MR imaging protocol and technique
| Parameters | 1.5T | 3T |
|---|---|---|
| Head coil | Quadrature | Receive-only phased array |
| Number of channels | 4 | 8 |
| Pulse sequence | 2D fast FLAIR | 2D fast FLAIR |
| FOV (cm) | 24 × 24 | 25 × 25 |
| Matrix size | 256 × 256 | 256 × 256 |
| Section thickness (mm) | 2 (no gap) | 2 (no gap) |
| TR (ms) | 10,000 | 9,000 |
| TE (ms) | 125 | 157 |
| Inversion time (ms) | 2700 | 2250 |
| NSA | 3 | 1 |
| Flip angle | 90° | 90° |
| Pixel size (mm) | 0.938 × 0.938 × 2 | 0.976 × 0.976 × 2 |
| Scanning time (min) | 8.2 | 9.1 |
Note:—NSA indicates number of signal averages; FLAIR, fluid-attenuated inversion recovery.