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Tendon elastography

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
Salvatore Gitto, Anna Guja Draghi, Chandra Bortolotto, Ferdinando Draghi
This review aims to provide the radiologist with simple and systematic guidelines for evaluation of the Achilles tendon after complete rupture repair. Currently, there is a plethora of nonsurgical and surgical treatments, but sonographic examination has shown no significant differences between them. A systematic analysis of several parameters (morphologic characteristics, structure, color Doppler vascularization, and mobility) should be undertaken. Morphologically, the repaired tendon is larger, wider, or both...
October 13, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Kadir Ağladıoğlu, Nuray Akkaya, Harun R Güngör, Semih Akkaya, Nusret Ök, Levent Özçakar
OBJECTIVES: The aim of this study was to explore the sonographic and elastographic properties of patellar and Achilles tendons in smoking and nonsmoking otherwise healthy adults. METHODS: We conducted a level 3 case-control analytical study. Smoking and nonsmoking volunteers (>18 years) without musculoskeletal system disorders were included in the study. Demographic characteristics and smoking habits (pack-years) were recorded. Proximal, middle, and distal third thicknesses of the patellar and Achilles tendons were measured by B-mode sonography...
September 23, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Ayse Nur Sirin Ozcan, Sinan Tan, Nuray Gulden Tangal, Saliha Cıracı, Savas Kudas, Suleyman Bulent Bektaser, Halil Arslan
AIMS: The comparison of elastographic features of quadriceps and patellar tendons in a group of professional athletes and healthy volunteers and the description of elasticity characteristics of these tendons. MATERIAL AND METHODS: Thirty-nine professional athletes (22 male, 17 female; mean age 18.5 years) and 35 healthy volunteers (21 male, 14 female; mean age 19 years) were included. They were divided into two groups by gender. Quadriceps tendon, patellar side of the patellar tendon, and tibial side of the patellar tendon elasticity patterns and strain ratios were investigated with real-time ultrasound elastography...
September 2016: Medical Ultrasonography
James F Greenleaf, Matthew W Urban
No abstract text is available yet for this article.
October 2016: Academic Radiology
H Botanlioglu, G Kaynak, F Kantarci, M F Guven, G Zengin, O Aydingoz
PURPOSE: To compare the length, thickness, and elasticity of the patellar tendon between operated and non-operated knees following closed wedge high tibial osteotomy (CWHTO). METHODS: Three men and 17 women aged 52 to 75 (mean, 64.8) years who underwent unilateral CWHTO by a single surgeon and were followed up for a mean of 11 (range, 5-22) years were included, as were 3 male and 17 female healthy controls aged 35 to 61 (mean, 47.9) years. The length, thickness, and elasticity of the bilateral patellar tendons in the patients and healthy controls were measured using shear wave elastography...
August 2016: Journal of Orthopaedic Surgery
Matthew J Martin, Michael S Cartwright
INTRODUCTION: Strain elastography that uses the body's cardiorespiratory pulsations to determine tissue stiffness (referred to here as "ambient strain elastography") has not been previously described for the assessment of carpal tunnel syndrome. The objective of this study is to assess the reliability of ultrasonographic ambient strain elastography in the evaluation of carpal tunnel syndrome and compare median nerve stiffness between patients and healthy controls. METHODS: Ambient strain elastography was used to examine 17 patient and 26 control wrists in cross-sectional and longitudinal views, twice by two observers...
August 24, 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
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
Shuai Fu, Ligang Cui, Xiaoxi He, Yang Sun
OBJECTIVES: To assess the elastic properties of the normal Achilles tendon in different age groups by Virtual Touch imaging quantification (VTIQ; Siemens Medical Solutions, Malvern, PA) shear wave elastography. METHODS: A total of 326 healthy volunteers older than 18 years were divided into different groups by sex and age. The thickness, shear wave velocity (SWV) in sagittal and axial sections, and anisotropic coefficient of the Achilles tendon in a state of relaxation were obtained by conventional sonography and Virtual Touch imaging quantification elastography...
September 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
Timm Dirrichs, Valentin Quack, Matthias Gatz, Markus Tingart, Christiane K Kuhl, Simone Schrading
RATIONALE AND OBJECTIVES: Shear wave elastography (SWE) has been shown to be a powerful tool to estimate tissue stiffness. The aim of this study was to compare the diagnostic accuracy of SWE to that of standard ultrasound (US) (combined use of B-mode US and power Doppler [PD] US) for diagnosing tendinopathies. MATERIALS AND METHODS: This is a prospective institutional review board-approved study on 112 participants (mean age 42 ± 13.4 years) with chronic (>6 months) tendon pain in Achilles, patellar, or epicondylar tendons...
October 2016: Academic Radiology
Łukasz Paluch, Ewa Nawrocka-Laskus, Janusz Wieczorek, Bartosz Mruk, Małgorzata Frel, Jerzy Walecki
This article presents possible applications of ultrasound elastography in musculoskeletal imaging based on the available literature, as well as the possibility of extending indications for the use of elastography in the future. Ultrasound elastography (EUS) is a new method that shows structural changes in tissues following application of physical stress. Elastography techniques have been widely used to assess muscles and tendons in vitro since the early parts of the twentieth century. Only recently with the advent of new technology and creation of highly specialized ultrasound devices, has elastography gained widespread use in numerous applications...
2016: Polish Journal of Radiology
Laura Chernak Slane, Jack Martin, Ryan DeWall, Darryl Thelen, Kenneth Lee
OBJECTIVES: Evaluate the effects of aging on healthy Achilles tendon and aponeurosis shear wave speed (SWS), a quantitative metric which reflects tissue elasticity. METHODS: Shear wave elastography was used to measure spatial variations in Achilles tendon SWS in healthy young (n = 15, 25 ± 4 years), middle-aged (n = 10, 49 ± 4 years) and older (n = 10, 68 ± 5 years) adults. SWS was separately measured in the free Achilles tendon, soleus aponeurosis and gastrocnemius aponeurosis in resting (R), stretched (dorsiflexed 15° from R) and slack (plantarflexed 15° from R) postures...
May 28, 2016: European Radiology
Taku Hatta, Hugo Giambini, Alexander W Hooke, Chunfeng Zhao, John W Sperling, Scott P Steinmann, Nobuyuki Yamamoto, Eiji Itoi, Kai-Nan An
PURPOSE: To investigate the alteration of passive stiffness in the supraspinatus muscle after double-row (DR) and knotless transosseous-equivalent (KL-TOE) repair techniques, using shear wave elastography (SWE) in cadavers with rotator cuff tears. We also aimed to compare altered muscular stiffness after these repairs to that obtained from shoulders with intact rotator cuff tendon. METHODS: Twelve fresh-frozen cadaveric shoulders with rotator cuff tear (tear size: small [6], medium-large [6]) were used...
May 4, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Semih Akkaya, Nuray Akkaya, Kadir Agladıoglu, Harun R Gungor, Nusret Ok, Levent Özçakar
INTRODUCTION: Patellar tendon donor site has been previously evaluated in patients with auto-graft bone-tendon-bone (BTB) anterior cruciate ligament (ACL) reconstruction using either magnetic resonance imaging or B mode ultrasound. However, donor site patellar tendon strain ratio-reflecting structural features-has not been studied with US elastography. Here, we ascertain real-time elastography properties of patellar tendon donor site and clinical relevance of these properties in patients with auto-graft BTB ACL reconstruction in the postoperative period...
June 2016: Archives of Orthopaedic and Trauma Surgery
Tsz-Chun Roxy Chiu, Hiu-Ching Ngo, Lai-Wa Lau, King-Wah Leung, Man-Him Lo, Ho-Fai Yu, Michael Ying
AIMS: This study was undertaken to investigate the immediate effect of static stretching on normal Achilles tendon morphology and stiffness, and the different effect on dominant and non-dominant legs; and to evaluate inter-operator and intra-operator reliability of using shear-wave elastography in measuring Achilles tendon stiffness. METHODS: 20 healthy subjects (13 males, 7 females) were included in the study. Thickness, cross-sectional area and stiffness of Achilles tendons in both legs were measured before and after 5-min static stretching using grey-scale ultrasound and shear-wave elastography...
2016: PloS One
Li-ning Zhang, Wen-bo Wan, Yue-xiang Wang, Zi-yu Jiao, Li-hai Zhang, Yu-kun Luo, Pei-fu Tang
BACKGROUND There has been no published report assessing the mechanical properties of a repaired Achilles tendon after surgery using shear wave elastography (SWE). The aim of this study was to investigate the changes in mechanical properties of the healing Achilles tendon after surgical repair of a tendon rupture using ultrasound SWE and how these changes correlate with tendon function. MATERIAL AND METHODS Twenty-six patients who underwent surgical repair for Achilles tendon rupture were examined with ultrasound SWE coupled with a linear array transducer (4-15 MHz)...
2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Wai-Lam Siu, Chi-Ho Chan, Cheuk-Hei Lam, Chu-Man Lee, Michael Ying
OBJECTIVES: This study aimed to assess the feasibility of using quantitative shear wave elastography (SWE) to assess the stiffness (Young's modulus) of Achilles tendon and to investigate the effect of long-term weight-bearing exercise on the stiffness of human Achilles tendon by comparing the frequent and infrequent exercise groups. DESIGN: Case-control study. METHODS: A total of 36 healthy subjects aged 19-25 were recruited. Subjects were categorized into frequent and infrequent exercise groups dependent on their level of lower limb weight bearing exercise...
March 11, 2016: Journal of Science and Medicine in Sport
C Helfenstein-Didier, R J Andrade, J Brum, F Hug, M Tanter, A Nordez, J-L Gennisson
The shear wave velocity dispersion was analyzed in the Achilles tendon (AT) during passive dorsiflexion using a phase velocity method in order to obtain the tendon shear modulus (C 55). Based on this analysis, the aims of the present study were (i) to assess the reproducibility of the shear modulus for different ankle angles, (ii) to assess the effect of the probe locations, and (iii) to compare results with elasticity values obtained with the supersonic shear imaging (SSI) technique. The AT shear modulus (C 55) consistently increased with the ankle dorsiflexion (N = 10, p < 0...
March 21, 2016: Physics in Medicine and Biology
Kosuke Hirata, Eri Miyamoto-Mikami, Hiroaki Kanehisa, Naokazu Miyamoto
PURPOSE: It remains unclear whether the acute effect of stretching on passive muscle stiffness differs among the synergists. We examined the muscle stiffness responses of the medial (MG) and lateral gastrocnemii (LG), and soleus (Sol) during passive dorsiflexion before and after a static stretching by using ultrasound shear wave elastography. METHODS: Before and after a 5-min static stretching by passive dorsiflexion, shear modulus of the triceps surae and the Achilles tendon (AT) during passive dorsiflexion in the knee extended position were measured in 12 healthy subjects...
May 2016: European Journal of Applied Physiology
Yuting Ling, Chunhui Li, Kairui Feng, Robyn Duncan, Roos Eisma, Zhihong Huang, Ghulam Nabi
Fixed and preserved tissues have been massively used in the development of biomedical equipment and instrumentation. Not only the tissue morphology, but also its mechanical properties need to be considered in the fixation and preservation procedures since mechanical properties have significant influence on the design and performance of such instruments. Understanding the effects of storage and preservation conditions on the mechanical properties of soft tissue has both clinical and experimental significance...
May 3, 2016: Journal of Biomechanics
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