Table 1.
Technical Parameters of CT Examination
| Parameter | Institution 1 Philips Brilliance |
Institution 2 Siemens SOMATOM Definition |
|---|---|---|
| Tube voltage (kVp) | 120 | 120 |
| Tube current (mA) | 240 | 225 |
| Rotation time (s) | 0.5 | 0.5 |
| Beam collimation (mm) | 64 × 0.625 | 64 × 0.6 |
| Acquisition mode | Helical | Helical |
| Section thickness (mm) | 5 | 5 |
| Section interval (mm) | 5 | 5 |
| Kernel | B | B31f |
| Reconstruction algorithm | iDose4 level 4 | SAFIRE S3 |
| Matrix | 512 × 512 | 512 × 512 |
| Field of view (mm × mm) | 350 × 350 | 330 × 330 |
Institution 1 indicates The First Hospital of Hunan University of Chinese Medicine, institution 2 indicates Yueyang Central Hospital