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Shear-wave elastography

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https://www.readbyqxmd.com/read/28740756/sonographic-evaluation-of-the-immediate-effects-of-eccentric-heel-drop-exercise-on-achilles-tendon-and-gastrocnemius-muscle-stiffness-using-shear-wave-elastography
#1
Wilson K C Leung, K L Chu, Christopher Lai
BACKGROUND: Mechanical loading is crucial for muscle and tendon tissue remodeling. Eccentric heel drop exercise has been proven to be effective in the management of Achilles tendinopathy, yet its induced change in the mechanical property (i.e., stiffness) of the Achilles tendon (AT), medial and lateral gastrocnemius muscles (MG and LG) was unknown. Given that shear wave elastography has emerged as a powerful tool in assessing soft tissue stiffness with promising intra- and inter-operator reliability, the objective of this study was hence to characterize the stiffness of the AT, MG and LG in response to an acute bout of eccentric heel drop exercise...
2017: PeerJ
https://www.readbyqxmd.com/read/28735336/acoustic-radiation-force-impulse-arfi-elastography-and-serological-markers-in-assessment-of-liver-fibrosis-and-free-portal-pressure-in-patients-with-hepatitis-b
#2
Jun Li, Jie Yu, Xin-Yu Peng, Ting-Ting Du, Jia-Jia Wang, Jin Tong, Gui-Lin Lu, Xiang-Wei Wu
BACKGROUND The aim of this study was to investigate the feasibility of using acoustic radiation force impulse (ARFI) elastography, AST-to-platelet ratio index (APRI), and FIB-4 in assessing liver fibrosis and free portal pressure in patients with hepatitis B. MATERIAL AND METHODS We enrolled 126 patients with hepatitis B who underwent liver surgery at the General Surgery Department of the First Affiliated Hospital of Shihezi University Medical School from February 2013 to August 2015. Preoperatively, shear wave velocity (SWV) of the liver was measured with the Siemens S2000 ultrasound system to reflect liver stiffness...
July 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28731271/ultrasound-elastography-for-carpal-tunnel-pressure-measurement-a-cadaveric-validation-study
#3
Kazutoshi Kubo, Boran Zhou, Yu-Shiuan Cheng, Tai-Hua Yang, Bo Qiang, Kai-Nan An, Steven L Moran, Peter C Amadio, Xiaoming Zhang, Chunfeng Zhao
Carpal tunnel pressure is a key factor in the etiology of carpal tunnel syndrome. Numerous approaches have been conducted to measure carpal tunnel pressure. However, most techniques are invasive and take time and effort. We have developed an innovative approach to noninvasively assess the tunnel pressure by using the ultrasound surface wave elastography (USWE) technique. In a previous study it was shown that the shear wave speed in a tendon increased linearly with increasing tunnel pressure enclosed the tendon in a simple tendon model...
July 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28720285/ultrasound-based-shear-wave-elastography-in-the-assessment-of-patients-with-diabetic-kidney-disease
#4
Flaviu Bob, Iulia Grosu, Ioan Sporea, Simona Bota, Alina Popescu, Alexandra Sima, Roxana Şirli, Ligia Petrica, Romulus Timar, Adalbert Schiller
In previous studies of acoustic radiation force impulse (ARFI) elastography, using Virtual Touch tissue quantification (VTQ) (Siemens Acuson S2000), it was reported that the measurement of renal shear wave speed in patients with chronic kidney disease (CKD) is not influenced exclusively by renal fibrosis. The purpose of the present study was to analyze the role of VTQ in patients with diabetic kidney disease, considered the main cause of CKD. The study group included 164 patients: 80 patients with diabetic kidney disease (DKD) and 84 without renal disease or diabetes mellitus...
July 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28720056/influence-of-tissue-microstructure-on-shear-wave-speed-measurements-in-plane-shear-wave-elastography-a-computational-study-in-lossless-fibrotic-liver-media
#5
Yu Wang, Jingfeng Jiang
Shear wave elastography (SWE) has been used to measure viscoelastic properties for characterization of fibrotic livers. In this technique, external mechanical vibrations or acoustic radiation forces are first transmitted to the tissue being imaged to induce shear waves. Ultrasonically measured displacement/velocity is then utilized to obtain elastographic measurements related to shear wave propagation. Using an open-source wave simulator, k-Wave, we conducted a case study of the relationship between plane shear wave measurements and the microstructure of fibrotic liver tissues...
July 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28708299/shear-wave-elastography-for-surgically-verified-breast-papillary-lesions-is-it-effective-for-differentiation-between-benign-and-malignant-lesions
#6
Hye Jeong Choi, Kyung Hee Ko, Hae Kyoung Jung
OBJECTIVES: To evaluate the effectiveness of shear wave elastography (SWE) for differentiating benign from malignant breast papillary lesions METHODS: B-mode ultrasound (US) and SWE were available in 56 surgically confirmed papillary lesions (48 [85.7%] benign and 8 [14.3%] malignant). The diagnostic performances of US, SWE parameters, and combined US with SWE parameters were calculated by receiver operating characteristic curve analysis and compared. RESULTS: The highest area under the receiver operating characteristic curve (Az ) value for US was 0...
July 14, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28705067/pancreatic-elastography-from-acoustic-radiation-force-impulse-imaging-for-evaluation-of-diabetic-microangiopathy
#7
Yu He, Hui Wang, Xiao Ping Li, Juan-Juan Zheng, Chun-Xiang Jin
OBJECTIVE: The purposes of this study were to compare pancreatic shear-wave velocity (SWV) in subjects with and those without diabetic microvascular complications and to investigate the feasibility of pancreatic SWV in evaluating diabetic microangiopathy. SUBJECTS AND METHODS: SWV measurements were prospectively performed in 115 patients with diabetes mellitus and 115 healthy persons by use of acoustic radiation force impulse imaging. Patients with diabetes were divided into subgroups with and without microangiopathy...
July 13, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28698404/association-of-conventional-ultrasound-elastography-and-clinicopathological-factors-with-axillary-lymph-node-status-in-invasive-ductal-breast-carcinoma-with-sizes-10-mm
#8
Hui Liu, Guang Xu, Ming-Hua Yao, Huan Pu, Yan Fang, Li-Hua Xiang, Rong Wu
BACKGROUND: To evaluate whether conventional ultrasound, elastography [conventional strain elastography of elasticity imaging, acoustic radiation force impulse induced strain elastography of virtual touch tissue imaging, and a novel two-dimensional shear wave elastography of virtual touch tissue imaging quantification] and clinicopathological factors are associated with axillary lymph node metastasis in invasive ductal breast carcinoma with sizes > 10 mm. MATERIALS AND METHODS: We evaluated 150 breast lesions from 148 patients using the above methods and the clinicopathological factors...
July 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28691320/use-of-ultrasound-shear-wave-elastography-to-evaluate-change-in-cervical-stiffness-during-pregnancy
#9
Tetsuo Ono, Daisuke Katsura, Kazutaka Yamada, Kaori Hayashi, Akiko Ishiko, Shunichiro Tsuji, Fuminori Kimura, Kentaro Takahashi, Takashi Murakami
AIM: The aim of this study was to evaluate the usefulness of shear-wave elastography (SWE) for measuring change in cervical stiffness during pregnancy, with regions of interest (ROI) designed for easy identification. METHODS: A total of 280 women were enrolled in this study. SWE was performed at a routine prenatal visit. A measurement area was chosen at the anterior part of the cervix, and a circular ROI 5 mm in diameter was set at two points, 5-10 mm (lower point) and 15-20 mm (upper point) from the external cervical os...
July 10, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28690935/acoustic-radiation-force-impulse-imaging-in-benign-and-malignant-breast-lesions
#10
Jayapriya Jayaraman, Venkatraman Indiran, Kanakaraj Kannan, Prabakaran Maduraimuthu
BACKGROUND: Elastography is a promising way to assess tissue differences regarding stiffness or elasticity, which has been historically assessed manually by palpation. Combined with conventional imaging modalities, shear wave elastography can potentially evaluate the stiffness of a breast lesion and consequently help detect malignant breast tumor from benign ones. The aim of this study was to evaluate the diagnostic role of shear wave elastography in breast lesions in the Indian population...
June 1, 2017: Curēus
https://www.readbyqxmd.com/read/28688156/comparison-and-combination-of-strain-and-shear-wave-elastography-of-breast-masses-for-differentiation-of-benign-and-malignant-lesions-by-quantitative-assessment-preliminary-study
#11
Mirinae Seo, Hye Shin Ahn, Sung Hee Park, Jong Beum Lee, Byung Ihn Choi, Yu-Mee Sohn, So Youn Shin
OBJECTIVES: To compare the diagnostic performance of strain and shear wave elastography of breast masses for quantitative assessment in differentiating benign and malignant lesions and to evaluate the diagnostic accuracy of combined strain and shear wave elastography. METHODS: Between January and February 2016, 37 women with 45 breast masses underwent both strain and shear wave ultrasound (US) elastographic examinations. The American College of Radiology Breast Imaging Reporting and Data System (BI-RADS) final assessment on B-mode US imaging was assessed...
July 8, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28684589/imaging-in-metabolic-research-adipose-tissue-and-liver
#12
Jesper Lundbom
Adipose tissue and liver are central tissues in whole body energy metabolism. Their composition, structure and function can be non-invasively imaged using a variety of measurement techniques, which provide a safe alternative to an invasive biopsy. Imaging of adipose tissue is focused on quantitating the distribution of adipose tissue in subcutaneous and intra-abdominal (visceral) adipose tissue depots. Also detailed subdivisions of adipose tissue can be distinguished with modern imaging techniques. Adipose tissue accumulation or infiltration of other organs can also be imaged...
July 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28684232/acute-effect-and-time-course-of-extension-and-internal-rotation-stretching-of-the-shoulder-on-infraspinatus-muscle-hardness
#13
Ken Kusano, Satoru Nishishita, Masatoshi Nakamura, Hiroki Tanaka, Jun Umehara, Noriaki Ichihashi
BACKGROUND: A decrease in flexibility of the infraspinatus muscle causes limitations in the range of shoulder motion. Static stretching (SS) is a useful method to improve muscle flexibility and joint mobility. Previous researchers investigated effective stretching methods for the infraspinatus. However, few researchers investigated the acute effect of SS on the infraspinatus muscle's flexibility. In addition, the minimum SS time required to increase the infraspinatus muscle's flexibility remains unclear...
July 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28680900/semitendinosus-tendon-for-acl-reconstruction-regrowth-and-mechanical-property-recovery
#14
Stephen M Suydam, Daniel H Cortes, Michael J Axe, Lynn Snyder-Mackler, Thomas S Buchanan
BACKGROUND: Semitendinosus/gracilis (STG) tendon autograft has been used effectively for restoring knee stability after anterior cruciate ligament (ACL) rupture. Though ACL reconstruction with STG autograft is an effective surgical technique for return to sports, short-term hamstring strength asymmetries exist after surgery. Although imaging evidence has demonstrated regrowth and reorganization of the semitendinosus (ST) tendon, no studies show whether the regrowth is associated with residual muscle function...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28673478/comparing-performance-of-combinations-of-shear-wave-elastography-and-b-mode-ultrasound-in-diagnosing-breast-masses-is-it-influenced-by-mass-size
#15
Rui Cong, Jing Li, Xuejiao Wang
We determined the diagnostic performance of combinations of shear wave elastography (SWE) and B-mode ultrasound (US) in differentiating malignant from benign breast masses, and we investigated whether performance is affected by mass size. In this prospective study of 315 consecutive patients with 326 breast masses, US and SWE were performed before biopsy. Masses were categorized into two subgroups on the basis of mass size (≤15 mm and >15 mm), and the optimal thresholds for the SWE parameters were determined for each subgroup using receiver operating characteristic curves...
June 30, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28666550/evaluation-of-antivascular-combretastatin-a4-p-efficacy-using-supersonic-shear-imaging-technique-of-ectopic-colon-carcinoma%C3%A2-ct26
#16
Johanne Seguin, Nathalie Mignet, Heldmuth Latorre Ossa, Mickaël Tanter, Jean-Luc Gennisson
A recent ultrasound imaging technique-shear wave elastography-showed its ability to image and quantify the mechanical properties of biological tissues, such as prostate or liver tissues. In the present study this technique was used to evaluate the relationship among tumor growth, stiffness and reduction of treatment with combretastatin (CA4 P) in allografted colon tumor CT26 in mice. During 12 d, CT26 tumor growth (n = 52) was imaged by ultrasound, and shear modulus was quantified, showing a good correlation between tumor volume and stiffness (r = 0...
June 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28659191/an-ultrasound-transient-elastography-system-with-coded-excitation
#17
Xianfen Diao, Jing Zhu, Xiaonian He, Xin Chen, Xinyu Zhang, Siping Chen, Weixiang Liu
BACKGROUND: Ultrasound transient elastography technology has found its place in elastography because it is safe and easy to operate. However, it's application in deep tissue is limited. The aim of this study is to design an ultrasound transient elastography system with coded excitation to obtain greater detection depth. METHODS: The ultrasound transient elastography system requires tissue vibration to be strictly synchronous with ultrasound detection. Therefore, an ultrasound transient elastography system with coded excitation was designed...
June 28, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28657192/the-effects-of-age-and-pathology-on-shear-wave-speed-of-the-human-rotator-cuff
#18
Timothy G Baumer, Jack Dischler, Leah Davis, Yassin Labyed, Daniel S Siegal, Marnix van Holsbeeck, Vasilios Moutzouros, Michael J Bey
Rotator cuff tears are common and often repaired surgically, but post-operative repair tissue healing and shoulder function can be unpredictable. Tear chronicity is believed to influence clinical outcomes, but conventional clinical approaches for assessing tear chronicity are subjective. Shear wave elastography (SWE) is a promising technique for assessing soft tissue via estimates of shear wave speed (SWS), but this technique has not been used extensively on the rotator cuff. Specifically, the effects of age and pathology on rotator cuff SWS are not well known...
June 28, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28654854/viscoelastic-power-law-parameters-of-in-vivo-human-brain-estimated-by-mr-elastography
#19
J Testu, M D J McGarry, F Dittmann, J B Weaver, K D Paulsen, I Sack, E E W Van Houten
The noninvasive imaging technique of magnetic resonance elastography (MRE) was used to estimate the power law behavior of the viscoelastic properties of the human brain in vivo. The mechanical properties for four volunteers are investigated using shear waves induced over a frequency range of 10-50Hz to produce a displacement field measured by magnetic resonance motion-encoding gradients. The average storage modulus (μR) reconstructed with non-linear inversion (NLI) increased from approximately 0.95 to 2.58kPa over the 10-50Hz span; the average loss modulus (μI) also increased from 0...
June 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28651307/role-of-shear-wave-elastography-in-evaluating-the-risk-of-hepatocellular-carcinoma-in-patients-with-chronic-hepatitis-b
#20
Jae Yoon Jeong, Joo Hyun Sohn, Won Sohn, Chan Hyuk Park, Tae Yeob Kim, Dae Won Jun, Yongsoo Kim, Woo Kyoung Jeong
Background/Aims: To investigate the use of measurements of liver stiffness (LS) by two-dimensional real-time shear wave elastography (SWE) for predicting the development of hepatocellular carcinoma (HCC) in patients with chronic hepatitis B (CHB). Methods: We retrospectively collected data on 291 enrolled patients with CHB whose LS had been measured using SWE. Results: The mean age of the patients was 46.8 years; males predominated (67%), and 40 of the patients (14%) had clinical cirrhosis...
June 27, 2017: Gut and Liver
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