Table 1.
Acquisition parameters of contrast-enhanced first-pass cardiovascular magnetic resonance angiography (CMRA) and modified Dixon (mDixon) steady-state CMRA
| Parameter | First-pass CMRA | mDixon steady-state CMRA |
|---|---|---|
| Time of echo (msec) | 1.60 | 1.93 |
| Time of repetition (msec) | 5.0 | 5.1 |
| Total scan duration (min) | 1:02 (15.2 s./per dynamic) | 1:56 |
| Acquired voxel size (mm) | 1.7 × 1.7 × 3.4 | 1.20 × 1.20 × 2.40 |
| Reconstructed voxel size (mm) | 1.61 × 1.61 × 1.7 | 0.62 × 0.62 × 1.2 |
| Turbo field echo factor | – | 19 |
| Field of view (mm) | 360 × 360 × 139 | 240 × 240 × 96 |
| Matrix (slices) | 212 × 212 × 82 | 200 × 199 × 80 |
| Compressed sensing | No | Yes, factor 6 |
| Parallel imaging factor | Yes. P reduction (RL) 4, S reduction (AP) 1 | No |
| Slice orientation | Coronal | Coronal |
| Number of slices | 82 | 80 |
| Fat suppression technique | Subtraction | mDixon |
| Flip angle | 30 | 20 |
| Cardiac synchronization device | − | ECG |
| Respiratory compensation | − | Navigator respiratory compensation gating. Gating window 2 (7) |
| Maximum intensity projection (slice thickness/gap, mm) | 3.4/1.7 | 4/2 |
| Acquisition mode | Cartesian | Cartesian |
ECG, electrocardiogram; AP, Anterior Posterior; RL, Right-left