Table 1.
MR hardware and sequence parameters
| Field Strength | 3.0T | ||
| Equipment | 3.0T HDX Twinspeed | ||
| Manufacturer | GE | ||
| Gradient trength | 50mT/m | ||
| Slew rate | 150 T/m/s | ||
| Coil type | 8 Channel Cardiac Array | ||
| Approximate examination time | 20–30 min | ||
| Sequence name | FRFSE | EPI DWI | FSPGR |
| Fast Recovery Fast Spin Echo | Echoplanar Imaging | Fast Spoiled Gradient Echo | |
| Diffusion-Weighted Imaging | |||
| Imaging mode | 2D | 2D | 2D |
| Weighting | T2 | DWI | T1 |
| Scan planes | Axial, Sagittal and Coronal | Axial, Sagittal and Coronal | Axial |
| TR (ms) | 5240 | 5000 | 120 |
| TE (ms) | 106 | 56.9 | 2.1 (In Phase) |
| Flip angle | 90 | 90 | |
| Number of excitations | 1 | 8 | 1 |
| Receive bandwidth (kHz) | 250 | 41.67 | |
| Frequency matrix | 384 | 100 | 288 |
| Phase matrix | 224 | 152 | 192 |
| Slice thickness | 4.5 | 5 | 6 |
| Slice spacing | 1 | 1.5 | 2 |
| Voxel size (mm) | 1.6 × 0.93 × 4.5 | 3.6 × 2.36 × 5 | 1.25 × 1.875 × 6 |
| Field of view (mm) | 360 | 360 | 360 |
| Echo train length | 20 | ||
| b value | 500 | ||
| Diffusion direction | All | ||
| Approx acquisition time (min:s) | 02:21 | 02:45 | 00:48 |
| Frequency voxel size | 0.9375 | 3.6 | 1.25 |
| Phase voxel size | 1.607142857 | 2.368421053 | 1.875 |
TE, echo time; TR, repetition time.