Number of Incidents
| Error type | Incidents (n) |
| TOP noncompliance | 179 (85.6%) |
| Patient interview TOP | 26 (12.4%) |
| Noncompliance | 19 (9.1%) |
| Errors in request form | 5 (2.4%) |
| Failure to check for pregnancy/breastfeeding | 2 (1.0%) |
| Procedural TOP | 153 (73.2%) |
| Handover error | 4 (1.9%) |
| Staff error | 14 (6.7%) |
| Errors in internal systems | 3 (1.4%) |
| Lack of procedure matching | 15 (7.2%) |
| Incorrect dose | 15 (7.2%) |
| Incorrect radiopharmaceutical | 76 (36.4%) |
| Lack of intravenous access | 19 (9.1%) |
| Request form ambiguity | 3 (1.4%) |
| Lack of quality control | 4 (1.9%) |
| Booking errors | 9 (4.3%) |
| Errors in internal or external systems | 5 (2.4%) |
| Use of nonoriginal request form | 4 (1.9%) |
| Other errors | 21 (10.0%) |
| Inadequate student/new-graduate supervision | 6 (2.9%) |
| Inadequate training | 4 (1.9%) |
| Exposure of staff or public to radiation | 1 (0.5%) |
| Spillage of radiopharmaceutical | 10 (4.8%) |
| Total | 209 |