Table 1 Characteristics and data collection parameters for the study population
Characteristic | Training and tuning (A) (N = 83) | Internal validation (A) (N = 15) | External validation (B) (N = 20) | External validation (C) (N = 20) |
|---|---|---|---|---|
Age (in years) | 59.9 ± 17.2 | 63.1 ± 16.9 | 40.0 ± 19.7 | 43 ± 18.6 |
Male | 44 | 8 | 10 | 10 |
Female | 39 | 7 | 10 | 10 |
Tube voltage (kV) | 120 | 120 | 90 | 90 |
Tube current (mA) | 5 | 5 | 4 | 4 |
Scan time (s) | 16.8 | 16.8 | 14.3 | 15 |
Voxel size (mm) | 0.3 | 0.3 | 0.3 | 0.08 ~ 0.25 |
FOV (mm2) | 230 × 170 | 230 × 170 | 170 × 135 | 150 × 150 |
Focal spot (mm) | 0.58 | 0.58 | 0.70 | 0.50 |