Table 1.
Liver magnetic resonance imaging parameters
| SSFSE T2 weighted image | IDEAL-IQ for PDFF and R2* (1/T2*) map | MRE | IVIM | |
| Acquisition plane | Axial | Axial | Axial | Axial |
| Acquisition scheme | Breath hold | Breath hold | Breath hold | Free breathing |
| TR (millisecond) | 540 | 5.9 | 1000 | 6000 |
| TE (millisecond) | 80 | 2.6 | 62 | 74 |
| Acquisition matrix | 320 × 256 | 128 × 128 | 64 × 64 | 128 × 128 |
| Field of view (cm) | 40 | 42 | 38 | 38 |
| Slice/internal thickness (mm) | 8 | 8 | 8 | 4 |
| Gap (mm) | 10 | 8 | 2 | 5 |
| Flip angle (°) | 90 | 3 | 90 | 90 |
| Number of signal averages | 0.64 | 0.69 | 2 | 2 → 1 |
| Notes | Six gradient echoes (from 0.9 to 4.4 millisecond) | 60 Hz MEG (20% driver power reduction) | Eight b-values (15, 27.3, 49.8, 90.7, 165.3, 301.2, 548.8, 1000) | |
| Scan time (min) | 0:12 | 0:16 | 0:24 (or 0:12 × 2 times) | 4:30 |
SSFSE: Single shot fast spine echo; PDFF: MR proton density fat fraction; MRE: MR elastography; IVIM: Intravoxel incoherent motion; TR: Repetition time; TE: Echo time; MEG: Motion encoding gradient.