 100...
July 9, 2016: Endocrine Journal
Manuela Götzberger, Susanne Krueger, Roland Gärtner, Martin Reincke, Matthias Pichler, Gerald Assmann, Thomas Mussack, Michael Zimmermann, Veit Gülberg
OBJECTIVE: Strain-elastography provides a new ultrasound-based method that can offer information about the stiffness of thyroid nodules as an indicator of malignancy. The aim of our study was to compare the utility of color-Doppler and strain-elastography in differentiating between benign and malignant nodules. DESIGN AND METHODS: 77 thyroid nodules (70 benign and 7 malignant) from 70 unselected patients (48 female/22 male, mean age 49.7±14.3 years) were evaluated with color-Doppler and elastography based on a five-scale elastogram score for qualitative elastography and strain ratio for quantitative elastography...
April 2016: Hormones: International Journal of Endocrinology and Metabolism
Daiki Ito, Tomokazu Numano, Kazuyuki Mizuhara, Koichi Takamoto, Takaaki Onishi, Hisao Nishijo
Magnetic resonance elastography (MRE) can measure tissue stiffness quantitatively and noninvasively. Supraspinatus muscle injury is a significant problem among throwing athletes. The purpose of this study was to develop an MRE technique for application to the supraspinatus muscle by using a conventional magnetic resonance imaging (MRI). MRE acquisitions were performed with a gradient-echo type multi-echo MR sequence at 100Hz pneumatic vibration. A custom-designed vibration pad was used as a pneumatic transducer in order to adapt to individual shoulder shapes...
October 2016: Magnetic Resonance Imaging
Joline E Brandenburg, Sarah F Eby, Pengfei Song, Shirley Kingsley-Berg, William Bamlet, Gary C Sieck, Kai-Nan An
AIM: The aim of this study was to compare passive muscle stiffness in children with cerebral palsy (CP) and children with typical development using a novel ultrasound technique: ultrasound shear wave elastography (SWE). METHOD: We conducted a prospective study of 13 children with CP (six females and seven males, median age 5y 1mo [interquartile range 4y 4mo-7y 8mo]) and 13 children with typical development (six females and seven males, median age 5y 3mo [interquartile range 4y 4mo-9y 4mo])...
July 4, 2016: Developmental Medicine and Child Neurology
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