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Overview of the scanners used for the acquisition of the radiographs. Scanners with less than 50 examinations were gathered into the “Other” group
| All (N = 4436) | Train (N = 3816) | Internal validation (N = 423) | External validation (N = 197) | |
|---|---|---|---|---|
| SIEMENS Flurospot Compact FD | 2287 | 1884 | 403 | 0 |
| AGFA (CR 58, Solo, 51xx, Compact Plus) | 1902 | 1902 | 0 | 0 |
| CANON | 189 | 0 | 0 | 189 |
| Other | 58 | 30 | 20 | 8 |
