Table 1 Sequence parameters
| Â | Standard BH technique | Spiral real-time technique |
|---|---|---|
Field of view (mm) | 350 | 350 |
Rectangular field-of-view (%) | 75 | 100 |
Matrix size | 240 × 180 | 208 × 208 |
Number of slices | ~ 13 (range: 10–17) | ~ 13 (range: 10–17) |
Image resolution (mm) | 1.46 × 1.46 × 8 | 1.68 × 1.68 × 8 |
TE/TR (ms) | 1.16/2.32 | 0.67/3.34 |
Flip Angle (degree) | 67 | 67 |
Pixel Bandwidth (Hz/pixel) | 1225 | 1502 |
Cardiac gating | Retrospective | – |
Temporal resolution (ms) | 29.48 | 30.06 |
Reconstructed cardiac phases | 40 | ~ 24 (range: 20–37) |
Trajectory | Cartesian | Spiral |
Fully sampled spiral interleaves | – | 72 |
GRAPPA | ×2 | – |
Compressed Sensing | – | ×8 |
Breath-hold time per slice (sec) | 3.6–8.8 | – |
Total acquisition time for SAX (sec) | ~ 350 (range: 239–573) | ~ 20 (range: 11 to 36) |