Evaluation of internal and shell stiffness in the differential diagnosis of breast non-mass lesions by shear wave elastography

Figure 4 Receiver operating characteristic curves for internal and peripheral elasticity parameters of the shell at 1 mm, 1. 5 mm, 2 mm, 2.5 mm, and 3 mm, respectively. A: Receiver operating characteristic curves for internal elasticity parameters maximum (Emax), mean (Emean), minimum (Emin) elastic values and the standard deviation (Esd), the area under the curve (AUC) was 0.707, 0.626, 0.425 and 0.687, respectively; B: Emax and Emean of the shell at 1 mm (as E1max and E1mean), AUC was 0.795 and 0.647 respectively; C: Emax and Emean of the shell at 1.5 mm (as E1.5max and E1.5mean), AUC was 0.789 and 0.692, respectively; D: Emax and Emean of the shell at 2 mm (as E2max and E2mean), AUC was 0.826 and 0.704, respectively. E: Emax and Emean of the shell at 2.5 mm (as E2.5max and E2.5mean), AUC was 0.900 and 0.746, respectively; F: Emax and Emean of the shell at 3 mm (as E3max and E3mean), AUC was 0.881 and 0.734, respectively. Emax: Maximum; Emean: Mean; Min: Minimum; Esd: Elastic values and the standard deviation; AUC: The area under the curve.