Table 3 Mean CNRs for the aorta, portal vein and hepatic parenchyma

Early arterial phase

29.5 ± 7.17

46.6 ± 12.7

51.7 ± 13.1*

36.6 ± 9.92

56.6 ± 18.0

62.4 ± 16.7*

0.015

<0.01

Late arterial phase

29.1 ± 8.66

47.5 ± 14.2

53.7 ± 14.8*

25.3 ± 10.0

38.4 ± 16.8

44.1 ± 16.0*

0.018

0.01

Portal venous phase

10.6 ± 5.02

16.4 ± 4.22

20.1 ± 5.74*

10.8 ± 3.96

16.6 ± 5.28

19.6 ± 4.74*

n.s.

n.s.

Early arterial phase

2.41 ± 2.78

3.88 ± 3.02

5.31 ± 3.17*

2.48 ± 3.60

5.49 ± 4.29

6.88 ± 4.20*

n.s.

n.s.

Late arterial phase

10.3 ± 4.89

19.0 ± 4.73

22.0 ± 4.57*

13.0 ± 5.17

18.9 ± 5.11

21.8 ± 4.77*

n.s.

n.s.

Portal venous phase

10.6 ± 2.93

17.8 ± 4.59

20.7 ± 4.38*

11.5 ± 3.51

18.1 ± 5.38

21.4 ± 6.31*

n.s.

n.s.

Early arterial phase

1.47 ± 1.29

1.35 ± 1.45

1.36 ± 1.48

1.17 ± 1.87

1.66 ± 1.80

1.55 ± 1.94

n.s.

n.s.

Late arterial phase

3.37 ± 2.05

9.32 ± 3.16

9.94 ± 2.67*

3.70 ± 1.92

8.73 ± 2.61

9.47 ± 2.57*

n.s.

n.s.

Portal venous phase

5.69 ± 1.60

8.28 ± 2.46

8.96 ± 2.25*

5.97 ± 1.92

7.56 ± 2.77

8.45 ± 2.83*

n.s.

n.s.