Table 1.
Readout trajectories and experimental details.
| Parameter | 2D radial | 2D spiral | 3D radial | 3D spiral | 3D spiral (high-res) |
|---|---|---|---|---|---|
| Gradient amplitude (mT/m) | 10 | 16 | 10 | 18 | 10 |
| Slew rate (T/m/s) | 70 | 80 | 70 | 60 | 90 |
| Field of view (mm) | 200 | 200 | 200 | 200 | 192 |
| Matrix (mm) | 200 | 200 | 200 | 200 | 200 |
| Resolution (mm2/mm3) | 1 | 1 | 1 | 1 | 0.96 |
| Waveform duration (ms) | 4.15 | 4.91 | 4.15 | 4.85 | 6.88 |
| Acquired k-space samples per interleave | 496 | 920 | 496 | 876 | 1,348 |
| Sampling time (ms) | 1.98 | 3.68 | 1.98 | 3.50 | 5.39 |
| TE (ms) | 2.08 | 0.46 | 2.08 | 0.46 | 0.46 |
| Number of in-plane interleaves | 987 | 377 | – | 55 | 48 |
| Number of spherical rotations | – | – | – | 880 | 576 |
| Total interleaves | 987 | 377 | 63,160 | 48,400 | 27,648 |
| Acquired interleaves | 880 | 880 | 49,280 | 49,280 | 28,224 |
| Acquisition time @1.5 T | 10.56 s | 10.56 s | 9:51 min | 9:51 min | – |
| Acquisition time @3 T | 9.24 s | 9.24 s | 8:37 min | 8:37 min | 4:55 min |