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Shearwave

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https://www.readbyqxmd.com/read/28717616/topical-polidocanol-application-in-combination-with-static-stretching-in-tendinopathies-a-prospective-pilot-study
#1
Matthias Gatz, Simone Schrading, Timm Dirrichs, Marcel Betsch, Markus Tingart, Björn Rath, Christiane Kuhl, Valentin Quack
BACKGROUND: Highly operator-based injection therapy with vasosclerosing and anesthetic polidocanol is used for tendinopathies. This pilot-study evaluates the topical application of polidocanol gel. METHODS: Prospective case series. 39 patients with tendinopathies (14 Achilles, 14 patella, 11 wrist extensors) with a symptom duration > 6 months were included. Polidocanol and static stretching were the therapy in the first 2 weeks, while static stretching was continuously performed for 6 months...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28707752/analysis-of-the-correlation-between-knee-extension-torque-and-patellar-tendon-elastic-property
#2
P Mannarino, K M M Lima, C R C Fontenelle, T T Matta, B F de Salles, R Simão, L F Oliveira
PURPOSE: Quadriceps strength and patellar tendon (PT) are directly linked and intimately related to daily activities and lower limb function. However, the correlation between knee extension torque (KT) and PT Young's modulus (E) measured directly is still unknown. METHOD: We used supersonic shearwave imaging (SSI) to evaluate the elastic property of PT in healthy young men and analysed its correlation with KT. Twenty-two healthy young males were included and both knees were examined...
July 14, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28561920/2d-and-shearwave-elastography-ultrasound-a-reliable-method-to-analyse-spastic-muscles
#3
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
https://www.readbyqxmd.com/read/28000623/attenuation-measuring-ultrasound-shearwave-elastography-and-in-vivo-application-in-post-transplant-liver-patients
#4
Ivan Z Nenadic, Bo Qiang, Matthew W Urban, Heng Zhao, William Sanchez, James F Greenleaf, Shigao Chen
Ultrasound and magnetic resonance elastography techniques are used to assess mechanical properties of soft tissues. Tissue stiffness is related to various pathologies such as fibrosis, loss of compliance, and cancer. One way to perform elastography is measuring shear wave velocity of propagating waves in tissue induced by intrinsic motion or an external source of vibration, and relating the shear wave velocity to tissue elasticity. All tissues are inherently viscoelastic and ignoring viscosity biases the velocity-based estimates of elasticity and ignores a potentially important parameter of tissue health...
January 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27908579/safety-of-transient-elastography-in-patients-with-implanted-cardiac-rhythm-devices
#5
Mireen Friedrich-Rust, Fabian Schoelzel, Sven Linzbach, Joerg Bojunga, Stefan Zeuzem, Florian Seeger
BACKGROUND: At present the use of transient elastography (TE) in patients with pacemaker (PM) or implantable cardioverter defibrillator (ICD) devices is not recommended, since the safety due to the electromagnet embarked in the vibrator for producing the shearwave has not been evaluated. However, no adverse events of sonographic examinations in this patient group have been reported. AIMS: The aim of the present study was to evaluate the safety of TE in patients with PM or ICD...
November 17, 2016: Digestive and Liver Disease
https://www.readbyqxmd.com/read/27858670/viscoelastic-properties-of-normal-rat-liver-measured-by-ultrasound-elastography-comparison-with-oscillatory-rheometry
#6
Haoming Lin, Yuanyuan Shen, Xin Chen, Ying Zhu, Yi Zheng, Xinyu Zhang, Yanrong Guo, Tianfu Wang, Siping Chen
BACKGROUND: Ultrasound elastography has been widely used to measure liver stiffness. However, the accuracy of liver viscoelasticity obtained by ultrasound elastography has not been well established. OBJECTIVE: To assess the accuracy of ultrasound elastography for measuring liver viscoelasticity and compare to conventional rheometry methods. In addition, to determine if combining these two methods could delineate the rheological behavior of liver over a wide range of frequencies...
2016: Biorheology
https://www.readbyqxmd.com/read/27814955/model-dependent-and-model-independent-approaches-for-evaluating-hepatic-fibrosis-in-rat-liver-using-shearwave-dispersion-ultrasound-vibrometry
#7
Haoming Lin, Xinyu Zhang, Yuanyuan Shen, Yi Zheng, Yanrong Guo, Ying Zhu, Xianfen Diao, Tianfu Wang, Siping Chen, Xin Chen
This study assesses gradations of hepatic fibrosis in rat livers using both model-dependent and model-independent approaches. Liver fibrosis was induced in 37 rats using carbon tetrachloride (CCl4); 6 rats served as the controls. Shear wave velocity as a function of frequency, referred to as velocity dispersion, was measured in vitro by an ultrasound elastography method called shearwave dispersion ultrasound vibrometry (SDUV). For the model-dependent approach, the velocity dispersion data were fit to the Voigt model to solve the viscoelastic modulus...
January 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27511435/supersonic-shearwave-elastography-in-the-assessment-of-liver-fibrosis-for-postoperative-patients-with-biliary-atresia
#8
Shuling Chen, Bing Liao, Zhihai Zhong, Yanling Zheng, Baoxian Liu, Quanyuan Shan, Xiaoyan Xie, Luyao Zhou
To explore an effective noninvasive tool for monitoring liver fibrosis of children with biliary atresia (BA) is important but evidences are limited. This study is to investigate the predictive accuracy of supersonic shearwave elastography (SSWE) in liver fibrosis for postoperative patients with BA and to compare it with aspartate aminotransferase to platelet ratio index (APRI) and fibrosis-4 (FIB-4). 24 patients with BA received SSWE and laboratory tests before scheduled for liver biopsy. Spearman rank coefficient and receiver operating characteristic (ROC) were used to analyze data...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27401500/an-experimental-study-quantitatively-evaluating-the-change-of-the-content-of-collagen-fibres-in-penis-with-two-dimensional-shearwave-%C3%A2-elastography
#9
X-H Qiao, J-J Zhang, F Gao, F Li, M Bai, L-F Du, J-F Xing
The purpose of this study was to explore the value of two-dimensional ShearWave(™) Elastography (2D-SWE) on quantitatively evaluating the change of the content of collagen fibres in penis. Twenty male Sprague Dawley rats were divided into the pre-sexual maturity group (Group 1) and the sexual decline group (Group 2) according to age. The ultrafast ultrasound device Aixplorer(®) (SuperSonic Imagine, Aix-en-Provence, France) was used for 2D-SWE imaging of penis, and the measurement index was shear wave stiffness (SWS)...
June 2017: Andrologia
https://www.readbyqxmd.com/read/27085721/shearwave-elastography-of-fetal-lungs-in-pregnant-baboons
#10
E Quarello, R Lacoste, J Mancini, S Melot-Dusseau, G Gorincour
PURPOSE: The purpose of this study was to evaluate the feasibility and reproducibility of transabdominal ShearWave elastography of fetal lungs in pregnant baboons. MATERIALS AND METHODS: During a 9-month period (03/2013-12/2013), two operators prospectively performed ultrasound examinations of fetal lung in pregnant baboons in a primate research center. Evaluation of fetal lungs was first performed in B mode. The ShearWave elastography mode was then activated. Three elasticity measurements were performed by each operator for each lung...
June 2016: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/27015196/shearwave-elastography-increases-diagnostic-accuracy-in-characterization-of-breast-lesions
#11
Wei Lin Ng, Kartini Rahmat, Farhana Fadzli, Faizatul Izza Rozalli, Mohammad Nazri Mohd-Shah, Patricia Ann Chandran, Caroline Judy Westerhout, Anushya Vijayananthan, Yang Faridah Abdul Aziz
The purpose of this study was to investigate the diagnostic efficacy of shearwave elastography (SWE) in differentiating between benign and malignant breast lesions.One hundred and fifty-nine lesions were assessed using B-mode ultrasound (US) and SWE parameters were recorded (Emax, Emean, Emin, Eratio, SD). SWE measurements were then correlated with histopathological diagnosis.The final sample contained 85 benign and 74 malignant lesions. The maximum stiffness (Emax) with a cutoff point of ≥ 56.0 kPa (based on ROC curves) provided sensitivity of 100...
March 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/26708641/nanofibrous-clinical-grade-collagen-scaffolds-seeded-with-human-cardiomyocytes-induces-cardiac-remodeling-in-dilated-cardiomyopathy
#12
Pierre Joanne, Maria Kitsara, Solène-Emmanuelle Boitard, Hany Naemetalla, Valérie Vanneaux, Mathieu Pernot, Jérôme Larghero, Patricia Forest, Yong Chen, Philippe Menasché, Onnik Agbulut
Limited data are available on the effects of stem cells in non-ischemic dilated cardiomyopathy (DCM). Since the diffuse nature of the disease calls for a broad distribution of cells, this study investigated the scaffold-based delivery of human induced pluripotent stem cell-derived cardiomyocytes (hiPS-CM) in a mouse model of DCM. Nanofibrous scaffolds were produced using a clinical grade atelocollagen which was electrospun and cross-linked under different conditions. As assessed by scanning electron microscopy and shearwave elastography, the optimum crosslinking conditions for hiPS-CM colonization proved to be a 10% concentration of citric acid crosslinking agent and 150 min of post-electrospinning baking...
February 2016: Biomaterials
https://www.readbyqxmd.com/read/26637242/comparison-of-acoustic-structure-quantification-asq-shearwave-elastography-and-histology-in-patients-with-diffuse-hepatopathies
#13
COMPARATIVE STUDY
Jan Keller, Tanja Eva-Maria Kaltenbach, Mark Martin Haenle, Suemeyra Oeztuerk, Tilmann Graeter, Richard Andrew Mason, Thomas Seufferlein, Wolfgang Kratzer
BACKGROUND: Objective of the study was to evaluate the diagnostic value of novel ultrasonographic modalities in comparison with simultaneously performed liver biopsy. METHODS: The results of simultaneously performed examinations using Acoustic Structure Quantification (ASQ), Virtual Touch Imaging and Quantification (VTIQ) and Virtual Touch Tissue Quantification (VTTQ) were compared with the findings of liver biopsy in patients with a wide variety of diffuse hepatopathies (n = 51)...
December 3, 2015: BMC Medical Imaging
https://www.readbyqxmd.com/read/26607575/the-influence-of-precompression-on-elasticity-of-thyroid-nodules-estimated-by-ultrasound-shear-wave-elastography
#14
A C L Lam, S W A Pang, A T Ahuja, K S S Bhatia
OBJECTIVES: To investigate the influence of variations in resting pressure (precompression) on thyroid ultrasound supersonic shear wave elastography (SWE). METHODS: Thirty-five normal thyroid glands (Norm), 55 benign hyperplastic nodules (BHN), and 17 papillary thyroid cancers (PTC) in 96 subjects underwent thyroid SWE. Four precompression levels were applied manually by the operator, ranging from A (baseline, 0 % strain) to D (high, 22-30 % strain). SWE results at each precompression level were compared using ANOVA tests with P < 0...
August 2016: European Radiology
https://www.readbyqxmd.com/read/26480591/beyond-biopsy-the-cost-benefits-of-shearwave-elastography-for-liver-diagnosis
#15
Aymeric Guibal
No abstract text is available yet for this article.
July 2015: Radiology Management
https://www.readbyqxmd.com/read/26194174/feasibility-and-reproducibility-of-shearwave-tm-elastography-of-fetal-baboon-organs
#16
Edwin Quarello, Romain Lacoste, Julien Mancini, Sandrine Melot-Dusseau, Guillaume Gorincour
OBJECTIVES: The purpose of this study was to assess the feasibility and reproducibility of transabdominal ShearWave(TM) elastography of fetal organs in pregnant baboons. MATERIALS AND METHODS: Fetal ultrasounds of all pregnant baboons in a single primate research center were performed prospectively during 9 months. The visualization of fetal targeted organs (liver, proximal and distal lungs, brain white matter and periventricular gray matter) was initially performed using 2D ultrasound, and then elastography mode was activated...
November 2015: Prenatal Diagnosis
https://www.readbyqxmd.com/read/26126839/effects-of-habitual-loading-on-patellar-tendon-mechanical-and-morphological-properties-in-basketball-and-volleyball-players
#17
Z J Zhang, G Y F Ng, S N Fu
PURPOSE: Tendon mechanical properties are linked to sports performance and tendon-related injuries, such as tendinopathy. Whether habitual loading, such as participation in regular jumping activities, would induce adaptation on tendon mechanical properties remains unclear. METHOD: Forty healthy subjects (10 sedentary, 15 volleyball players, and 15 basketball players) aged between 18 and 35 years were recruited. Supersonic shearwave imaging was used to measure the shear elastic modulus and thickness and cross-sectional area (CSA) of the proximal patellar tendons of both knees at 30° of flexion...
November 2015: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/25936703/roles-of-acoustic-radiation-force-impulse-and-two-dimensional-shearwave-elastography-in-grading-liver-fibrosis-in-rabbits
#18
Nan Li, Yu-kun Luo, Wen-bo Tang
OBJECTIVE: To explore the difference between acoustic radiation force impulse (ARFI) and two-dimensional shearwave elastography (2D-SWE) in grading liver fibrosis (LF). METHODS: Sixty New Zealand rabbits were divided into control group (n=10; without any treatment) and LF group (n=50; treated with CCl4 to induce LF at different degrees). Liver stiffness (LS) were measured in all the animals using ARFI and 2D-SWE, and liver tissues in the same sites were collected for pathological analysis...
April 2015: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/25814397/changes-in-the-elasticity-of-fibroadenoma-during-the-menstrual-cycle-determined-by-real-time-sonoelastography
#19
Fahrettin Kılıç, Yasemin Kayadibi, Pinar Kocael, Mehmet Velidedeoglu, Ahmet Bas, Selim Bakan, Fatih Aydogan, Adem Karatas, Mehmet Halit Yılmaz
OBJECTIVE: Shear-wave elastography (SWE) presents quantitative data that thought to represent intrinsic features of the target tissue. Factors affecting the metabolism of the breast parenchyma as well as age, menstrual cycle, hormone levels, pregnancy and lactation, pre-compression artifact during the examination could affect these elastic intrinsic features. Aim of our study is to determine variation of fibroadenoma elasticity during the menstrual cycle (MC) by means of real-time shear-wave elastography (SWE) and identify the optimal time for SWE evaluation...
June 2015: European Journal of Radiology
https://www.readbyqxmd.com/read/25724446/-shear-waves-elastography-of-the-placenta-in-pregnant-baboon
#20
E Quarello, R Lacoste, J Mancini, S Melot-Dusseau, G Gorincour
OBJECTIVES: To evaluate tissue characteristics of the placenta by transabdominal ShearWave Elastography in pregnant baboon. MATERIALS AND METHOD: For 9 months (03/2013-12/2013) two operators (EQ, GG) performed ultrasound of the placenta during pregnancy pregnant baboons station partner primatology project. The identification of the placenta was performed previously in 2D ultrasound. The elastography method was then activated. Three measurements were carried out by operator for each placenta...
March 2015: Gynécologie, Obstétrique & Fertilité
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