Table 1.
Imaging parameters of non-contrast-enhanced REACT cardiovascular magnetic resonance angiography (CMRA) and contrast-enhanced steady-state- and first-pass-CMRA
| REACT–CMRA | Steady–state–CMRA | First–pass–CMRA | |
|---|---|---|---|
| Orientation | Coronal | Coronal | Coronal |
| Acquisition matrix (mm³) | 252 × 285 × 188 | 288 × 194 × 120 | 352 × 240 × 70 |
| Field of view (mm³) | 400 × 457 × 150 | 360 × 360 × 150 | 400 × 370 × 126 |
| Voxel size (mm³), acquired | 1.6 × 1.6 × 1.6 | 1.25 × 1.85 × 2.5 | 1.14 × 1.54 × 3.6 |
| Voxel size (mm³), reconstructed | 0.8 × 0.8 × 0.8 | 0.8 × 0.8 × 1.25 | 0.76 × 0.76 × 1.8 |
| T2 prep/inversion delay time (ms) | 50/~70 | –/270 | –/– |
| Fat suppression | Dual–echo Dixon | – | Subtraction |
| TR/TE1/TE2 (ms) | 5.8/1.72/3.8 | 3.2/1.01/- | 3.5/1.13/- |
| Electrocardiogram gating | Yes | Yes | No |
| Turbo field echo factor | 60 | 31 | – |
| Respiratory navigator gating | Yes | Yes | No (breath–holding) |
| Flip angle (degree) | 15 | 20 | 40 |
| Parallel imaging (SENSE) factor | 3.2 | 4 | 3.5 |
| Nominal acquisition duration (min) | 3:24 | 2:46 | 0:56 |
REACT relaxation-enhanced angiography without contrast and triggering, TR time of repetition, TE time of echo, SENSE sensitivity encoding