Table 1 MRI sequence parameters
Parameters | T1WI | T2WI | DKI | T1 mapping (pre-/post-contrast-enhanced) | B1 map for T1 mapping | Pre-/Post-contrast T1WI |
|---|---|---|---|---|---|---|
Imaging technique Orientation | TSE Axial | TSE Axial | RESOLVE Axial | 3D VIBE Axial | Turbo-Flash Axial | 3D VIBE Axial |
TR (ms) | 450 | 3000 | 4160 | 5.01 | 8980 | 6.16 |
TE (ms) | 18 | 116 | 51 | 2.3 | 1.83 | 3 |
Field of view (mm2) | 320 × 320 | 180 × 180 | 320 × 240 | 380 × 304 | 380 × 309 | 320 × 320 |
Slice thickness (mm) | 4 | 4 | 4 | 4 | 8 | 2 |
No. of slices | 25 | 25 | 25 | 32 | 32 | 60 |
Acquisition matrix | 448 × 314 | 384 × 288 | 192 × 144 | 224 × 168 | 64 × 52 | 320 × 240 |
Voxel size (mm3) | 0.7 × 0.7 × 4.0 | 0.7 × 0.5 × 4.0 | 1.7 × 1.7 × 4.0 | 0.8 × 0.8 × 4.0 | 6.0 × 6.0 × 8.0 | 1.0 × 1.0 × 2.0 |
b-values (s/mm2) | NA | NA | 0, 500, 1000, 1500, 2000 | NA | NA | NA |
No. of directions | NA | NA | 3 | NA | 8 | NA |
Flip angle (degrees) | 180 | 160 | 180 | 3, 5, 8, 10, 13, 15 | Â | 9 |
Bandwidth (Hz/pixel) | 254 | 200 | 1002 | 300 | Â | 450 |
Acquisition time | 1Â min 33Â s | 3Â min 20Â s | 9Â min 38Â s | 30Â s | Â | 56Â s |