Value of liver computed tomography with iodixanol 270, 80 kVp and iterative reconstruction

Table 1 Comparison of contrast-to-noise ratios of aorta, portal vein, right portal vein and left portal vein to liver parenchyma in the iohexol 350 and iodixanol 270 group, with the resulting P values

		Iohexol 350 group	Iodixanol 270 group	P value
Arterial Phase Acquisition	CNR Aorta/liver	10.83 ± 3.009	15.33 ± 6.48	0.0040
	CNR PV/liver	1.77 ± 1.55	3.40 ± 1.88	0.0005
	CNR RPV/liver	1.53 ± 1.87	2.47 ± 1.82	0.0129
	CNR LPV/liver	1.18 ± 1.51	2.36 ± 1.81	0.0109
Portal Phase Acquisition	CNR Aorta/liver	3.30 ± 1.64	3.44 ± 1.40	0.7369
	CNR PV/liver	4.85 ± 1.52	7.38 ± 2.89	0.0001
	CNR RPV/liver	4.49 ± 1.61	6.92 ± 2.58	< 0.0001
	CNR LPV/liver	4.43 ± 2.32	6.82 ± 2.27	0.0002

CNR: Comparison of contrast-to-noise ratios; PV: Portal vein; RPV: Right portal vein; LPV: Left portal vein.

Table 2 Analysis and comparison of focal liver lesions

	Iohexol 350 group			Iodixanol 270 group			P values
	No. of lesions	Mean diameter(mm)	CNR	No. of lesions	Mean diameter (mm)	CNR
Hypervascular lesions/arterial phase	12	14.8 ± 8.23	2.522 ± 1.699	17	18.1 ± 8.15	2.266 ± 1.243	0.8532
Hypodense lesions/portal phase	23	28.2 ± 19.5	2.483 ± 1.187	28	24.1 ± 17.8	3.744 ± 2.255	0.0194
Hypodense lesions/equilibrium phase	21	28.4 ± 20.9	1.972 ± 0.9155	8	19.3 ± 11.0	2.395 ± 1.202	0.3162

The P values refer to comparison of contrast-to-noise ratios (CNR) between the two groups.