| Diagnostic Indices | Direct Digital/Coronal | Digital Subtraction/ Coronal | Direct Digital/Apical | Digital Subtraction/ Apical |
| Sensitivity | 30% | 40% | 40% | 30% |
| Specificity | 100% | 100% | 90% | 100% |
| PPV | 100% | 100% | 80% | 100% |
| NPV | 58.8% | 63.5% | 60% | 58.8% |
| Accuracy | 65% | 70% | 65% | 65% |