Table 4.
Detection rate of vascular pathologies using different phases, duplex ultrasound in comparison to the dCTA findings.
| dCTA Interpretation | Single phase read | Dual-phase read | Duplex ultrasound | |
|---|---|---|---|---|
| Stenosis >50% | 20 | 20 | 20 | 19 |
| Complete thrombosis | 5 | 3 | 5 | 6 |
| Partial thrombosis | 11 | 4 | 10 | 6 |
| High-flow shunt | 12 | 0 | 0 | 6 |
| Venous aneurysm | 5 | 5 | 5 | 5 |
| No abnormalities | 1 | 1 | 1 | 0 |
Note – dCTA = time-resolved dynamic CT angiographie; single phase = fixed delay after contras media injection of 18 sec; dual-phase = best arterial phase and best venous phase.