Table 2.
Sequence parameters.
| Sequence | FOV (mm) | Matrix size | Nominal Voxel size (mm3) | Flip angle (°) | TR (ms) | TE (ms) | TI (ms) | BW (Hz/Px) | Slices | VENC (cm/s) |
|---|---|---|---|---|---|---|---|---|---|---|
| TOF | 220 | 256 × 192 | 0.86 × 1.15 × 5 | 20 | 17 | 5.56 | N/A | 78 | 50 | N/A |
| T1-MPRAGE | 224 | 224 × 224 | 1 × 1×1 | 8 | 2200 | 2.43 | 900 | 250 | 160 | N/A |
| CBF calibration scan | 176 (neck) 208 (head) | 208 × 208 | 0.85 × 0.85 × 5 (neck) 1.00 × 1.00 × 5 (head) | 15 | 48 | 5.35 (neck) 5.63 (head) | N/A | 320 | 1 (neck) 1 (head) | 50 (neck) 80 (head) |
| Radial PC-MRI | 240 | 240 × 240 | 1 × 1×5 | 15 | 38 | 5.5 | N/A | 278 | 1 | 76 |
| MB-EPIa | 240 | 80 × 80 | 3 × 3×3 | 40 | 66.4 | 30 | N/A | 2718 | 6 | N/A |
a
Six slices/TR (multi-band acceleration factor = 6), MB-EPI cycle repeated 11 times to achieve full brain coverage (66 slices) in 750 ms.
TOF: time of flight; T1-MPRAGE: T1-weighted magnetization prepared rapid gradient echo; PC-MRI: phase-contrast MR imaging; MB: multiband; EPI: echo-planar imaging; FOV: field-of-view; TR: repetition time; TE: echo time; TI: inversion time; BW: pixel band-width; VENC: velocity encoding.