Per-Patient Diagnostic Performance of Nonlaxative CT Colonography and Combined PET/CT Colonography for Lesions ≥6 mm
| Sensitivity | Specificity | Negative predictive value | PPV | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Largest polyp (mm) | Total no. | % | 95% CI | % | 95% CI | % | 95% CI | % | 95% CI |
| CT colonography alone | |||||||||
| ≥6* | 10 | 100 | 100–100 | 89.1 | 80–98 | 100 | 89–100 | 68 | 39–97 |
| ≥10† | 8 | 100 | 100–100 | 93.8 | 87–100 | 100 | 90–100 | 73 | 39–92 |
| PET/CT colonography | |||||||||
| ≥6 | 10 | 100 | 100–100 | 100 | 100–100 | 100 | 90–100 | 100 | 65–100 |
| ≥10 | 8 | 100 | 100–100 | 100 | 100–100 | 100 | 90–100 | 100 | 60–100 |