Table 2.
CT scans technical parameters
| Baseline CT scans (n = 29) |
Follow-up CT scans (n = 29) |
Total CT scans (n = 58) |
|
|---|---|---|---|
| Patient age at CT (average ± SD; range) (years) |
50.1 ±13.7; 22–71 | 53.4 ±14; 24–78 | 51.7 ± 13.8 |
| Time difference between CT scans (average ± SD; range) (days) |
1187.9 ± 622.4; 344–2558 | ||
| Scanner | |||
| Sensation 16 | 1 | 0 | 1 |
| Definition | 3 | 0 | 3 |
| Definition AS+ | 8 | 2 | 10 |
| Definition Flash | 12 | 10 | 22 |
| Definition Edge | 1 | 1 | 2 |
| Sensation 64 | 2 | 1 | 3 |
| Somatom Force | 2 | 15 | 17 |
| kV | |||
| 70 | 1 | 1 | 2 |
| 80 | 2 | 6 | 8 |
| 90 | 1 | 5 | 6 |
| 100 | 12 | 12 | 24 |
| 110 | 0 | 2 | 2 |
| 120 | 13 | 3 | 16 |
| Slice thickness (average ± SD; range) (mm) | 1 ± 0.2; 0.75–2 | 0.97 ± 0.1; 0.75–1 | 1 ± 0.2 |
| 0.75 | 2 | 3 | 5 |
| 1 | 25 | 26 | 51 |
| 1.5 | 1 | 0 | 1 |
| 2 | 1 | 0 | 1 |
| Kernel | |||
| B20f | 9 | 2 | 11 |
| B25f | 1 | 0 | 1 |
| B26f | 10 | 1 | 11 |
| Bv40 | 2 | 15 | 17 |
| I26f | 6 | 11 | 17 |
| ECG-gating | |||
| Not gated | 6 | 0 | 6 |
| Unknown protocol | 1 | 2 | 3 |
| Retrospective | 2 | 1 | 3 |
| Prospective | 7 | 5 | 12 |
| Prospective high-pitch | 12 | 21 | 33 |
| Phase of the cardiac cycle (%) | |||
| 0–20 | 2 | 4 | 6 |
| 25–40 | 5 | 12 | 17 |
| 45–60 | 5 | 9 | 14 |
| 65–80 | 11 | 3 | 14 |