Table 5.
Nine patients (high-pitch n = 2; sequential n = 6; low-pitch n = 1) underwent invasive coronary angiography (ICA) after CCTA. These included 126 coronary segments. Per-segment and per-patient diagnostic performance parameters are shown.
| Per Segment | For Coronary Stenosis > 50% |
| Total Number (n) | 126 |
| Significant Stenosis (≥50%) | 13 |
| No Significant Stenosis | 113 |
| Segments with Stents | 3 (all evaluable) |
| True Negative | 108 |
| True Positive | 12 |
| False Negative | 1 |
| False Positive | 5 |
| Sensitivity | 92% |
| Specificity | 96% |
| PPV | 71% |
| NPV | 99% |
| Accuracy | 95% |
| per patient | For coronary stenosis >50% |
| Total Number (n) | 9 |
| Significant Stenosis (≥50%) | 3 |
| No Significant Stenosis | 6 |
| Patients with Stents | 1 (evaluable) |
| True Negative | 4 |
| True Positive | 3 |
| False Negative | 0 |
| False Positive | 2 |
| Sensitivity | 100% |
| Specificity | 67% |
| PPV | 60% |
| NPV | 100% |
| Accuracy | 78% |
PPV (positive predictive value), NPV (negative predictive value).