Diagnostic performance of endoscopic ultrasonography‐guided elastography for solid pancreatic lesions: Shear‐wave measurements versus strain elastography with histogram analysis

2020 ◽  
Author(s):  
Eizaburo Ohno ◽  
Hiroki Kawashima ◽  
Takuya Ishikawa ◽  
Tadashi Iida ◽  
Hirotaka Suzuki ◽  
...  
Keyword(s):  
Shear Wave ◽  
Endoscopic Ultrasonography ◽  
Diagnostic Performance ◽  
Histogram Analysis ◽  
Strain Elastography ◽  
Wave Measurements ◽  
Versus Strain

Shear wave versus strain elastography of breast lesions—The value of incorporating boundary tissue assessment

2022 ◽  
Vol 82 ◽  
pp. 228-233
Author(s):  
Ian Wei Ming Tay ◽  
Llewellyn Shao-jen Sim ◽  
Tammy Hui Lin Moey ◽  
Karen Pei Pei Tan ◽  
Lily Mei San Lai ◽  
...  
Keyword(s):  
Shear Wave ◽  
Breast Lesions ◽  
Wave Versus ◽  
Strain Elastography ◽  
Versus Strain

scholarly journals Shear wave versus strain elastography in the differentiation of benign and malignant breast lesions

2019 ◽  
Vol 49 (5) ◽  
pp. 1509-1517 ◽  
Author(s):  
Aykut GÜRÜF ◽  
Mesut ÖZTÜRK ◽  
İlkay Koray BAYRAK ◽  
Ahmet Veysel POLAT
Keyword(s):  
Shear Wave ◽  
Breast Lesions ◽  
Wave Versus ◽  
Strain Elastography ◽  
Malignant Breast ◽  
Versus Strain

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

2020 ◽  
Author(s):  
Vito Cantisani ◽  
Emanuele David ◽  
Richard G. Barr ◽  
Maija Radzina ◽  
Valeria de Soccio ◽  
...  
Keyword(s):  
Shear Wave ◽  
Diagnostic Performance ◽  
Color Doppler ◽  
Shear Wave Elastography ◽  
Strain Ratio ◽  
Breast Lesions ◽  
Strain Elastography ◽  
Prospective Comparison ◽  
Malignant Breast ◽  
Sensitivity Specificity

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 and quantitative assessment. Materials and Methods In this prospective study, 130 histologically proven breast masses were evaluated with baseline US, color Doppler ultrasound (CDUS), SE and SWE (Toshiba Aplio 500 with a 7–15 MHz wide-band linear transducer). Each lesion was classified according to the BIRADS lexicon by evaluating the size, the B-mode and color Doppler features, the SE qualitative (point color scale) and SE semi-quantitative (strain ratio) methods, and quantitative SWE. Histological results were compared with BIRADS, strain ratio (SR) and shear wave elastography (SWE) all performed by one investigator blinded to the clinical examination and mammographic results at the time of the US examination. The area under the ROC curve (AUC) was calculated to evaluate the diagnostic performance of B-mode US, SE, SWE, and their combination. Results Histological examination revealed 47 benign and 83 malignant breast lesions. The accuracy of SR was statistically significantly higher than SWE (sensitivity, specificity and AUC were 89.2 %, 76.6 % and 0.83 for SR and 72.3 %, 66.0 % and 0.69 for SWE, respectively, p = 0.003) but not higher than B-mode US (B-mode US sensitivity, specificity and AUC were 85.5 %, 78.8 %, 0.821, respectively, p = 1.000). Conclusion Our experience suggests that conventional US in combination with both SE and SWE is a valid tool that can be useful in the clinical setting, can improve BIRADS category assessment and may help in the differentiation of benign from malignant breast lesions, with SE having higher accuracy than SWE.

scholarly journals Accuracy of shear wave elastography in characterization of thyroid nodules in children and adolescents

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Mohammed Hazem ◽  
Ossama M. Zakaria ◽  
Mohamed Yasser Ibrahim Daoud ◽  
Ibrahim Khalid Al Jabr ◽  
Abdulwahab A. AlYahya ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Shear Wave ◽  
Diagnostic Performance ◽  
Thyroid Nodules ◽  
Shear Wave Elastography ◽  
Invasive Technique ◽  
Predictive Values ◽  
Patients Âgés ◽  
Non Invasive

Abstract Background Thyroid nodules are an important health problem in children and adolescents. They possess a higher risk of malignancy in comparison to adults. This fact forms a great dilemma for clinicians. The aim of this study was to evaluate the reliability of shear wave elastography (SWE) as a non-invasive technique in the characterization of thyroid nodules in children and adolescents. Methods This prospective study included 56 patients with thyroid nodules. All the patients underwent clinical assessment, laboratory investigations, ultrasound, and Doppler examination, followed by an SWE assessment. Statistical analysis was performed and the best cut-off value to differentiate benign from malignant nodules was determined using the ROC curve and AUC. Results Seventy-two nodules were detected in the examined patients (ages ranged from 11 to 19 years, with mean age of 14.89 ± 2.3 years). Fifty-eight nodules (80.6%) were benign, and fourteen nodules (19.4%) were malignant (histopathologically proved). Highly suspicious criteria for prediction of malignancy by ultrasound and Doppler were hypoechoic echopattern, internal or internal and peripheral vascularity, microcalcifications, taller-than-wide dimensions, irregular outlines, and absence of halo (p < 0.05). The diagnostic performance for their summation was 70.69% sensitivity, 82.8% specificity, 80.45% accuracy, a 63.79% positive predictive value (PPV), and 87.9% negative predictive values (NPV). Regarding SWE, our results showed that 42.2 kPa was the best cut-off value, with AUC = 0.921 to differentiate malignant from benign nodules; the diagnostic performance was 85.71% sensitivity, 94.83% specificity, 93.06% accuracy, 76.9% PPV, and 93.2% NPV. Conclusion Shear wave elastography is a non-invasive technique that can assist in the diagnosis of malignant thyroid nodules among children and adolescents.

scholarly journals Diagnostic Performance of Two-dimensional Shear Wave Elastography in Advanced Liver Fibrosis: A Prospective Pathology-based Study

2020 ◽  
Author(s):  
Yao-Kuang Huang ◽  
Ren-Ching Wang ◽  
Sheng-Shun Yang ◽  
Shou-Wu Lee ◽  
Hsin-Ju Tsai ◽  
...  
Keyword(s):  
Chronic Hepatitis ◽  
Liver Fibrosis ◽  
Shear Wave ◽  
Liver Diseases ◽  
Diagnostic Performance ◽  
Shear Wave Elastography ◽  
Two Dimensional ◽  
Liver Disorders ◽  
Advanced Liver Fibrosis ◽  
Invasive Method

Abstract Studies for evaluating the diagnostic performance of two-dimensional Shear-wave Elastography (2D-SWE) in a patient cohort including various liver disorders, remain limited. We aimed to evaluate the validity of 2D-SWE in the diagnosis of advanced liver fibrosis amongst patients with various liver disorders. In this pathology-based study, patients who underwent a liver biopsy for various benign liver diseases were prospectively recruited during the period between February, 2017 and September, 2020. Data of 2D-SWE, Fibrosis-4 Index (FIB-4), and Aspartate Aminotransferase to Platelet Ratio Index (APRI) were simultaneously collected. The cut-off values for predicting advanced fibrosis, i.e. Metavir fibrosis stage ≥ F3, were determined using Receiver Operating Characteristic (ROC) analysis. The diagnostic performance was evaluated and then compared by Area Under the ROC (AUROC). In total, 95 patients were recruited for study analysis. The diagnostic performance of 2D-SWE was significantly superior to that of both FIB-4 (AUROC: 0.88, 95% confidence interval [CI]: 0.80-0.94; vs 0.72, 95%CI: 0.62-0.81; p=0.001) and APRI (AUROC: 0.88, 95%CI: 80-0.94; vs 0.76, 95%CI: 0.66-0.84; p=0.007). With an optimal cutoff value of 9.3 kPa, the sensitivity and specificity were 90.91% and 76.47%, respectively. In subgroup analysis, the AUROC of 2D-SWE was the highest when compared to that of FIB-4 and APRI in patients with chronic hepatitis B, chronic hepatitis C, fatty liver, and concurrent hepatitis. 2D-SWE can therefore be a valid non-invasive method in the detection of advanced liver fibrosis in various liver diseases.

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