Table 2.
1.5T and 3T brain MRI acquisition protocols
| 1.5T | 3T | |
|---|---|---|
| Scanner manufacturer | GE Signa LX | Siemens Skyra |
| Operation system version | 11× | D13 |
| Coil | Quadrature head coil | 20-channel head and neck coil |
| Type of sequence | 3D SPGR | 3D MPRAGE |
| Acceleration factor for parallel imaging | N/A | 2 |
| Orientation | Sagittal | Sagittal |
| Field of view (cm) | 24 × 24 | 24 × 25.6 |
| Matrix size | 256 × 256 | 240 × 256 |
| Number of slices | 166 | 176 |
| Repetition time (msec) | 8.176 | 2300 |
| Echo time (msec) | 3.856 | 2.96 |
| Flip angle (degrees) | 20 | 9 |
| Voxel size (mm) | 0.938 × 0.938 × 1.2 | 1.0 × 1.0 × 1.0 |
| Scan time (minutes) | 6:24 | 5:12 |
| Number of signal averages | 1 | 1 |
Key: SPGR spoiled gradient recalled echo, MPRAGE magnetization-prepared rapid acquisition gradient echo