Results 181 to 190 of about 1,446,746 (215)

Resolution of axial shear strain elastography

Physics in Medicine and Biology, 2006
The technique of mapping the local axial component of the shear strain due to quasi-static axial compression is defined as axial shear strain elastography. In this paper, the spatial resolution of axial shear strain elastography is investigated through simulations, using an elastically stiff cylindrical lesion embedded in a homogeneously softer ...
Arun, Thitaikumar, Raffaella, Righetti, Thomas A, Krouskop, Jonathan, Ophir   +3 more
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Adaptive Spectral Strain Estimators for Elastography

Ultrasonic Imaging, 2004
In conventional elastography, internal tissue deformations, induced by external compression applied to the tissue surface, are estimated by cross-correlation analysis of echo signals obtained before and after compression. Conventionally, strains are estimated by computing the gradient of estimated displacement.
S Kaisar, Alam, Frederic L, Lizzi, Tomy, Varghese, Ernest J, Feleppa, Sarayu, Ramachandran   +4 more
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Angular strain estimation method for elastography

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2007
In the conventional cross-correlation-based strain estimation, there is a trade-off between the interpolation accuracy and the computational requirement. On the other hand, the autocorrelation-based method does not need interpolation, but it cannot estimate the wide range of displacements for elastography.
Unmin, Bae, Yongmin, Kim
openaire   +2 more sources

A zero-crossing strain estimator for elastography

Ultrasound in Medicine & Biology, 2003
A novel zero-crossing tracking strain estimator (ZCT) has been developed for elastography. This technique is based on tracking the zero-crossings between the pre- and postcompression A-lines, and does not require global or adaptive A-line stretching. For multicompression elastography, ZCT can be implemented as a tracking scheme, where a temporal track ...
S, Srinivasan, J, Ophir
openaire   +2 more sources

US-Elastography for Breast Lesion Characterization: Prospective Comparison of US BIRADS, Strain Elastography and Shear wave Elastography

Ultraschall in der Medizin - European Journal of Ultrasound, 2020
Abstract Purpose To evaluate the diagnostic performance of strain elastography (SE) and 2 D shear wave elastography (SWE) and SE/SWE combination in comparison with conventional multiparametric ultrasound (US) with respect to improving BI-RADS classification results and differentiating benign and malignant breast lesions using a qualitative ...
Cantisani, Vito, David, Emanuele, Barr, Richard G, Radzina, Maija, de Soccio, Valeria, Elia, Daniela, De Felice, Carlo, Pediconi, Federica, Gigli, Silvia, Occhiato, Rossella, Messineo, Daniela, Fresilli, Daniele, Ballesio, Laura, D'Ambrosio, Ferdinando   +13 more
openaire   +3 more sources

A normalization method for axial-shear strain elastography

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010
The axial-shear strain distribution of soft tissue under load contains information useful for differentiating benign and malignant tumors. This paper describes a novel axial-shear strain normalization method. The algorithm builds on an existing normalization procedure for axial strain to map the shear strain values to the range [ -π/2, π/2].
Lujie, Chen, R James, Housden, Graham M, Treece, Andrew H, Gee, Richard W, Prager   +4 more
openaire   +2 more sources

Comparing the clinical application of strain elastography and shear wave elastography for the evaluation of lateral epicondylitis

Journal of Clinical Ultrasound, 2022
AbstractPurposeThis study aimed to compare the diagnostic performance of gray‐scale ultrasound (GSU), strain elastography (SE), and shear wave elastography (SWE) for lateral epicondylitis (LE).MethodsFrom November 2018 to March 2021, 87 common extensor tendons (CETs) of 70 patients were evaluated using elbow ultrasound.
Sujin Hong, Seok Hahn, Jisook Yi, Eun Joo Park, Jin‐Young Bang   +4 more
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Analysis of an Adaptive Strain Estimation Technique in Elastography

Ultrasonic Imaging, 2002
Elastography is based on the estimation of strain due to tissue compression or expansion. Conventional elastography involves computing strain as the gradient of the displacement (time-delay) estimates between gated pre- and postcompression signals.
S, Srinivasan, F, Kallel, R, Souchon, J, Ophir   +3 more
openaire   +2 more sources

Elastography and strain rate imaging of the gastrointestinal tract

European Journal of Radiology, 2014
Ultrasound based elastography of the gastrointestinal tract may be a useful approach to improved tissue characterisation. Distinguishing malignant lesions from benign may be one useful application. Monitoring of inflammatory bowel lesions for degree of inflammation or fibrosis would be another clinically useful tool.
R, Havre, O H, Gilja
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Shear Wave Elastography and Strain Elastography: a Study on a Phantom

2017
In this paper we present a preliminary comparative study of two types of ultrasound elastography techniques – Strain Elastography and Shear Wave Elastography. The latter is a novel method which create a quantitative 2D map of the tissue stiffness. The map is presented in absolute units (kPa).
Bartłomiej Pyciński, Jan Juszczyk, Rafał Obuchowicz   +2 more
openaire   +1 more source