Preoperative prediction of microvascular invasion in hepatocellular carcinoma using ultrasound features including elasticity

Table 4 Comparisons of shear wave elastography results between mild microvascular invasion and severe microvascular invasion hepatocellular carcinomas

MVI	Emax of the periphery of tumors in m/s	Emax of the tumors in m/s
Mild MVI, n = 54	1.42 (1.23-1.84)	2.24 (2.00-2.56)
Severe MVI, n = 48	1.67 (1.37-1.98)	2.37 (2.03-2.67)
Z	2.437	0.811
P value	0.014	0.420

Emax: Maximal elasticity; MVI: Microvascular invasion.