Table 2.
Range of scanning parameters for T1 and most common T2-FLAIR protocols.
| Weighting | Sequence | # Scans | Field strength (T) | Coil | Slice thickness (mm) | Nominal in-plane resolution (mm) | TR (ms) | TE (ms) | TI (ms) | Flip angle (deg.) |
|---|---|---|---|---|---|---|---|---|---|---|
| T1 | 3D SPGR | 188 | 1.5 | Volume | 1.3 | 0.9 × 0.9 | ~9 | ~2 | none | 20 |
| 3D SPGR | 996 | 1.5 | Volume | 1.4 | 0.9 × 0.9 | ~9 | ~2 | none | 20 | |
| 3D SPGR | 38 | 1.5 | 8-Channel | 1.4 | 0.9 × 0.9 | ~10 | ~3 | none | 20 | |
| 3D SPGR | 110 | 1.5 | 8-Channel | 1.5 | 0.8 × 0.8 | ~9 | ~3.5 | 450 | 13 | |
| T2-FLAIR | 2D IR-SE | 1168 | 1.5 | Volume | 3 | 1.3 × 0.9 | ~10000 | ~145 | 2200 | 90 |
| 2D IR-SE | 37 | 1.5 | 8-Channel | 3 | 1.3 × 0.9 | ~10000 | ~125 | 2200 | 90 | |
| 2D IR-SE | 110 | 1.5 | 8-Channel | 3 | 1.3 × 0.9 | ~10000 | ~125 | 2250 | 90 |
Abbreviations. TR, repetition time; TE, echo time; TI, inversion time; FLAIR, fluid-attenuated inversion recovery; SPGR, spoiled gradient echo; IR-SE, inversion recovery-spin echo.