| | | |
Group A
|
Group B
|
|---|
| | | |
Score
|
Score
|
|---|
| |
Phase
| |
140 kVp
|
65 keV
|
50 keV
|
140 kVp
|
65 keV
|
50 keV
|
|---|
|
Image contrast
|
Early arterial
|
Reader 1
|
3.1 ± 0.3
|
3.4 ± 0.4
|
3.9 ± 0.2*
|
3.2 ± 0.4
|
3.4 ± 0.4
|
3.9 ± 0.2*
|
| | |
Reader 2
|
3.3 ± 0.4
|
3.5 ± 0.5
|
3.8 ± 0.3*
|
3.4 ± 0.5
|
3.5 ± 0.5
|
3.8 ± 0.3*
|
| |
Late arterial
|
Reader 1
|
3.3 ± 0.4
|
3.8 ± 0.3
|
3.9 ± 0.2
|
3.5 ± 0.5
|
3.9 ± 0.1
|
4.0 ± 0.0
|
| | |
Reader 2
|
3.2 ± 0.5
|
3.8 ± 0.3
|
3.9 ± 0.2
|
3.5 ± 0.5
|
3.9 ± 0.2
|
4.0 ± 0.0
|
| |
Portal venous
|
Reader 1
|
3.4 ± 0.5
|
3.8 ± 0.3
|
3.9 ± 0.1
|
3.4 ± 0.5
|
3.9 ± 0.1
|
3.9 ± 0.2
|
| | |
Reader 2
|
3.3 ± 0.5
|
3.8 ± 0.3
|
4.0 ± 0.0
|
3.4 ± 0.4
|
3.8 ± 0.3
|
3.9 ± 0.1
|
|
Image noise
|
Early arterial
|
Reader 1
|
3.7 ± 0.4
|
3.5 ± 0.4
|
2.9 ± 0.5*
|
3.7 ± 0.4
|
3.4 ± 0.5
|
2.9 ± 0.4*
|
| | |
Reader 2
|
3.9 ± 0.2
|
3.8 ± 0.7
|
3.3 ± 0.6*
|
3.9 ± 0.2
|
3.6 ± 0.5
|
3.3 ± 0.7
|
| |
Late arterial
|
Reader 1
|
3.5 ± 0.5
|
3.2 ± 0.6
|
2.7 ± 0.7*
|
3.6 ± 0.4
|
3.1 ± 0.7
|
2.8 ± 0.6
|
| | |
Reader 2
|
4.0 ± 0.0
|
3.7 ± 0.8
|
3.4 ± 0.8
|
3.9 ± 0.2
|
3.8 ± 0.7
|
3.2 ± 0.9
|
| |
Portal venous
|
Reader 1
|
3.4 ± 0.5
|
3.3 ± 0.6
|
3.2 ± 0.6
|
3.7 ± 0.4
|
3.3 ± 0.5
|
3.2 ± 0.4
|
| | |
Reader 2
|
3.9 ± 0.2
|
3.6 ± 0.4
|
3.5 ± 0.5
|
4.0 ± 0.0
|
3.7 ± 0.4
|
3.5 ± 0.5
|
|
Overall image quality
|
Early arterial
|
Reader 1
|
3.7 ± 0.4
|
3.4 ± 0.4
|
3.0 ± 0.3*
|
3.6 ± 0.4
|
3.5 ± 0.5
|
2.9 ± 0.3*
|
| | |
Reader 2
|
3.4 ± 0.5
|
3.5 ± 0.4
|
3.2 ± 0.6
|
3.5 ± 0.5
|
3.2 ± 0.8
|
3.2 ± 0.8
|
| |
Late arterial
|
Reader 1
|
3.2 ± 0.4
|
3.2 ± 0.6
|
2.9 ± 0.6*
|
3.5 ± 0.5
|
3.2 ± 0.6
|
2.9 ± 0.6*
|
| | |
Reader 2
|
3.2 ± 0.5
|
3.6 ± 0.8
|
3.2 ± 0.6
|
3.5 ± 0.5
|
3.7 ± 0.7
|
3.2 ± 0.9
|
| |
Portal venous
|
Reader 1
|
3.5 ± 0.5
|
3.5 ± 0.5
|
3.4 ± 0.5
|
3.7 ± 0.4
|
3.5 ± 0.5
|
3.4 ± 0.5
|
| | |
Reader 2
|
3.3 ± 0.4
|
3.5 ± 0.5
|
3.5 ± 0.5
|
3.5 ± 0.5
|
3.7 ± 0.4
|
3.5 ± 0.5
|
- Data are shown as mean ± standard deviation.
- *Differences were statistically significant between 65-keV and 50-keV images (p < 0.05).
- n.s.: not significant.
