scholarly journals How to perform shear wave elastography. Part II

2021 ◽  
Author(s):  
Giovanna Ferraioli ◽  
Richard G Barr ◽  
André Farrokh ◽  
Maija Radzina ◽  
Xin Wu Cui ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Salivary Glands ◽  
Shear Wave ◽  
Endoscopic Ultrasound ◽  
Musculoskeletal System ◽  
Normal Values ◽  
Shear Wave Elastography ◽  
Strain Imaging ◽  
Future Developments ◽  
Examination Technique

Recently a series of papers was introduced describing on “how to do” certain techniques. More specifically we published on how to perform strain imaging using the transcutaneous and endoscopic ultrasound approach and shear wave elastography (SWE). In the first part we describe how to optimize the examination technique, discussing normal values, pitfalls, artefacts and specific tips for applying SWE to specific organs (liver, breast, thyroid, salivary glands) as part of a diagnostic US examination. In part II, the use of SWE in the pancreas, spleen, kidney, prostate, scrotum, musculoskeletal system, lymph nodes and future developments are discussed.

Noninvasive Assessment of Liver Diseases using 2D Shear Wave Elastography

2016 ◽  
Vol 25 (4) ◽  
pp. 525-532 ◽  
Author(s):  
Monica Lupșor-Platon ◽  
Radu Badea ◽  
Mirela Gersak ◽  
Anca Maniu ◽  
Ioana Rusu ◽  
...  
Keyword(s):  
Shear Wave ◽  
Predictive Value ◽  
Liver Diseases ◽  
Venous Pressure ◽  
Liver Stiffness ◽  
Shear Wave Elastography ◽  
Acoustic Radiation Force Impulse ◽  
Two Dimensional ◽  
Non Invasive ◽  
Examination Technique

There has been great interest in the development of non-invasive techniques for the diagnosis of liver fibrosis in chronic liver diseases, including ultrasound elastographic methods. Some of these methods have already been adequately studied for the non-invasive assessment of diffuse liver diseases. Others, however, such as two-dimensional Shear Wave Elastography (SWE), of more recent appearance, have yet to be validated and some aspects are for the moment incompletely elucidated. This review discusses some of the aspects related to two-dimensional SWE: the examination technique, the examination performance indicators, intra and interobserver agreement and clinical applications. Recommendations for a high-quality examination technique are formulated. Key words:  –  –  – Two-dimensional Shear Wave Elastography. Abbreviations: 2D- SWE: Two-dimensional Shear Wave Elastography; 3D- SWE: Three-dimensional Shear Wave Elastography; AUROC: area under the receiver operating characteristic curves; ARFI Acoustic Radiation Force Impulse Elastography; EFSUMB: European Federation of Societies for Ultrasound in Medicine and Biology; HVPG: hepatic venous pressure gradient; LS: liver stiffness; LR: likelihood ratio; NPV: negative predictive value; PPV: positive predictive value; ROI: region of interest; RT-E: Real Time-Elastography; Se: sensitivity; Sp: specificity; TE: Transient Elastography; US: ultrasound; VM: valid measurement; E: Young’s modulus

scholarly journals Multiparametric ultrasound diagnosis of metastatic and lymphoproliferative changes in lymph nodes in primary-multiple malignant tumors, including breast cancer and lymphoma

2019 ◽  
Vol 8 (4) ◽  
pp. 37-44 ◽  
Author(s):  
E. V. Kovaleva ◽  
T. Yu. Danzanova ◽  
G. T. Sinyukova ◽  
P. I. Lepedatu ◽  
E. A. Gudilina ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Differential Diagnosis ◽  
Lymph Nodes ◽  
Shear Wave ◽  
Malignant Tumors ◽  
Shear Wave Elastography ◽  
Doppler Imaging ◽  
Contrast Enhanced Ultrasound ◽  
Contrast Enhanced ◽  
Multiparametric Ultrasound

In this article, based on two clinical examples, the possibilities of multiparametric ultrasound in the differential diagnosis of metastatic and lymphoproliferative changes in lymph nodes in primary-multiple malignant tumors, including breast cancer and lym - phoma, are evaluated. Multiparameteric ultrasound includes B-mode, color and energy Doppler imaging, strain elastography, shear wave elastography and contrast-enhanced ultrasound (CEUS). Standardization and reproducibility of these ultrasound techniques will allow to objectify the study, obtaining specific indicators of shear wave velocity in the zones of interest and specific signs of contrast enhancement, which can be used as impor tant differential diagnostic tool in oncology.

scholarly journals Shear wave elastography in differentiating between benign and malignant cervical lymph nodes in patients with oral carcinoma

2019 ◽  
Vol 48 (6) ◽  
pp. 20180454 ◽  
Author(s):  
Yoshihiko Sasaki ◽  
Ichiro Ogura
Keyword(s):  
Elastic Modulus ◽  
Lymph Nodes ◽  
Shear Wave ◽  
Rank Correlation ◽  
Shear Wave Elastography ◽  
Oral Carcinoma ◽  
Cervical Lymph Nodes ◽  
Significance Level ◽  
Axial Diameter ◽  
Shear Elastic Modulus

Objectives: To evaluate shear wave elastography in differentiating between benign and malignant cervical lymph nodes in patients with oral carcinoma. Methods: 77 patients with oral squamous cell carcinoma were examined by B-mode and shear wave elastography with a 14 MHz linear transducer. The integrated shear wave elastography software allowed the operator to place regions of interest of various sizes within the elastography window, and automatically displayed shear elastic modulus data (kPa) for each region of interest. The relationship between size and shear elastic modulus of cervical lymph nodes was assessed by Pearson's rank correlation test. The shear elastic modulus of cervical lymph nodes in benign and malignant were evaluated using the Mann–Whitney U test. The analyses were used with a 5% significance level. Results: We plotted shear elastic modulus (X) against minimal axial diameter of cervical lymph nodes (Y), and observed a significant correlation [ Y = 0.091 X + 4.648 (R2 = 0.603, p = 0.000, N = 77)]. Furthermore, the shear elastic modulus of the malignant cervical lymph nodes (105.9 ± 5.2 kPa) was higher than that of benign (11.9 ± 4.4 kPa, p = 0.000). Conclusions: The shear wave elastography is an effective technique for the objectively and quantitatively diagnosis of cervical lymph node metastases of the oral carcinoma.

The value of quantitative shear wave elastography in differentiating the cervical lymph nodes in patients with thyroid nodules

2017 ◽  
Vol 45 (2) ◽  
pp. 251-259 ◽  
Author(s):  
Jun You ◽  
Juan Chen ◽  
Feixiang Xiang ◽  
Yue Song ◽  
Simai Khamis ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Shear Wave ◽  
Thyroid Nodules ◽  
Shear Wave Elastography ◽  
Cervical Lymph Nodes

scholarly journals The Role of Ultrasound and Shear-Wave Elastography in Evaluation of Cervical Lymph Nodes

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Jan Heřman ◽  
Zuzana Sedláčková ◽  
Tomáš Fürst ◽  
Jaromír Vachutka ◽  
Richard Salzman ◽  
...  
Keyword(s):  
Lymph Nodes ◽  
Shear Wave ◽  
Sensitivity And Specificity ◽  
Predictive Power ◽  
Shear Wave Elastography ◽  
Final Diagnosis ◽  
Neck Mass ◽  
Cervical Lymph Nodes ◽  
Axis Ratio ◽  
Ultrasound Parameters

Aim. To evaluate the prognostic value of ultrasound and shear-wave elastography (SWE) in diagnosing malignant cervical lymph nodes. Methods. A total of 99 patients with enlarged lymph nodes (99 lymph nodes presenting as a neck mass) were examined clinically with conventional ultrasound including Doppler examination and shear-wave elastography. The results of the examinations were compared with the final diagnosis. Results. There were 43 benign and 56 malignant lymph nodes in our cohort. Age and sex were significant predictors of malignancy. The standard ultrasound parameters—node size, long/short axis ratio, hilum, vascularization, and the presence of microcalcifications—were also statistically significant. Lymph node volume combined with age showed the best predictive power. The maximum stiffness found on SWE was also a significant predictor of malignancy. The combination of epidemiologic, classic ultrasound, and elastographic parameters yielded the highest sensitivity and specificity in the prediction of malignancy; however, the additional impact of elastographic parameters was low. Conclusion. A combination of epidemiologic and classic ultrasound parameters can discriminate between malignant and benign lymph nodes with satisfactory sensitivity and specificity. Examining the stiffness of lymph nodes by means of SWE does not add much new predictive power.

Ex Vivo Assessment of Sentinel Lymph Nodes in Breast Cancer Using Shear Wave Elastography

2015 ◽  
Vol 35 (2) ◽  
pp. 271-277 ◽  
Author(s):  
Fahrettin Kilic ◽  
Mehmet Velidedeoglu ◽  
Tulin Ozturk ◽  
Sedat Giray Kandemirli ◽  
Atilla Suleyman Dikici ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Lymph Nodes ◽  
Shear Wave ◽  
Ex Vivo ◽  
Shear Wave Elastography ◽  
Sentinel Lymph Nodes

Comparison of shear-wave velocities obtained with shear-wave elastography of various peripheral lymph nodes in healthy Beagles

2021 ◽  
Vol 82 (12) ◽  
pp. 981-987
Author(s):  
Kang Yu-rim ◽  
Lee Su-hyeon ◽  
Seo Im-mee ◽  
Ko Jae-un ◽  
Kim Jae-hwan ◽  
...  
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Shear Wave ◽  
Clinical Relevance ◽  
Interobserver Reliability ◽  
Shear Wave Elastography ◽  
The Other ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Peripheral Lymph

Abstract OBJECTIVE To compare shear-wave velocities (SWVs) with shear-wave elastography of various peripheral lymph nodes (LNs). ANIMALS 11 healthy Beagles. PROCEDURES For each dog, bilateral mandibular, medial retropharyngeal, superficial cervical, axillary, superficial inguinal, and popliteal LNs were evaluated with shear-wave elastography in sagittal and transverse scanning planes. Depth of each lymph node was recorded, and intra- and interobserver reliability was determined. RESULTS SWVs for all LNs were significantly higher in the sagittal scanning plane, compared with those in the transverse scanning plane. The SWV of the most superficial LN, the mandibular LN, was significantly higher, compared with that for the other LNs, except for the medial retropharyngeal LN. The SWV of the deepest LN, the medial retropharyngeal LN, was as high as that for the mandibular LN. Intra- and interobserver reliability was excellent. CONCLUSIONS AND CLINICAL RELEVANCE SWVs for normal peripheral LNs of Beagles may serve as a reference to compare with those for other breeds and diseased LNs. Scanning plane, LN depth, and interfering tissues between the LN and the transducer may affect SWV. Shear-wave elastography may not be operator dependent.

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