Table 1 Magnetic resonance imaging (MRI) parameters
Parameter | T1-weighted MPRAGE | T2-weighted FLAIR | Diffusion-weighted Images | Field map |
|---|---|---|---|---|
Scan timing | ||||
 Echo time (TE, ms) | 2.93 | 82 | 130 | 5.19 / 7.65 |
 Repetition time (TR, ms) | 2300 | 6000 | 8900 | 400 |
 Inversion time (TI, ms) | 900 | 2070 | – | – |
 Flip angle (°) | 9 | 125 | 90 | 60 |
 Bandwidth (BW, Hz/pixel) | 241 | 200 | 992 | 260 |
 Echo train length (ETL) | 1 | 24 | 1 | 1 |
 b-values | – | – | 0, 3000 | – |
Acquisition timing | ||||
 Frequency (number of pixels) | 240 | 320 | 120 | 64 |
 Phase (number of pixels) | 256 | 320 | 120 | 64 |
 Phase field of view (FOV, %) | 0.94 | 1.00 | 1.00 | 100 |
 Gradient directions | – | – | 64 | – |
 b-zeros | – | – | 1 | – |
Scanning range | ||||
 FOV (mm) | 253 × 270 | 250 × 250 | 240 × 240 | 192 × 192 |
 Spacing (mm) | 1.05 | 0.78 | 3 | 3.75 |
 Slice thickness (mm) | 1.2 | 2.5 | 2 | 3 |
 Slices | 192 | 60 | 50 | 36 |