Table 1.
Scanners and scan protocols.
| Scanner | Collimation (mm) | kV | mA | CTDIvol (mGy) | Pitch | Rotation time (s) | Slice thickness (mm) | Convolution kernel | Reconstruction technology |
|---|---|---|---|---|---|---|---|---|---|
| Reference scanner | 20 × 0.625 | 80 | 40 | 2.66 | 0.5 | 0.5 | 0.6 | bone, standard | FBP |
| standard, NR40 | VEO | ||||||||
| Test scanner 1 | 19.2 × 0.6 | 100 | 35 | 3.44 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP |
| 80 | 54 | 2.65 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| 80 | 40 | 1.92 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| 80 | 21 | 1.03 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| Test scanner 2 | 38.4 × 0.6 | 100 | 35 | 3.08 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP |
| J45f, J30f | SAFIRE 3, SAFIRE 5 | ||||||||
| 80 | 61 | 2.65 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| J45f, J30f | SAFIRE 3, SAFIRE 5 | ||||||||
| 80 | 40 | 1.73 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| J45f, J30f | SAFIRE 3, SAFIRE 5 | ||||||||
| 80 | 23 | 1.00 | 0.5 | 0.5 | 0.6 | H60f, H30f | FBP | ||
| J45f, J30f | SAFIRE 3, SAFIRE 5 |
FBP, Filtered back projection; SAFIRE, Sinogram-affirmed iterative reconstruction; VEO, model-based iterative reconstruction.