Table 2 Relevant CT parameters for imaging patients with congenital heart disease using a dual-source CT system
From: Technical principles of computed tomography in patients with congenital heart disease
| Â | Paediatric patients | Adult patients |
|---|---|---|
Slice collimation | Thin collimation: 2 Ă— 64 Ă— 0.6Â mm | |
Thick collimation: 2 Ă— 24 Ă— 1.2Â mm | ||
Tube voltage / tube current | <20 kg: 80 kVp/50 mAs | BMI ≤25 kg/m2: 100 kVp/150 mAs |
20–30 kg: 80 kVp/80 mAs | (ECG-synchronised: 100 kVp/220 mAs) | |
30–50 kg: 80 kVp/150 mAs | BMI >25 kg/m2: 120 kVp/180 mAs | |
50–60 kg: 80 kVp/250 mAs | (ECG-synchronised: 120 kVp/330 mAs) | |
Gantry rotation time | 330Â ms | |
Pitch | 1 (non-ECG-synchronised CT) | |
0.2–0.5 (retrospective ECG-gated CT; pitch depending on the heart rate) | ||