Table 1.
Demographics and CT vendor distributions in simulated and prospective test sets
| Simulated Test Set Mean (SD) / N (%) | Prospective Test Set Mean (SD) / N (%) | External Test Set Mean (SD) / N (%) | |
|---|---|---|---|
| Total CT scans | 14,039 | 6351 | 480 |
| Age | 54 (13.1) | 59 (16.9) | 57 (19.0) |
| Female | 6767 (48.2%) | 3000 (47.2%) | 204 (42.5%) |
| CT Vendors | |||
| Philips Brilliance 64 | 1123 (8.0%) | ||
| Siemens Somatom definition | 1502 (10.7%) | ||
| Siemens Somatom definition Flash | 772 (5.5%) | 524 (8.3%) | 8 (1.7%) |
| Siemens Somatom definition AS | 624 (60.1%) | 2772 (43.6%) | |
| GE LightSpeed VCT | 2204 (15.7%) | 1479 (23.3%) | 33 (6.9%) |
| GE Revolution Frontier | 1576 (24.8%) | 193 (40.2%) | |
| GE Discovery | 99 (20.6%) | ||
| Toshiba Aquilion ONE | 136 (28.3%) | ||
| Pneumoperitoneum | 139 (1.0%) | 82 (1.3%) | 80 (16.7%) |
CT Computed Tomography, PPV Positive Predictive Value.