Table 1.
Sequences and Protocols Used for 3 T and 7 T
| T1 MP2RAGE 3D |
T2 TSE 2D |
FLAIR TSE 2D |
T2* GRE |
FLAIR SPACE 3D |
DWI Single Shot |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | |
| Voxel dimensions | 0.9 × 0.9 | 0.8 × 0.8 | 0.5 × 0.5 | 0.4 × 0.4 | 0.7 × 0.7 | 0.7 × 0.7 | 0.7 × 0.7 | 0.3 × 0.3 | 1.1 × 1.0 | 0.7 × 0.7 | 1 × 1 | 1 × 1 |
| Matrix size | 228 × 256 | 300 × 320 | 345 × 448 | 388 × 528 | 240 × 320 | 240 × 320 | 240 × 320 | 520 × 640 | 194 × 256 | 320 × 320 | 222 × 222 | 222 × 222 |
| No. slices | 160 | 192 | 23 | 34 | 23 | 34 | 72 | 96 | 160 | 144 | 23 | 34 |
| Field of view, mm2 | 208 × 230 | 225 × 240 | 173 × 230 | 169 × 230 | 173 × 230 | 173 × 230 | 173 × 230 | 169 × 208 | 211 × 250 | 230 × 230 | 230 × 230 | 230 × 230 |
| Slice thickness, mm | 0.9 | 0.8 | 5 | 3 | 5 | 3 | 1.7 | 1.2 | 1 | 1 | 5 | 3 |
| TE, ms | 5 | 4.13 | 111 | 69 | 127 | 123 | 20 | 15 | 298 | 467 | 90 | 56 |
| TI, ms | 2500 | 2600 | ||||||||||
| TR, ms | 5000 | 5000 | 4560 | 7000 | 8500 | 9000 | 28 | 27 | 7000 | 9000 | 4200 | 4500 |
| TA, min:s | 8:02 | 8:02 | 3:36 | 3:39 | 4:00 | 3:56 | 5:24 | 5:16 | 7:14 | 7:14 | 2:05 | 2:24 |
| GRAPPA factor | 2 | 3 | 2 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 4 | |
| RB/pixel, Hz/pixel | 170 | 180 | 169 | 287 | 150 | 244 | 120 | 140 | 300 | 460 | 1186 | 1186 |
| FA, degree | 4 | 4 | 180 | 180 | 180 | 180 | 15 | 15 | 15 | 15 | 180 | 180 |
| Fat saturation | Yes | Yes | ||||||||||
|
fMRI |
T2 SPACE 3D |
DWI RESOLVE |
T1 FLASH |
DIR SPACE 3D |
||||||||
| 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | 3 T | 7 T | |||
| Voxel dimensions | 2.4 × 2.4 | 1.4 × 1.4 | 0.7 × 0.7 | 0.7 × 0.7 | 1.3 × 1.3 | 1.2 × 0.9 | 0.5 × 0.5 | 0.5 × 0.4 | 1.3 × 1.3 | 1.1 × 1.0 | ||
| Matrix size | 96 × 96 | 160 × 160 | 288 × 320 | 288 × 320 | 180 × 180 | 185 × 244 | 336 × 448 | 315 × 512 | 192 × 192 | 191 × 256 | ||
| No. slices | 44 | 84 | 128 | 160 | 28 | 34 | 23 | 34 | 144 | 144 | ||
| Field of view, mm2 | 230 × 230 | 224 × 224 | 207 × 230 | 207 × 230 | 230 × 230 | 230 × 230 | 173 × 230 | 173 × 230 | 250 × 250 | 212 × 256 | ||
| Slice thickness, mm | 2.4 | 1.4 | 1 | 0.9 | 5 | 3 | 5 | 3 | 1.3 | 1 | ||
| TE, ms | 26 | 20 | 121 | 87 | 63 | 58/97 | 4.9 | 3 | 324 | 322 | ||
| TI, ms | 3000 | 3120 | ||||||||||
| TR, ms | 3000 | 3870 | 2000 | 2000 | 4100 | 6000 | 253 | 250 | 7400 | 8000 | ||
| TA, min:s | 7:47 | 7:45 | 6:06 | 6:20 | 4:14 | 4:32 | 2:18 | 2:16 | 6:12 | 6:10 | ||
| GRAPPA factor | 3 | 4 | 2 | 3 | 2 | 3 | 2 | 2 | 3 | |||
| RB/pix, Hz/pix | 1212 | 1738 | 363 | 446 | 731 | 732 | 170 | 210 | 789 | 592 | ||
| FA, degrees | 90 | 90 | 90 | 90 | 180 | 180 | 80 | 30 | ||||
| Repetitions | 150 | 120 | ||||||||||
MP2RAGE indicates magnetization prepared rapid acquisition gradient echo sequence with bias field correction; T2 TSE 2D, 2D turbo spin echo; FLAIR TSE 2D, 2D FLAIR TSE; T2* GRE, T2*-weighted gradient echo sequence; FLAIR SPACE 3D, 3D FLAIR TSE with variable flip angle; fMRI, functional MRI.