Acquisition protocol for submillimetre coronary computed tomographic angiography (CTA)
| *Reconstructions centred at 45%, 55%, 65%, and 75% of the RR interval; †two patients only. | |||
| Segment: partial segment reconstruction (heart rates <60 beats/min); burst: partial subsegmental reconstruction of two cardiac cycles (<75 beats/min); burst plus: partial subsegmental reconstruction of four cardiac cycles (>75 beats/min). | |||
| Contrast | 100 ml, 370 (Iopromide) to 400 (Iomeron 400) mg I/ml at 4.0 ml/s | ||
| 50 ml, saline at 4.0 ml/s | |||
| Collimation | 16×0.63 mm | ||
| Current | 300–470 mA | ||
| Voltage | 120 kV | ||
| Gating | Retrospective | ||
| Feed | Variable between 2.75 and 3.0 mm per rotation | ||
| Reconstruction parameters* | |||
| Algorithm | Segment | Burst | Burst plus† |
| Rotation | 500 ms | 500 ms | 500 ms |
| Temporal resolution | 250 ms | 125 ms | 65 ms |
| Thickness | 0.625 mm at an interval of 0.625 mm | ||