Table 1.
MRI scan parameters for T1-weighted, T2 measurements and STEAM diffusion scans
| T1 weighted | T2 | Diffusion | |
|---|---|---|---|
| Imaging sequence | Turbo spin-echo (TSE) | Multi-echo, spin-echo (MESE) | STEAM-EPI |
| TR: repetition time (ms) | 697 | 1500 | 6300 |
| TE: echo time(s) (ms) | 9.1 | 9.6:9.4:153.6 (16 echos) | 42.2 |
| Field of view (mm) | 300 × 300 | 300 × 300 | 300 × 300 |
| Slice thickness (mm) | 5 | 5 | 5 |
| Fat suppression | STIR | SPAIR | SPAIR |
| Acquisition matrix | 256 × 256 | 256 × 256 | 256 × 256 |
| Number of slices | 60 | 5 | 5 |
| Number of averages | 1 | 1 | 8 |
| Receiver bandwidth (Hz/pixel) | 222 | 510 | 1502 |
| Flip angle (°) | 90 | 15 | - |
| GRAPPA | - | - | 2 |
| b values (s/mm2) | - | - | 0, 500 |
| Directions | - | - | 6 |
| Mixing time (Tm) (ms) | - | - | 980 |
| Diffusion time (∆) (ms) | - | - | 1000 |
| Acquisition time (min:s) | 2:19 | 2:05 | 6:12 |