Radiomic analysis based on multi-phase magnetic resonance imaging to predict preoperatively microvascular invasion in hepatocellular carcinoma

Table 2 Comparison of different imaging features according to microvascular invasion

MRI feature	MVI+ (n = 73)	MVI- (n = 40)	P value
MTD (cm)1	7.23 ± 4.30	3.80 ± 2.43	< 0.001
Arterial rim enhancement (%)			0.002
Absent	37 (50.7)	32 (80)
Present	36 (49.3)	8 (20)
Arterial peritumoral enhancement (%)			0.134
Absent	53 (72.6)	34 (85)
Present	20 (27.4)	6 (15)
Tumor margin (%)			0.004
Smooth	36 (49.3)	31 (77.5)
Non-smooth	37 (50.7)	9 (22.5)
Radiological capsule (%)			0.303
Absent	19 (26.0)	7 (17.5)
Present	54 (74.0)	33 (82.5)
Tumor hypointensity in the HBP (%)			0.336
Absent	2 (2.9)	3 (8.3)
Present	67 (97.1)	33 (91.7)
Peritumoral hypointensity in the HBP (%)			0.016
Absent	17 (24.6)	34 (94.4)
Present	52 (75.4)	2 (5.6)

¹Data are the mean ± SD.

There were eight patients who had no HBP images. HBP: Hepatobiliary phase; MVI: Microvascular invasion; MTD: Maximum tumor diameter; MRI: Magnetic resonance imaging.