Table 1 Acquisition protocol for dynamic CTP and DECT.
Phase | Tube potential | Tube current (mAs) | Rotation time (s) | Detector coverage (mm) | Slice thickness (mm) | Pitch/speed (mm/rot) | DLP (mGy-cm) | Total exposure time (s) | CTDIVOL (mGy) | Number of acquisitions | Matrix size (mm) | DFOV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
I Native | 120 kVp | 630 | 0.6 | 40 | 2.5 | 1.375:1/55.00 | – | 5.18 | – | Helical | 512 × 512 | Large (50 cm) |
Contrast agent: 50 ml (flow 5 ml/s, bolus time 10 s) | ||||||||||||
II CTP | 80 kVp | 100 | 2.0 | 40 | 5.0 | – | 648,61 | 60.0 | 162,15 | Axial 30 | 512 × 512 | Large (50 cm) |
Contrast agent: [2 ml/kg–50 ml], (flow 5 ml/s); bolus tracking ROI: descending aorta, trigger threshold 100 HU | ||||||||||||
III DECT | 70 keV | ~ 260 | 0.8 | 40 | 1.25 | 0.516:1/20.62 | 346,41 | 6.83 | 19,67 | Helical 109 | 512 × 512 | Large (50 cm) |
