| | |
Group A
|
Group B
|
|---|
| | |
Attenuation (HU)
|
Attenuation (HU)
|
|---|
| |
Phase
|
140 kVp
|
65 keV
|
50 keV
|
140 kVp
|
65 keV
|
50 keV
|
|---|
|
Aorta
|
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*
|
|
Portal vein
|
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*
|
|
Hepatic
|
Early arterial
|
69.7 ± 9.75
|
74.9 ± 9.09
|
101 ± 16.8*
|
69.0 ± 9.25
|
78.1 ± 10.3
|
105 ± 18.1*
|
|
Parenchyma
|
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*
|
|
Paraspinal
|
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*
|
|
Muscle
|
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
|
|
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*
|
- Data are shown as mean attenuation ± standard deviation.
- *Differences were statistically significant between 65-keV and 50-keV images (p < 0.05).
