Application of Point Shearwave Elastography to Breast Ultrasonography: Initial Experience Using “S-Shearwave†in Differential Diagnosis
10.3348/jksr.2020.81.1.157
- Author:
Myung Hwan LEE
1
;
Eun Kyung KIM
;
Eun Ju LEE
;
Ha Yan KIM
;
Jung Hyun YOON
Author Information
1. Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea. lvjenny@yuhs.ac
- Publication Type:Original Article
- From:Journal of the Korean Radiological Society
2020;81(1):157-165
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE:To evaluate the optimal measurement location, cut-off value, and diagnostic performance of S-Shearwave in differential diagnosis of breast masses seen on ultrasonography (US).
MATERIALS AND METHODS:During the study period, 225 breast masses in 197 women were included. S-Shearwave measurements were made by applying a square region-of-interest automatically generated by the US machine. Shearwave elasticity was measured three times at four different locations of the mass, and the highest shearwave elasticity was used for calculating the optimal cut-off value. Diagnostic performance was evaluated by using the area under the receiving operator characteristic curve (AUC).
RESULTS:Of the 225 breast masses, 156 (69.3%) were benign and 69 (30.7%) were malignant. Mean S-Shearwave values were significantly higher for malignant masses (108.0 ± 70.0 kPa vs. 43.4 ± 38.3 kPa; p < 0.001). No significant differences were seen among AUC values at different measurement locations. With a cut-off value of 41.9 kPa, S-Shearwave showed 85.7% sensitivity, 63.9% specificity, 70.7% accuracy, and positive and negative predictive values of 51.7% and 90.8%, respectively. The AUCs for US and S-Shearwave did not show significant differences (p = 0.179).
CONCLUSION:S-Shearwave shows comparable diagnostic performance to that of grayscale US that can be applied for differential diagnosis of breast masses seen on US.
