Table 1.
Scan Parameters of All Sequences for 3T and 7T
| Sequence | PD Weighted image (3T/7T) | AFI B1map (3T/7T) | T2w (3T) | T2w (7T) | T2w (7T) | T2w (7T) |
|---|---|---|---|---|---|---|
| Sequence type | M2D FFE | 3D FFE | M2D TSE | 2D TSE | ||
| TR | 10000 msec | 50 ms, 200 msec TR extension | 5900 msec | 2500 msec | ||
| TE | 5 msec | 2.6 msec | 100 msec | 90 msec | ||
| Flip angle | 90° | 65° | 90°/180° refocusing pulse | 90°/180° refocusing pulse | ||
| FOV | 320 × 440 × 44 mm3 | 240 × 422 × 50 mm3 | 200 × 200 × 90 mm3 | 200 × 200 × 3 mm3 | ||
| Voxel size | 5 × 10 × 10 mm3 | 3.9 × 3.8 × 10 mm3 | 0.78 × 0.78 × 3 mm3 | 0.78 × 0.78 × 3 mm3 | 0.5 × 0.5 × 3 mm3 | 0.35 × 0.35 × 3 mm3 |
| Slices | 3 | 5 | 30 | 1 | ||
| TSE factor | — | — | 29 | 17 | ||
| Acquisition time | 1305 sec | 105 sec | 176 sec | 25 sec | 39 sec | 56 sec |
| Receive bandwidth | 1011 Hz | 110 Hz (3T) and 257 Hz (7T) | — | — | — | — |
| Nominal B1 | 12 μT | 13.46 μT (3T) and 11.8 μT (7T) | — | — | — | — |
| Pulse width | 3.866 msec | 2.48 ms (3T) and 2.99 msec (7T) | — | — | — | — |
| Acceleration factor | R=1 | R=1 | R=1.5 | R=1.5 |