Table 1. Scan parameters for the different sequences in HUNT MRI.
| MRI sequence | Matrix size | NSA | TR (ms) | TE (ms) | Flip-angle | Slice thickness (mm) | Gap (mm) | Overlap (mm) | FOV (mm) |
|---|---|---|---|---|---|---|---|---|---|
| IR-FSPGR | 192x192 | 1 | 10.2 | 4.1 | 10° | 1.2 | 0 | 0 | 240 |
| T2W | 512x320 | 2 | 7840.0 | 95.3 | 90° | 4.0 | 1 | 0 | 230 |
| T2* W | 256x192 | 1 | 500.0 | 20.0 | 20° | 4.0 | 1 | 0 | 230 |
| FLAIR | 256x224 | 1 | 11,002.0 | 122.9 | 90° | 4.0 | 1 | 0 | 230 |
| TOF-angio 3D | 320x224 | 1 | 24.0 | 2.7 | 20° | 1.0 | 0 | 5.0 | 200 |
All imaging was performed on the same 1.5 T General Electric Signa HDx 1.5 T magnetic resonance imaging (MRI) scanner equipped with an eight channel head coil and software version pre-14.0M4. IR-FSPGR, inversion recovery prepared fast spoiled grass; GRE, gradient echo; T2W, T2 weighted; T2*W, T2* weighted; FLAIR; fluid attenuated inversion recovery; ToF-angio, Time of flight angiography; NSA, number of signal averages; TR, repletion time; TE, Echo time; FOV, field of view.