Positivity Rates of 18F-DCFPyL PET/CT Based on PSA Level and PSA Doubling Time
| PSA parameter | Positive scan (n) | Negative scan (n) | Percentage positive |
| Level (ng/mL) | |||
| PSA < 0.5 | 4 | 4 | 50% |
| 0.5 ≤ PSA < 1 | 9 | 4 | 69% |
| 1 ≤ PSA < 2 | 5 | 0 | 100% |
| 2 ≤ PSA < 5 | 20 | 2 | 91% |
| PSA ≥ 5 | 23 | 1 | 96% |
| Total | 61 | 11 | 85% |
| Doubling time (mo)* | |||
| 0–3 | 13 | 2 | 87% |
| 3–6 | 17 | 3 | 85% |
| 6–12 | 11 | 1 | 92% |
| >12 | 11 | 3 | 79% |
↵* Two patients were treated with ADT before 18F-DCFPyL PET/CT and PSA was down-trending. Six patients had fluctuating to down-trending PSA before scan with no treatment. Three patients referred from outside hospital had no documented PSA trend or nadir.