S1. CT scanning parameters for patients.
| Scanner | Tube
voltage (kV) |
Tube
current (mAs) |
Rotation time (s) | Detector collimation (mm) | Field of view (mm) | Matrix | Reconstruction
section thickness (mm) |
Acquisition
time (s) |
|
| Arterial phase | Portal venous phase | ||||||||
| CT, computed tomography. | |||||||||
| SOMATOM Definition Flash (Siemens Healthcare, Forchheim, Germany) | 120 | 130 | 0.5 | 2×64×0.6 | 360×360 | 512×512 | 1.0 | 30 | 60 |
| 256-slice Brilliance iCT (Philips Healthcare, Cleveland, Ohio, USA) | 120 | 130 | 0.5 | 128×0.625 | 360×360 | 512×512 | 1.0 | 30 | 60 |
| 64-slice LightSpeed VCT (GE Medical systems, Milwaukee, WI, USA) | 120 | 130 | 0.4 | 64×0.625 | 360×360 | 512×512 | 1.25 | 30 | 60 |