Table 4.
Diagnostic performance of conventional PET/CT, PSF PET/CT, and pelvic MRI for differentiating T3-4 stage from T1-2 stage in patients with rectal cancer
| Conventional PET/CT | PSF-PET/CT | Pelvic MRI | |
|---|---|---|---|
| Sensitivity, % | 63.6 (0.45 to 0.80) | 57.6 (0.39 to 0.74) | 70.0 (0.51 to 0.84) |
| Specificity, % | 93.8 (0.70 to 0.99) | 93.8 (0.70 to 0.99) | 81.2 (0.54 to 0.96) |
| Accuracy, % | 73.5 (0.59 to 0.85) | 69.4 (0.55 to 0.82) | 73.5 (0.59 to 0.85) |
| PPV, % | 95.5 (0.77 to 0.99) | 95.0 (0.75 to 0.99) | 88.8 (0.70 to 0.98) |
| NPV, % | 55.6 (0.35 to 0.74) | 51.7 (0.33 to 0.71) | 56.5 (0.59 to 0.85) |
| Positive LR | 10.2 (1.50 to 69.10) | 9.2 (1.30 to 62.80) | 3.7 (1.30 to 10.60) |
| Negative LR | 0.38 (0.24 to 0.62) | 0.45 (0.30 to 0.69) | 0.37 (0.21 to 0.66) |
The numbers in parentheses represent the 95% confidence interval
LR likelihood ratio, NPV negative predictive value, PPV positive predictive value, PSF point spread function