Table 1.
Description and characteristics of CBCT dataset from different centers, including internal set (for training, and testing) and external testing set.
| Cohorts | Internal set | External testing set | |||
|---|---|---|---|---|---|
| CQ-Hospital | HZ-Hospital | SH-Hospital | |||
| Demographic variables | CBCT number | 1532 | 1798 | 1201 | 407 |
| Patient number | 924 | 1689 | 1198 | 404 | |
| Female | 516 | 970 | 547 | 279 | |
| Male | 408 | 719 | 651 | 125 | |
| Age (years) | 40.6 (6, 84) | 37.9 (6, 86) | 38.9 (4, 90) | 29.5 (6–85) | |
| Imaging protocols | Resolution (mm) | 0.40 (1473 cases) | 0.40 (1194 cases) | 0.30 (196 cases) | 0.50 (30 cases) |
| 0.30 (43 cases) | 0.20 (601 cases) | 0.20 (3 cases) | 0.38 (51 cases) | ||
| 0.25 (16 cases) | 0.15 (3 cases) | 0.16 (997 cases) | 0.30 (72 cases) | ||
| 0.12 (5 cases) | 0.25 (236 cases) | ||||
| 0.15 (18 cases) | |||||
| Manufacturer | Imaging Sciences International | Planmeca | Vatech; Sirona | Instrumentarium Dental; LargeV; Bondent Imaging; Carestream Health; Trophy; FUSSEN; PointNix; HDXWILL; GENORAY; SOREDEX; RAY; MEYER; | |
| Manufacturer’s model | 17–19 | ProMax | PHT-6500; XG3D | OP300; HighRes3D; Bondream 3D-1020; CS 9300; K9500; Point Combi 500; DENTRI-C; PAPAYA 3D; Cranex3D; RAYSCAN; SS-X10010DPlus; SS-X9010DPro; SS-X9010DPro-3DE | |
| Tube voltage (kvp) | 80–120 | 80–90 | 70–100 | 70–120 | |
| Tube current (mA) | 5–12 | 4–14 | 3–10 | 4–13 | |
| Dental abnormalities | Missing teeth (cases) | 613 | 497 | 181 | 137 |
| Misalignment (cases) | 1141 | 1286 | 1009 | 314 | |
| Metal artifacts (cases) | 337 | 225 | 72 | 96 | |
In demographic variables, the age is presented as average (range). In imaging protocols, the resolution is presented as a specific number (number of cases).