TABLE 2.
MRI protocol.
| 3D MPRAGE | 3D TSE | DTI | SPGR | bSSFP | IR‐SPGR | |
|---|---|---|---|---|---|---|
| TR, ms | 2250 | 2900 | 7500 | 5.4 | 4.9 | 5.4 |
| TE, ms | 3.26 | 428 | 82 | 2.5 | 9.8 | 2.5 |
| Flip angle, degrees | 9 | 120 | 90 | [3, 4, 5, 6, 7, 9, 13, 18] | [9, 12, 15, 18, 21, 28, 40, 55] | 5 |
| Inversion time, ms | 900 | ‐ | ‐ | ‐ | 450 | |
| Resolution, mm | 1 × 1 × 1 | 1 × 1 × 1 | 2 × 2 × 2 | 1.7 × 1.7 × 1.7 | 1.7 × 1.7 × 1.7 | 2.3 × 2.3 × 3.5 |
| Gradient directions | ‐ | ‐ | 64 at b = 1000s/mm2 | ‐ | ‐ | ‐ |
| Phase cycling, degrees | ‐ | ‐ | ‐ | ‐ | [0, 180] | ‐ |
| Scan time, (min:s) | 07:17 | 05:07 | 08:06 | 05:21 | 2× 04:57 | 01:14 |
Abbreviations: 3D T1‐weigthed MPRAGE, magnetization‐prepared rapid gradient echo; 3D T2‐weighted TSE, turbo spin echo; DTI, diffusion tensor imaging; SPGR, spoiled gradient echo; bSSFP, balanced steady‐state free precession; IR‐SPGR, inversion‐prepared spoiled gradient echo.