Outcome Studies
| Study | Reference standard | SPECT criteria | V agent | NPV | Prospective | Patient characteristics |
|---|---|---|---|---|---|---|
| Corbus (4) | Outcome | Revised PIOPED: high or inter = PE; low or normal = no PE | 99mTc-DTPA | 786/813 (97%) | Some yes | Consecutive suspected PE |
| Leblanc (16) | Outcome | ≥1 mismatch = PE; 0 mismatch = no PE | Technegas | 399/405 (99%) | Yes | Consecutive suspected PE |
NPV = negative predictive value.