| 100 kV | Mono_E 70 keV | Mono_E 55 keV | Mono+ 70 keV | Mono+ 55 keV |
Portal vein display | 3.58 ± 0.52 | 3.53 ± 0.51 | 2.65 ± 0.55 | 3.77 ± 0.60 | 4.47 ± 0.56 |
Tumor contour | 3.00 ± 0.29 | 3.03 ± 0.36 | 1.70 ± 0.52 | 3.19 ± 0.51 | 3.97 ± 0.54 |
Image quality | 3.23 ± 0.37 | 3.29 ± 0.36 | 1.70 ± 0.53 | 3.51 ± 0.40 | 4.18 ± 0.42 |