Results 211 to 220 of about 28,230 (268)
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Predictors of shear wave propagation speed assessed by shear wave elastography
European Heart Journal, 2022Abstract Background Cardiac shear wave elastography (SWE) is a novel ultrasound-based method that assesses the propagation speed of shear waves travelling in the myocardium induced by e.g. mitral valve closure (MVC).
S Bezy +7 more
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Shear‐wave birefringence and ultrasonic shear‐wave attenuation measurements
SEG Technical Program Expanded Abstracts 1988, 1988Extensive laboratory measurements of acoustic wave attenuation in rocks have been carried out in sonic and ultrasonic frequency ranges. Surprising strong ultrasonic shear wave attenuation values, even under high confining pressure, have led us to assume that shear wave birefringence could be responsible for such a behavior.
Nathalie M. Lucet, Pierre A. Tarif
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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1987
A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides
F, Cohen-Tenoudji +4 more
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A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides
F, Cohen-Tenoudji +4 more
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Shear Wave Imaging of Breast Tissue by Color Doppler Shear Wave Elastography
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2017Shear wave elastography is a distinctive method to access the viscoelastic characteristic of the soft tissue that is difficult to obtain by other imaging modalities. This paper proposes a novel shear wave elastography [color Doppler shear wave imaging (CD SWI)] for breast tissue.
Yoshiki Yamakoshi +5 more
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A reliability index of shear wave speed measurement for shear wave elastography
2015 IEEE International Ultrasonics Symposium (IUS), 2015Shear wave elastography is widely used for the noninvasive measurement of tissue stiffness. Assessing liver fibrosis, for example, by measuring shear wave propagation speed is gaining popularity. Elastography data, however, is often contaminated with low SNR and the results become unreliable. Quantification of the reliability of shear wave measurement,
null Kiwan Choi +3 more
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Shear wave transmissivity measurement by color Doppler shear wave imaging
Japanese Journal of Applied Physics, 2016Abstract Shear wave elastography is a useful method for evaluating tissue stiffness. We have proposed a novel shear wave imaging method (color Doppler shear wave imaging: CD SWI), which utilizes a signal processing unit in ultrasound color flow imaging in order to detect the shear wave wavefront in real time.
Yoshiki Yamakoshi +4 more
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Shear Wave Propagation in Rocks
Nature, 1971WE have demonstrated striking similarities in elastic wave propagation through rocks and single crystals in recent experiments. In particular, we find that two shear waves with displacements perpendicular to one another and with differing velocities are often propagated through rocks. This is illustrated in Fig.
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Journal of Applied Physics, 1972
The equation of motion and the stability conditions for cracks interacting with transversal waves and surface waves are given. Threshold conditions for crack propagation relate the crack to a critical duration of the pulse and a second condition gives a relation between initial pulse amplitude and crack length.
B. Steverding, S. H. Lehnigk
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The equation of motion and the stability conditions for cracks interacting with transversal waves and surface waves are given. Threshold conditions for crack propagation relate the crack to a critical duration of the pulse and a second condition gives a relation between initial pulse amplitude and crack length.
B. Steverding, S. H. Lehnigk
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European Journal of Gastroenterology & Hepatology, 2022
Objective We aimed to evaluate the agreement/accuracy of point shear-wave elastography (p-SWE) and 2D-shear-wave elastography (2D-SWE) for liver fibrosis staging using transient elastography (TE) as the reference. Methods This retrospective study analyzed data from people with ...
Flavia, Fernandes +8 more
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Objective We aimed to evaluate the agreement/accuracy of point shear-wave elastography (p-SWE) and 2D-shear-wave elastography (2D-SWE) for liver fibrosis staging using transient elastography (TE) as the reference. Methods This retrospective study analyzed data from people with ...
Flavia, Fernandes +8 more
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Abdominal Radiology, 2017
Chronic liver disease is a substantial world-wide problem. Its major consequence is increasing deposition of fibrous tissue within the liver leading to the development of cirrhosis with its consequences of portal hypertension, hepatic insufficiency, and hepatocellular carcinoma.
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Chronic liver disease is a substantial world-wide problem. Its major consequence is increasing deposition of fibrous tissue within the liver leading to the development of cirrhosis with its consequences of portal hypertension, hepatic insufficiency, and hepatocellular carcinoma.
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