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

Table 3 Comparison of elasticity parameters around non-mass lesions

Peripheral parameter		Benign (n = 66)	Malignant (n = 52)	t/χ2 value	P value
“Stiff rim” sign		6	26	24.628	0.000
Shell at 1 mm	E1 max	45.53 ± 22.81	125.41 ± 35.68	-14.765	0.000
	E1 mean	24.94 ± 7.92	45.49 ± 17.71	-8.425	0.000
Shell at 1.5 mm	E1.5 max	46.61 ± 22.39	136.40 ± 38.39	-15.889	0.000
	E1.5 mean	25.36 ± 8.52	49.64 ± 18.98	-9.281	0.000
Shell at 2 mm	E2 max	50.43 ± 24.62	153.95 ± 35.56	-18.655	0.000
	E2 mean	26.34 ± 7.16	54.62 ± 17.98	-11.668	0.000
Shell at 2.5 mm	E2.5 max	48.43 ± 25.62	167.95 ± 37.56	-20.506	0.000
	E2.5 mean	29.34 ± 7.16	69.62 ± 19.98	-15.200	0.000
Shell at 3 mm	E3 max	42.43 ± 20.62	153.95 ± 23.56	-27.386	0.000
	E3 mean	26.34 ± 7.16	58.62 ± 14.98	-15.424	0.000