Table 2.
Imaging parameters of quantitative MRI protocol.
| Sequence | T2-mapping 2D T2w-FSE | 2D Multi-shell DTI-EPI | 3D, 2-echo Dixon GRE | 2D B1+ mapping |
|---|---|---|---|---|
| Scan time (min:sec) | 4:12 | 4:56 | 0:48 | 0:44 |
| Orientation | Axial | Axial | Axial | Axial |
| Field-of-view (FOV) (cm) | 27.0 | 27.0 | 34.0 | 27.0 |
| TR/TE (ms) | 2400/10–80 | 3300/56 | 4.2/1.2, 2.5 | 11/7 |
| Matrix size (frequency x phase) | 192 × 128 | 90 × 90 | 256 × 256 | 64 × 64 |
| Phase FOV factor | 1.50 | - | - | - |
| Slice thickness (mm), Spacing | 4.0, 1.0 | 3.0, - | 1.8, - | 5.0, - |
| Slices | 26 | 35 | 96 | 26 |
| Bandwidth (kHz) | ±15.6 | ±250.0 | ±142.9 | ±15.6 |
| Echo train length | 8 | 51 | 2 | - |
| Parallel imaging factor (phase) | 2 | 1.5 | 1.5 | - |
| GRE Flip Angle (°) | - | - | 10 | 10 |
| b-values (s/mm2) [# directions] | - | 0 [2] 375 [13] 750 [27] [Total=40] |
- | - |
| Fat suppression method | None | Spectral-spatial pulse | Dixon | None |
FSE: fast/turbo spin echo, DTI: diffusion tensor imaging, GRE: gradient recalled echo, TR: repetition time, TE: echo time