Table 1. CT protocols.
| Scan parameters | Site A | Site B | Site C |
| Scan direction | Craniocaudal | Caudocranial | Craniocaudal |
| kVp | 120 | 120 | 100 |
| Slice collimation (mm) | 64×0.625 | 64×0.625 | 24×1.2 |
| Rotation time (s) | 0.4 | 0.4 | 0.37 |
| Pitch | 0.984 | 1.172 | 0.75 |
| mAs | 136 | 100 | 135 |
| Contrast volume (ml) | 70 | 90 | 40–70a |
| Concentration (iodine ml–1) | 320 | 300 | 300 |
| Flow (ml s–1) | 5 | 5 | 6 |
| NaCl chaser (ml) | 20 | 30 | 30 |
| Delay(s)/threshold to trigger (HU) | 3 | 8/150 | 5–12 |
| Reconstructed slice thickness (mm) | 0.625 | 0.9 | 1.5 |
| Reconstruction interval (mm) | 0.5 | 0.45 | 1.0 |
aWeight adapted.