Re: Shear Wave Ultrasound Elastography of the Prostate: Initial Results

2013 ◽  
Vol 189 (1) ◽  
pp. 229-229
Author(s):  
Steven A. Kaplan
Keyword(s):  
Shear Wave ◽  
Ultrasound Elastography ◽  
Initial Results

scholarly journals General advice in ultrasound based elastography of pediatric patients

2019 ◽  
Vol 21 (3) ◽  
pp. 315 ◽  
Author(s):  
Christoph F. Dietrich ◽  
Giovanna Ferraioli ◽  
Roxana Sirli ◽  
Alina Popescu ◽  
Ioan Sporea ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Shear Wave ◽  
Pediatric Patients ◽  
Transient Elastography ◽  
Three Dimensional ◽  
Shear Wave Elastography ◽  
Ultrasound Elastography ◽  
Strain Elastography ◽  
Initial Results ◽  
Current Report

Ultrasound elastography including transient elastography (TE), point shear wave elastography, (pSWE) and two (three)- dimensional shear wave elastography (2D-SWE) have been introduced mainly for the evaluation of the liver. All the techniques are also feasible for the examination of spleen, whereas pSWE and 2D-SWE can be used for the assessment of the pancreas, kidney, gastrointestinal tract and other organs. Strain elastography also plays a role for non-liver applications. The aim of the current report is to highlight unique features and techniques for the elastographic examinations in children and to report initial results in non-liver applications

scholarly journals Elastic Modulus and Elasticity Ratio of Malignant Breast Lesions with Shear Wave Ultrasound Elastography: Variations with Different Region of Interest and Lesion Size

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1015
Author(s):  
Antonio Bulum ◽  
Gordana Ivanac ◽  
Eugen Divjak ◽  
Iva Biondić Špoljar ◽  
Martina Džoić Dominković ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Shear Wave ◽  
Large Diameter ◽  
Small Diameter ◽  
Shear Wave Elastography ◽  
Lesion Size ◽  
Ultrasound Elastography ◽  
Breast Lesions ◽  
Malignant Breast ◽  
The Impact

Shear wave elastography (SWE) is a type of ultrasound elastography with which the elastic properties of breast tissues can be quantitatively assessed. The purpose of this study was to determine the impact of different regions of interest (ROI) and lesion size on the performance of SWE in differentiating malignant breast lesions. The study included 150 female patients with histopathologically confirmed malignant breast lesions. Minimal (Emin), mean (Emean), maximal (Emax) elastic modulus and elasticity ratio (e-ratio) values were measured using a circular ROI size of 2, 4 and 6 mm diameters and the lesions were divided into large (diameter ≥ 15 mm) and small (diameter < 15 mm). Highest Emin, Emean and e-ratio values and lowest variability were observed when using the 2 mm ROI. Emax values did not differ between different ROI sizes. Larger lesions had significantly higher Emean and Emax values, but there was no difference in e-ratio values between lesions of different sizes. In conclusion, when measuring the Emin, Emean and e-ratio of malignant breast lesions using SWE the smallest possible ROI size should be used regardless of lesion size. ROI size has no impact on Emax values while lesion size has no impact on e-ratio values.

The Role of Viscosity Estimation for Oil-in-gelatin Phantom in Shear Wave Based Ultrasound Elastography

2015 ◽  
Vol 41 (2) ◽  
pp. 601-609 ◽  
Author(s):  
Ying Zhu ◽  
Changfeng Dong ◽  
Yin Yin ◽  
Xin Chen ◽  
Yanrong Guo ◽  
...  
Keyword(s):  
Shear Wave ◽  
Ultrasound Elastography

scholarly journals Ultrasound Elastography: another piece in the puzzle of carotid plaque vulnerability?

2021 ◽  
Author(s):  
Andjoli Davidhi ◽  
Vasileios Rafailidis ◽  
Evangelos Destanis ◽  
Panos Prassopoulos ◽  
Stefanos Foinitsis
Keyword(s):  
Shear Wave ◽  
Carotid Plaque ◽  
Diagnostic Yield ◽  
Imaging Modality ◽  
Shear Wave Elastography ◽  
Ultrasound Elastography ◽  
Intraplaque Hemorrhage ◽  
Plaque Vulnerability ◽  
Carotid Plaques ◽  
Increased Risk

Recent literature has shown that various carotid plaque features, other than stenosis, contribute to plaque vulnerability. Features such as surface morphology and plaque composition with distinct components (e.g. intraplaque hemorrhage, lipid core) have been associated with the increased risk of future cerebrovascular events. Ultrasonography constitutes the first line modality for the assessment of carotid disease and has traditionally been used to grade stenosis with high accuracy. Recenttechnological advances such as contrast-enhanced ultrasound and elastography increased the diagnostic yield of ultrasound in assessing the morphology of carotid plaques. The purpose of this review is to present the available literature on ultrasound elastography of the atherosclerotic carotid. Strain and shear wave elastography allow for the characterization of plaque components, thus indicating its nature and importantly, the plaque’s vulnerability. Shear wave elastography indices appear morerobust than Strain indices. Overall, elastography is a feasible method to distinguish vulnerable carotid plaques. There is, however, a need for larger and longer prospective controlled clinical studies in order to validate elastography as an imaging modality used for the detection of unstable carotid plaques.

scholarly journals Successful experience in the use of ultrasound elastography in the differentiating of lymphomatous and metastatic superficial lymphadenopathy

2020 ◽  
Vol 15 (2) ◽  
pp. 42-48
Author(s):  
E. V. Kovaleva ◽  
T. Yu. Danzanova ◽  
G. T. Sinyukova ◽  
E. A. Gudilina ◽  
P. I. Lepedatu ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Area Ratio ◽  
Ultrasound Elastography ◽  
Acoustic Radiation Force Impulse ◽  
Tissue Imaging ◽  
Hodgkin's Lymphomas

The objective: to evaluate the possibilities of ARFI technology (Acoustic Radiation Force Impulse), including Virtual Touch™ Tissue Imaging (VTI) and Virtual Touch™ Tissue Quantification (VTQ) for differentiation of lymphomatous and metastatic superficial lymphadenopathy.Materials and methods. The prospective study included 138 patients with enlarged superficial lymph nodes (LN). Based on a previous histological examination, patients were divided into two groups: 1st group (n = 108) – patients with non-Hodgkin’s lymphomas and Hodgkin’s lymphoma; 2nd group (n = 30) – patients with metastasis of solid tumors in superficial LN. All patients underwent ultrasound elastography of the enlarged LN using ARFI technology. In VTI study the Area Ratio parameter was evaluated, and the minimum and average values of the shear wave velocity were estimated in VTQ study.Results. According to the results of VTI study the Area Ratio parameter for enlarged LN in lymphoma (1st group) and for metastatic lymphadenopathy (2 nd group) were 1.031 ± 0.197 and 0.851 ± 0.15, respectively (p = 0.000009). The cut off value of the Area Ratio parameter was 0.901 with sensitivity, specificity and accuracy 80.6, 70.0 and 78.8 %, respectively. Minimum values of shear wave velocities for 1st and 2 nd groups were 1.980 ± 0.557 and 2.214 ± 0.367 m/s, respectively (p = 0.032). The cut off values of the average shear wave velocity in the differentiating of lymphomatous and metastatic lymphadenopathy are determined at the level of 2.00 m/s, with sensitivity of 70.0 %, specificity of 59.3 %, and accuracy of 61.6 %.Conclusion. Ultrasound elastography with ARFI technology demonstrated statistically significant differences in the Area Ratio parameter and in the minimum shear wave velocity in the enlarged superficial LN in lymphoma and with metastasis that can be used as a preliminary non-invasive differential diagnosis of enlarged superficial LN in these conditions. Moreover, the Area Ratio parameter has a statistically more significant effect on differentiating of lymphomatous and metastatic lymphadenopathy.

scholarly journals Real-Time Shear Wave Ultrasound Elastography Differentiates Fibrotic from Inflammatory Strictures in Patients with Crohn’s Disease

2018 ◽  
Vol 24 (10) ◽  
pp. 2183-2190 ◽  
Author(s):  
Yu-jun Chen ◽  
Ren Mao ◽  
Xue-hua Li MD ◽  
Qing-hua Cao ◽  
Zhi-hui Chen ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Real Time ◽  
Shear Wave ◽  
Ultrasound Elastography
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