TABLE 1.
Imaging protocol parameters
| Parameters | T1WI | T2WI | DWI | IVIM | DCE-MRI |
|---|---|---|---|---|---|
| Sequence | 2D-FSE | 2D-FSE | 2D-SS-EPI | 2D-SS-EPI | 3D-LAVA |
| Orientation | Oblique Axial | Oblique Axial | Oblique Axial | Oblique Axial | Oblique Axial |
| TR/TE (ms) | 659/12.3 | 6000/95 | 3708/74.3 | 2000/80.7 | 3.5/1.7 |
| FOV (cm2) | 40 × 40 | 40 × 40 | 40 × 40 | 40 × 40 | 36 × 36 |
| Matrix | 288 × 192 | 320 × 320 | 96 × 128 | 128 × 192 | 288 × 192 |
| Flip angle (°) | 160 | 160 | 90 | 90 | 15 |
| Slice thickness (mm) | 6 | 6 | 6 | 6 | 6 |
| No. of sections | 20 | 20 | 20 | Based on lesion's size | 26 |
| NEX | 1 | 1 | 1, 4 | 1, 1, 1, 1, 1, 1, 2, 4, 4, 6 | 0.73 |
| Fat suppression | / | STIR | STIR | STIR | FLEX |
| b-values (s/mm2) | / | / | 0, 800 | 0, 20, 40, 80, 160, 200, 400, 600, 800, 1000 | / |
| Respiratory compensation | Free | Free | Free | Free | Free |
| Scan time | 1 min 56 s | 48 s | 1 min 04 s | 3~6min | 6 min 08 s (40 phases) |
DCE-MRI = dynamic contrast-enhanced magnetic resonance imaging; DWI = diffusion-weighted imaging; FOV = field of view; FLEX = FLEXible; FSE = fast spin echo; IVIM = intravoxel incoherent motion; LAVA = liver acquistion with volume assessmeNT; NEX = number of excitations; SS-EPI = single shot echo planar imaging; STIR = short-inversion time(TI) recovery; TR/TE = repetition time/echo time; T1WI = T1-weighted imaging; T2WI = T2-weighted imaging