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Shear wave elastography

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https://www.readbyqxmd.com/read/30343557/clinical-utilization-of-shear-wave-elastography-in-the-musculoskeletal-system
#1
Leah C Davis, Timothy G Baumer, Michael J Bey, Marnix van Holsbeeck
Shear wave elastography (SWE) is an emerging technology that provides information about the inherent elasticity of tissues by producing an acoustic radiofrequency force impulse, sometimes called an "acoustic wind," which generates transversely-oriented shear waves that propagate through the surrounding tissue and provide biomechanical information about tissue quality. Although SWE has the potential to revolutionize bone and joint imaging, its clinical application has been hindered by technical and artifactual challenges...
August 23, 2018: Ultrasonography
https://www.readbyqxmd.com/read/30342781/placental-elasticity-as-a-new-non-invasive-predictive-marker-of-pre-eclampsia
#2
Yasuyuki Fujita, Takako Ohmaru Nakanishi, Maiko Sugitani, Kiyoko Kato
Point shear wave elastography is an ultrasonography technique used to evaluate tissue elasticity. We examined whether placental elasticity is useful for predicting the onset of pre-eclampsia. Two hundred twenty-one participants were divided into two groups: one group at low risk (n = 185) and the other at high risk (n = 36) for pre-eclampsia. The two groups were compared with respect to shear wave velocity (SWV) of the placenta. Use of SWV as a predictor of pre-eclampsia was also investigated by creating a receiver operating characteristic (ROC) curve...
October 17, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/30342780/quantitative-elastography-of-rectal-lesions-the-value-ofshear-wave-elastography-in-identifying-benign-and-malignant-rectal-lesions
#3
Tingting Li, Man Lu, Yuan Li, Juan Li, Ziyue Hu, Xu Li, Xueqing Cheng, Jingzhen Jiang, Bo Tan
We evaluate the value of shear wave elastography (SWE) in diagnosing benign and malignant rectal lesions. A total of 96 lesions were reviewed in this study; endorectal ultrasound (ERUS) and SWE examinations were performed before surgery in all cases. Elasticity parameters including mean elastographic index (Emean ), maximum elastographic index (Emax ) and minimum elastographic index (Emin ) were analyzed. Correlations between elastographic parameters and histopathological results were studied. Inter-observer and intra-observer agreement was analyzed...
October 17, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/30342491/shear-wave-elastography-in-the-evaluation-of-level-vi-lymph-nodes-in-papillary-thyroid-carcinoma-combined-with-gray-scale-ultrasound-ex-vivo
#4
Wanying Chang, Lei Tang, Caiwei Lu, Min Wu, Man Chen
BACKGROUND: The evaluation of cervical lymph nodes is very important for patients with papillary thyroid carcinoma (PTC). Conventional ultrasound is recommended to assess the status of cervical lymph nodes but the diagnostic performance is not satisfying especially in level VI lymph nodes. Recently, shear wave elastography has shown great potential in diagnosis. Therefore, this study aimed at exploring the value of shear wave elastography in ultrasound evaluation for level VI lymph nodes in papillary thyroid carcinoma...
October 20, 2018: BMC Cancer
https://www.readbyqxmd.com/read/30340245/intraoperative-shear-wave-elastography-vs-contrast-enhanced-ultrasound-for-the-characterization-and-differentiation-of-focal-liver-lesions-to-optimize-liver-tumor-surgery
#5
Natascha Platz Batista da Silva, Matthias Hornung, Lukas P Beyer, Christina Hackl, Stefan Brunner, Hans Jürgen Schlitt, Philipp Wiggermann, Ernst Michael Jung
PURPOSE:  Assessment of intraoperative quantitative shear wave elastography (SWE) and contrast-enhanced ultrasound (CEUS) for the characterization of focal liver lesions (FLLs) during liver surgery using postoperative histopathological results as the gold standard. MATERIALS AND METHODS:  US data of 79 consecutive patients with 98 FLLs who underwent liver surgery between 08/2015 - 06/2017 were prospectively acquired and retrospectively analyzed. Multifrequency linear/T-shaped probes (6 - 9 MHz) were used to store cine loops of at least 5 s and images of B-mode, SWE and CEUS...
October 19, 2018: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/30324296/can-contrast-enhanced-ultrasound-and-acoustic-radiation-force-impulse-imaging-characterize-ct-indeterminate-renal-masses-a-prospective-evaluation-with-histological-confirmation
#6
Wolfgang M Thaiss, Jens Bedke, Stephan Kruck, Daniel Spira, Arnulf Stenzl, Konstantin Nikolaou, Marius Horger, Sascha Kaufmann
PURPOSE: To prospectively characterize computed tomography (CT)-indeterminate renal masses (CTIRM) using acoustic radiation force impulse (ARFI) elastography and contrast-enhanced ultrasound (CEUS) and to correlate quantitative imaging findings with histopathology or interim follow-up (FU). METHODS: 123 patients with CTIRM (longest diameter < 4 cm) underwent ARFI and CEUS with CT image fusion (IF). Exclusion criteria included all contraindications for CEUS and IF...
October 15, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/30320562/guidelines-and-recommendations-on-the-clinical-use-of-shear-wave-elastography-for-evaluating-thyroid-nodule1
#7
Hui-Xiong Xu, Kun Yan, Bo-Ji Liu, Wen-Ying Liu, Li-Na Tang, Qi Zhou, Jin-Yu Wu, En-Sheng Xue, Bin Shen, Qing Tang, Qin Chen, Hong-Yuan Xue, Ying-Jia Li, Jun Guo, Bin Wang, Fang Li, Chun-Yang Yan, Quan-Shui Li, Yan-Qing Wang, Wei Zhang, Chang-Jun Wu, Wen-Hui Yu, Su-Jin Zhou
Ultrasound elastography has been introduced into clinical practice for a decade and arisen continuous increasing attention worldwide. Shear wave elastography (SWE) is a further extension of ultrasound elastography on the basis of strain elastography, providing a two-dimensional distribution map of tissue stiffness and quantitative measurement of the tissue stiffness in Young's modulus (kPa) and/or shear wave speed (m/s). The Society of Ultrasound in Medicine, Chinese Medical Association (CMA) has recently released a series of guidelines for the use of SWE, including the technique and principle of SWE, and use of SWE in liver fibrosis, breast, thyroid, and musculoskeletal system...
October 10, 2018: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/30312358/viscoelastic-parameters-as-discriminators-of-breast-masses-initial-human-study-results
#8
Viksit Kumar, Max Denis, Adriana Gregory, Mahdi Bayat, Mohammad Mehrmohammadi, Robert Fazzio, Mostafa Fatemi, Azra Alizad
Shear wave elastography is emerging as a clinically valuable diagnostic tool to differentiate between benign and malignant breast masses. Elastography techniques assume that soft tissue can be modelled as a purely elastic medium. However, this assumption is often violated as soft tissue exhibits viscoelastic properties. In order to explore the role of viscoelastic parameters in suspicious breast masses, a study was conducted on a group of patients using shear wave dispersion ultrasound vibrometry in the frequency range of 50-400 Hz...
2018: PloS One
https://www.readbyqxmd.com/read/30310260/evaluation-of-elastography-combined-with-serological-indexes-for-hepatic-fibrosis-in-patients-with-chronic-hepatitis-b
#9
Bin Xu, Ning-Ming Zhou, Wei-Tian Cao, Xiao-Jing Li
AIM: To investigate the value of ultrasound elastography combined with serological indexes in diagnosing liver fibrosis and assessing its severity. METHODS: A total of 338 chronic hepatitis B (CHB) patients were divided into a disease group (patients with hepatic fibrosis) and control group (subjects without hepatic fibrosis). The disease group was further divided into S1-S4 according to the degree of fibrosis. Independent risk factors for hepatic fibrosis were analyzed using multivariate logistic regression...
October 7, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/30306712/predicting-post-operative-pancreatic-fistulae-using-preoperative-pancreatic-imaging-a-systematic-review
#10
REVIEW
Savio G Barreto, Ilse Dirkzwager, John A Windsor, Sanjay Pandanaboyana
BACKGROUND: Post-operative pancreatic fistulae (POPF) remain a major contributor to morbidity and mortality following pancreatic resection. Evidence for preoperative prediction of POPF based on cross-sectional imaging has not been systemically reviewed. This review aimed to determine whether preoperative imaging modalities can accurately predict the development of POPF. METHODS: A systematic review of major reference databases was undertaken, according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines, up to May 2018...
October 10, 2018: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/30303694/benign-lesion-evaluation-factors-causing-the-stiff-rim-sign-in-breast-tissues-using-shear-wave-elastography
#11
Lihua Xiang, Fang Ma, Minghua Yao, Guang Xu, Huan Pu, Hui Liu, Yan Fang, Rong Wu
OBJECTIVE: To investigate the factors causing the "stiff rim" sign in breast lesions using shear-wave elastography (SWE). METHODS: A total of 907 patients with 907 lesions were included retrospectively in this study. Traditional ultrasound (US) and shear-wave elastography (SWE) imaging were both performed. Patients age, maximum diameter, depth, distance, echogenicity, shape, boundary, margin, internal components, color doppler flow signal (CDFI), calcification, echogenicity attenuation and longitudinal growth of lesions were observed and calculated by both Univariate and Multivariate analyses...
October 10, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/30302041/evaluation-of-splenic-stiffness-in-patients-of-extrahepatic-portal-vein-obstruction-using-2d-shear-wave-elastography-comparison-with-intra-operative-portal-pressure
#12
Kumble S Madhusudhan, Ragini Kilambi, Shalimar, Sujoy Pal, Raju Sharma, Deep N Srivastava
Background/Aims: To compare splenic stiffness (SS) with intra-operative portal pressures (PPs) in patients of extrahepatic portal vein obstruction (EHPVO). Methods: Twenty-one patients (14 males; 7 females) of mean age 20.4 years with clinical and sonographic diagnosis of EHPVO were included in this approved prospective study. Endoscopy for esophageal varices (EV) was done in all patients followed by ultrasonographic 2D shear wave elastography (SWE) of spleen. Three values were taken at different areas of spleen avoiding major vessels and mean was calculated...
September 2018: Journal of Clinical and Experimental Hepatology
https://www.readbyqxmd.com/read/30300323/quantitative-assessment-of-palatine-tonsils-in-healthy-children-and-adolescents-with-shear-wave-elastography
#13
Mehmet Öztürk, Emine Çalişkan, Zuhal Bayramoğlu, İbrahim Adaletli
The normal elasticity and velocity values for palatine tonsils (PTs) in healthy children and adolescents were defined using shear wave elastography, and the relationship with potential factors affecting these values was assessed. This prospective study included a total of 80 cases with ages ranging from 3 to 17 years. Sex, age, and body mass index (BMI) were recorded. Elasticity and velocity measurements of both PTs and the relationship with basic descriptive data were investigated. For statistical analyses, independent-samples t tests and Spearman ρ (r) correlation coefficient were used...
October 8, 2018: Ultrasound Quarterly
https://www.readbyqxmd.com/read/30296308/a-novel-3d-printed-mechanical-actuator-using-centrifugal-force-for-magnetic-resonance-elastography-initial-results-in-an-anthropomorphic-prostate-phantom
#14
Wiebke Neumann, Andreas Bichert, Jonas Fleischhauer, Antonia Stern, Roxana Figuli, Manfred Wilhelm, Lothar R Schad, Frank G Zöllner
This work demonstrates a new method for the generation of mechanical shear wave during magnetic resonance elastography (MRE) that creates greater forces at higher vibrational frequencies as opposed to conventionally used pneumatic transducers. We developed an MR-compatible pneumatic turbine with an eccentric mass that creates a sinusoidal centrifugal force. The turbine was assessed with respect to its technical parameters and evaluated for MRE on a custom-made anthropomorphic prostate phantom. The silicone-based tissue-mimicking materials of the phantom were selected with regard to their complex shear moduli examined by rheometric testing...
2018: PloS One
https://www.readbyqxmd.com/read/30296217/local-phase-velocity-based-imaging-lpvi-a-new-technique-used-for-ultrasound-shear-wave-elastography
#15
Piotr Kijanka, Matthew W Urban
Ultrasound shear wave elastography is an imaging modality for noninvasive evaluation of tissue mechanical properties. However, many current techniques overestimate lesions dimension or shape especially when small inclusions are taken into account. In this study we propose a new method called local phase velocity based imaging (LPVI) as an alternative technique to measure tissue elasticity. Two separate acquisitions with ultrasound push beams focused once on the left side and once on the right side of the inclusion were generated...
October 8, 2018: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/30291574/virtual-touch-iq-elastography-in-evaluation-of-achilles-tendon-in-patients-with-chronic-renal-failure
#16
Emrah Caglar, Ibrahim Ilker Oz, Serkan Guneyli, Muammer Bilici, Fatih Yılmaz, Sevil Uygun Ilikhan, Ali Borazan
PURPOSE: To evaluate the sonoelastographic changes in the Achilles tendon in patients with chronic renal failure (CRF) using virtual touch imaging quantification (VTIQ) elastography. METHODS: Twenty-six patients undergoing three hemodialysis sessions per week and 26 subjects admitted to our institution between January 2016 and April 2016 were included in this prospective study. The characteristics and body mass index of the patients were noted. Ultrasonography was performed parallel to the long axis of the bilateral Achilles tendons during relaxation of the legs using the Siemens Acuson S3000™ ultrasound device (Siemens HealthCare, Erlangen, Germany)...
October 5, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/30288582/shear-wave-elastography-prior-to-transjugular-intrahepatic-portosystemic-shunt-may-predict-the-decrease-in-hepatic-vein-pressure-gradient
#17
Dina Attia, Thomas Rodt, Steffen Marquardt, Jan Hinrichs, Bernhard C Meyer, Michael Gebel, Frank Wacker, Michael P Manns, Andrej Potthoff
BACKGROUND: Transjugular intrahepatic portosystemic shunt (TIPS) is a procedure used to treat portal hypertension complications. Our aim was to evaluate liver and spleen stiffness measurement (LSM and SSM, respectively) changes using acoustic radiation force impulse imaging (ARFI) in comparison to Child-Pugh scores for predicting hepatic venous pressure gradient (HVPG) decreases after TIPS implantation. METHODS: This prospective study included 31 consecutive clinically significant portal hypertension patients with TIPS indication...
October 4, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/30286950/shear-wave-elastography-of-peripheral-muscle-weakness-in-patients-with-chronic-congestive-heart-failure
#18
Mariya Maslarska, Christoph Weis, Christoph Bode, Christoph Hehrlein
Forty-five study participants (28 chronic heart failure [CHF] patients and 17 control participants) were prospectively enrolled in this study to investigate the clinical potential of ultrasound shear wave elastography (SWE) in identifying peripheral muscle weaknesses in chronic heart failure patients. Muscle stiffness in the gastrocnemius muscle during extension (stretch) and the lower arm flexor muscles during flexion was assessed via shear wave elastography, measuring the shear modulus (kPa) for the resting and contractile states in a range of 0-300 kPa...
October 1, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/30276152/usefulness-of-shear-wave-elastography-in-the-diagnosis-of-oral-and-maxillofacial-diseases
#19
Ichiro Ogura, Ken Nakahara, Yoshihiko Sasaki, Mikiko Sue, Takaaki Oda
Purpose: To evaluate the usefulness of shear wave elastography in the diagnosis of oral and maxillofacial diseases. Materials and Methods: Ten patients with oral and maxillofacial diseases and 28 volunteers drawn from our student doctors were examined by shear wave elastography with a 14-MHz linear transducer using an Aplio 300 apparatus (Canon Medical Systems, Otawara, Japan). A statistical analysis of the shear elastic modulus (kPa) of healthy tissue (the sublingual gland, submandibular gland, anterior belly of the digastric muscle, and geniohyoid muscle) in the 28 volunteers was performed using 1-way repeated measures analysis of variance with the Tukey honest significant difference test...
September 2018: Imaging Science in Dentistry
https://www.readbyqxmd.com/read/30267166/performance-of-two-dimensional-ultrasound-shear-wave-elastography-reference-values-of-normal-liver-stiffness-in-children
#20
Paraskevi Galina, Efthymia Alexopoulou, Aglaia Zellos, Virginia Grigoraki, Tania Siahanidou, Nikolaos L Kelekis, Maria Zarifi
BACKGROUND: Two-dimensional (2-D) shear wave elastography is a new sonographic elastography method for noninvasive measurement of liver stiffness. OBJECTIVE: The aim of this study was to establish reference values of normal liver stiffness on 2-D shear wave elastography in children. MATERIALS AND METHODS: Two-dimensional shear wave elastography values were measured in 202 children with no liver disease from the neonatal period to puberty, who were divided into 4 age groups: newborns and infants, preschoolers, elementary school children and adolescents...
September 28, 2018: Pediatric Radiology
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