Table 2 Mean attenuation values for the aorta, portal vein, hepatic parenchyma and paraspinal muscle (HU) and image noise

Early arterial

296 ± 42.2

422 ± 65.6

751 ± 119*

355 ± 56.2

511 ± 85.0

907 ± 156*

Late arterial

302 ± 54.2

441 ± 82.9

787 ± 151*

282 ± 75.6

398 ± 93.7

705 ± 172*

Portal venous

154 ± 39.0

207 ± 20.3

368 ± 63.2*

158 ± 22.1

219 ± 23.0

375 ± 32.5*

Early arterial

77.4 ± 22.2

94.8 ± 23.4

152 ± 39.7*

82.0 ± 23.4

107 ± 30.5

175 ± 53.4*

Late arterial

146 ± 34.5

206 ± 45.1

353 ± 81.6*

170 ± 36.8

250 ± 50.4

436 ± 91.2*

Portal venous

154 ± 18.9

219 ± 25.3

378 ± 43.0*

163 ± 19.7

233 ± 23.6

398 ± 47.3*

Early arterial

69.7 ± 9.75

74.9 ± 9.09

101 ± 16.8*

69.0 ± 9.25

78.1 ± 10.3

105 ± 18.1*

Late arterial

89.7 ± 16.4

141 ± 16.8

219 ± 26.3*

91.8 ± 13.6

145 ± 13.2

225 ± 22.9*

Portal venous

113 ± 10.1

141 ± 14.4

221 ± 25.2*

115 ± 10.3

140 ± 15.0

217 ± 24.9*

Early arterial

58.2 ± 4.98

64.5 ± 5.07

84.2 ± 8.18*

57.5 ± 4.67

64.8 ± 7.15

85.3 ± 11.9*

Late arterial

61.3 ± 7.77

67.9 ± 7.77

89.4 ± 11.1*

68.8 ± 7.10

68.8 ± 7.10

92.0 ± 12.7*

Portal venous

66.6 ± 6.09

73.9 ± 6.23

101 ± 9.76*

65.0 ± 5.62

74.6 ± 7.25

99.3 ± 18.8*

Image noise

Image noise

Early arterial

8.27 ± 1.30

8.06 ± 1.81

13.1 ± 1.81*

8.56 ± 1.50

8.42 ± 1.84

13.6 ± 2.03*

Late arterial

8.52 ± 1.38

8.24 ± 1.64

13.3 ± 2.08*

8.84 ± 1.76

8.91 ± 2.11

13.4 ± 2.23*

Portal venous

8.57 ± 1.39

8.44 ± 1.57

13.5 ± 1.84*

8.96 ± 1.92

8.61 ± 2.05

13.8 ± 1.91*