Article: article from journal or magazin.
Added value of Virtual Touch IQ shear wave elastography in the ultrasound assessment of breast lesions
Eur J Radiol
1872-7727 (Electronic)0720-048X (Linking)
Ianculescu, VictorCiolovan, Laura MariaDunant, ArianeVielh, PhilippeMazouni, ChafikaDelaloge, SuzetteDromain, ClarisseBlidaru, AlexandruBalleyguier, CorinneengComparative StudyIreland2014/03/08 06:00Eur J Radiol. 2014 May;83(5):773-7. doi: 10.1016/j.ejrad.2014.01.021. Epub 2014 Feb 6.
PURPOSE: To determine the diagnostic performance of Acoustic Radiation Force Impulse (ARFI) Virtual Touch IQ shear wave elastography in the discrimination of benign and malignant breast lesions. MATERIALS AND METHODS: Conventional B-mode and elasticity imaging were used to evaluate 110 breast lesions. Elastographic assessment of breast tissue abnormalities was done using a shear wave based technique, Virtual Touch IQ (VTIQ), implemented on a Siemens Acuson S3000 ultrasound machine. Tissue mechanical properties were interpreted as two-dimensional qualitative and quantitative colour maps displaying relative shear wave velocity. Wave speed measurements in m/s were possible at operator defined regions of interest. The pathologic diagnosis was established on samples obtained by ultrasound guided core biopsy or fine needle aspiration. RESULTS: BIRADS based B-mode evaluation of the 48 benign and 62 malignant lesions achieved 92% sensitivity and 62.5% specificity. Subsequently performed VTIQ elastography relying on visual interpretation of the colour overlay displaying relative shear wave velocities managed similar standalone diagnostic performance with 92% sensitivity and 64.6% specificity. Lesion and surrounding tissue shear wave speed values were calculated and a significant difference was found between the benign and malignant populations (Mann-Whitney U test, p<0.0001). By selecting a lesion cut-off value of 3.31m/s we achieved 80.4% sensitivity and 73% specificity. Applying this threshold only to BIRADS 4a masses, we reached overall levels of 92% sensitivity and 72.9% specificity. CONCLUSION: VTIQ qualitative and quantitative elastography has the potential to further characterise B-mode detected breast lesions, increasing specificity and reducing the number of unnecessary biopsies.
Adult, Aged, Breast Neoplasms/*ultrasonography, Elasticity Imaging Techniques/*methods, Female, Humans, Image Enhancement/methods, Image Interpretation, Computer-Assisted/*methods, Middle Aged, Multimodal Imaging/methods, Observer Variation, Palpation/*methods, Reproducibility of Results, Sensitivity and Specificity, Touch, Ultrasonography, Mammary/*methods, *User-Computer Interface
Last modification date