Table 1.
CT scanning and reconstruction settings for the four algorithms.
| FBP | HIR | MBIR | DLR | ||
|---|---|---|---|---|---|
| Acquisition mode | High‐resolution mode (1,792 channels) | ||||
| Focal spot size | 0.9 × 1.2 mm | ||||
| Tube voltage | 120 kVp | ||||
| Tube current (CTDIvol) | 590, 300, 150‐mA (26.3, 13.4, 6.7‐mGy) | ||||
| Rotation time | 0.5 s | ||||
| Collimation (configuration) | 40 mm (80 × 0.5 mm) | ||||
| Pitch | 0.8 | ||||
| Field of view | 400 mm | ||||
| Slice thickness | 0.5 mm, 5 mm | ||||
| Image matrix | 1024 × 1024 | ||||
| Kernel/parameter | FC13 | FC13/standard | Body standard | Body standard | |
Abbreviations: CTDIvol, volume computed tomography dose index; DLR, deep learning‐based reconstruction; FBP, filtered back projection; HIR, hybrid iterative reconstruction; MBIR, model‐based iterative reconstruction.