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156 results for “Shear wave”
A Multicenter Cross-sectional Study of Shear Wave Ultrasound Imaging in Evaluating Supraspinatus Tendon Elasticity
ClinicalTrials.gov study NCT05769712. IPD Sharing: NO. Countries: 1. Publications: 6.
Comparison of Intraneural and Extraneural Young's Modulus Using Shear Wave Elastography
ClinicalTrials.gov study NCT01903369. IPD Sharing: Not stated. Countries: 1. Publications: 9.
Endosonographic Shear Wave Elastography to Assess Liver and Splenic Fibrosis
ClinicalTrials.gov study NCT06867731. IPD Sharing: NO. Countries: 1. Publications: 1.
Comparison of Ultrasound-guided Electrolysis Therapy vs. Sham Electrolysis in Patients With Patellar Tendinopathy: A Prospective Randomized Study Including MRI and Shear-wave Ultrasound Elastography I
ClinicalTrials.gov study NCT06939491. IPD Sharing: YES. Countries: 1. Publications: 21.
Endosonographic Shear Wave Elastography for Liver Stiffness
ClinicalTrials.gov study NCT04533932. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Seasonal particle responses to near-bed shear stress in a shallow, wave- and current-driven environment
Open the record for dataset details and reuse information.
Data from: Utility of real-time shear wave elastography in the assessment of testicular torsion
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Shear wave splitting measurements used in "Spatio-temporal Analysis of Seismic Anisotropy Associated with the Cook Strait and Kaikoura Earthquake Sequences in New Zealand"
<p>Shear wave splitting measurement used in "Spatio-temporal Analysis of Seismic Anisotropy Associated with the Cook Strait and Kaikoura Earthquake Sequences in New Zealand" is included here. This CSV and XLSX file are part of a paper submitted to GJI in April 2020. A detailed description of the column headers can be found in the MFAST manual, in table 4, at http://mfast-package.geo.vuw.ac.nz/mfast_manual_v2.2.pdf</p>
Ultrasonic shear-wave waveform dataset in siltstones, dolomites and a sandstone
<p>These data are the shear-wave waveform data obtained by Ba et al. (2012-2018) through ultrasonic experimental measurements on the three sets of rock samples, including twelve siltstone samples, five dolomites, and one tight sandstone.</p> <p>Details are given in the uploaded introduction document regarding the format of dataset.</p>
Data from: Combination of shear-wave elastography and color Doppler: feasible method to avoid unnecessary breast excision of fibroepithelial lesions diagnosed by core needle biopsy
Background: We evaluated shear-wave elastography (SWE) and color Doppler ultrasonography (US) features for fibroepithelial lesions (FELs), and to evaluate their utility to differentiate fibroadenomas (FAs) and phyllodes tumors (PTs). Methods: This retrospective study included 67 FELs pathologically confirmed (49 FAs, 18 PTs). B-mode US, SWE and color Doppler US were performed for each lesion. Mean elasticity (Emean), maximum elasticity (Emax), and vascularity were determined by SWE and Doppler US. Diagnostic performances were calculated to differentiate FAs and PTs. Equivocal FELs diagnosed by core needle biopsy (CNB) were further analyzed. Results: Median Emean and Emax were significantly lower for FAs than PTs (Emean, 15.7 vs. 66.7 kPa; Emax, 21.0 vs. 76.7 kPa, P<0.01). Low vascularity (0-1 vessel flow) on color Doppler US were more frequent in FAs than in PTs (P<0.01). SWE showed significantly higher specificities (Emean >43.9 kPa, 89.8%; Emax >46.1 kPa, 79.6%) than B-mode US (42.9%) (P<0.01) for differentiating PTs from FAs. Other diagnostic values of SWE and overall diagnostic values of Doppler US were not significantly different from B-mode US (P>0.05). The combination of SWE and Doppler US with 'Emean>43.9 kPa or high vascularity (≥2 vessel flows)' showed a higher area under the curve (0.786 vs. 0.687) and higher diagnostic values than B-mode US (sensitivity, 100 vs. 94.4 %; specificity, 57.1 vs. 42.9 %; positive predictive value, 46.2 vs. 37.8 %; negative predictive value, 100 vs. 95.5 %), without statistical significance (P>0.05). Of the 30 equivocal FELs, all lesions with 'Emean≤43.9 kPa and low vascularity (0-1 vessel flow)' (23.3%, 7/30) were finally confirmed as FAs by excision. Conclusion: FAs have a tendency to have less stiffness and lower vascularity than PTs. Combined SWE and color Doppler US may help patients with equivocal FELs diagnosed by CNB avoid unnecessary excision.
Shear-wave splitting measurements in the Dead Sea rift
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3-D Shear Wave Velocity (Vs) & Crustal Interface (Sediment Basement & Moho) Models of Borneo, Makassar Strait, & Sulawesi Region
<p>An update version of 3-D Shear Wave Velocity (Vs) & Crustal Interface (Sediment Basement & Moho) Models of Borneo, Makassar Strait and Sulawesi region obtained from group velocity tomography. Group velocity is retrieved from dispersion analysis of Rayleigh waves extracted from the ambient noise field by cross-correlating long-term recordings from 108 seismic stations over a period of 8 months (the stacked cross-correlations data are included). A 3-D shear wave velocity model then are produced via a two-stage process in which group velocity maps are computed across a range of periods and then sampled over a dense grid of points to produce pseudo-dispersion curves; these dispersion curves are then separately inverted for 1-D shear wave velocity (Vs), with the resultant models combined and interpolated to form a 3-D model.</p>
Particle velocity shear wave motion data for numerical tissue−like viscoelastic materials
<p>This repository contains the particle velocity shear wave motion data generated using the staggered grid finite difference method. These datasets were used to create images in article:</p> <p>Osika, Mariusz, and Piotr Kijanka. "Ultrasound Shear Wave Propagation Modeling in General Tissue–Like Viscoelastic Materials." <em>Ultrasound in Medicine & Biology</em> 50.4 (2024): 627-638.</p> <p>Each dataset contains shear wave motion waveforms, space and time vectors. </p>
Replication Package: 3D Shear‐wave Velocity and Density Modelling of the Northern Cascadia Subduction Zone
<p>This work is done as part of the <a href="https://metrovanmicromap.ca/" target="_blank" rel="noopener noreferrer">Metro Vancouver Seismic Microzonation Project</a> which aims to improve our understanding of seismic hazards in the Georgia Basin and explore opportunities to reduce their impact through mitigation.<br><br>Accurate shear wave velocity images of the subsurface is required to achieve this, hence we developed a new 3D shear-wave velocity (Vs) model for the region from ambient seismic noise and earthquake data recorded by temporary and permanent seismic stations in the last two decades as well as a new 3D density model from a publicly available gravity dataset.<br><br>Here, we share a replication package that includes datasets (seismic and gravity), computer codes and scripts adopted and developed for this research work. The package also includes intermediate result files and final 3D models and GMT script used to plot each figure in the associated manuscript (Submitted to JGR Solid Earth). Our goal is to support research transparency and reproducibility of our work.</p>
Shear Wave Velocity of New Zealand's South Island (unconstrained version)
<p>Crust and mantle 3-D shear velocity model extending well offshore of New Zealand’s South Island, imaging the lithosphere beneath the South Island as well as the Campbell and Challenger Plateaus. Our model is constructed via linearized inversion of both teleseismic (18–70 s period) and ambient noise-based (8–25 s period) Rayleigh wave dispersion measurements. We augment an array of 4 land-based and 29 ocean bottom instruments deployed off the South Island’s east and west coasts in 2009–2010 by the Marine Observations of Anisotropy Near Aotearoa experiment with 28 land-based seismometers from New Zealand’s permanent GeoNet array.</p> <p>This model is completely unconstrained (all layers are allowed to vary equally). The "Moho" model using Moho depth constraints obtained from the model of Salmon et al. (2011) can be found under 'Shear Wave Velocity of New Zealand's South Island (Moho version)'.</p>
Using shear-wave elastography in skeletal muscle: data repository of a reliability study
<p>This repository contains raw data from experiments investigating the reliability of shear-wave<br> elastography (SWE) to assess muscle stiffness. The first dataset contains meat specimen experiments (using<br> porcine meat specimens). The second and third datasets contain the measurements of human<br> subjects, performed on the first and second visit to the laboratory, respectively. All values are in<br> kilopascals (kPa). This experiment showed that SWE is a reliable tool for assessing muscle stiffness,<br> when the probe pressure is kept constant and the muscle is examined in relaxed condition.</p>
Liver Fibrosis Evaluation Using Ultrasound Shear Wave Imaging
ClinicalTrials.gov study NCT03637959. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The Efficacy of Shear-wave Elastography-guided Aspiration and Biopsy for Diagnosis in Lung Tumor
ClinicalTrials.gov study NCT03881410. IPD Sharing: YES. Countries: 1. Publications: 0.
Ultrasound Shear Wave Elastography in Parkinson's Disease
ClinicalTrials.gov study NCT06701318. IPD Sharing: Not stated. Countries: 0. Publications: 12.
Shear Wave Elastography Versus Strain Elastography With Histogram Analysis in Solid Pancreatic Lesions
ClinicalTrials.gov study NCT05448729. IPD Sharing: YES. Countries: 0. Publications: 1.
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OpenNeuro
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