Table 1.
Selected technical parameters for the most important sequences in cardiovascular MRI in neonates and young children
| Parameter | 4-D flow MRI | 2-D phase contrast | Cine SSFP | MR angiography |
|---|---|---|---|---|
| Breath-hold | No | If possible | Yes | Yes |
| Gating | ECG | ECG | ECG | No |
| Repetition time (ms) | 4.3–4.5 | 6.6 | 4.0 | 3.7 |
| Echo time (ms) | 2.5 | 3.6 | 1.7 | 1.5 |
| Field of view (mm) | 250–320 | 180–240 | 200–240 | 220–300 |
| Matrix | 160–200×160–200 | 256×128 | 192×224 | 320×160–224 |
| Slice thickness (mm) | 1.6–1.8 | 4.0 | 4.0–5.0 | 1.6–2.4 |
| Views per segment | 2 | 6 | 8/16 | – |
| Flip angle (°) | 15 | 20 | 45 | 30 |
4-D four-dimensional, ECG electrocardiogram, MR magnetic resonance, MRI magnetic resonance imaging, SSFP steady-state free precession