Comparison of the Value of Color Doppler Ultrasound and Multislice Spiral CT in the Differential Diagnosis of Benign and Malignant Nodules in the Liver

Table 6

Comparison of noise ratio at different energy levels in MSCT of patients with nodular hepatocellular carcinoma and FNH ( ± s).

Group	n	Arterial phase			Portal phase
		40 KeV	90 KeV	140 KeV	40 KeV	90 KeV	140 KeV
Nodular hepatocellular carcinoma	102	3.21 ± 1.18^e	0.73 ± 0.35^e	0.31 ± 0.08^e	1.10 ± 0.19	1.23 ± 0.53^e	0.84 ± 0.23^e
FNH	50	7.69 ± 1.53	2.20 ± 0.79	0.57 ± 0.15	1.09 ± 0.21	0.32 ± 0.11	0.45 ± 0.12
t		16.325	18.452	10.324	0.408	9.374	11.234
		≤0.001	≤0.001	≤0.001	0.685	≤0.001	≤0.001

Compared with the FNH group, ^e < 0.01.