Table 1.
CT scanning parameters of relevant anatomic regions
| Parameters | Head CT n=607 (34%) | Neck CT n=149 (8%) | Chest CT n=561 (32%) | Abdomen CT n=464 (26%) |
|---|---|---|---|---|
| Slice thickness (mm) | 2.5 | 2.5 | 2.5 | 1.25 |
| Detector coverage (mm) | 20 | 40 | 40 | 40 |
| Tube current (reference noise index) (mAs)a | 170–500 (3.80) | 80–400 (9.10) | 90–400 (15.86) | 80–450 (15.86) |
| Tube voltage (kV) | 120 | 120 | 120 | 120 |
| Gantry rotation time (s) | 0.5 | 0.6 | 0.5 | 0.5 |
| Pitch | 0.53 | 0.98 | 1.37 | 1.37 |
n represents number of CT scans. Percentage represents the number of scans in that particular region within the total number of scans.
a
Auto mAs was activated and iterative reconstruction was performed.