Table 1 Imaging sequence parameters
Parameters | Axial T2WI | Routine DWI | Multi-b value DWI |
|---|---|---|---|
Scanning sequence | FRFSE | single-shot SE-EPI | single-shot SE-EPI |
Repetition time (ms) | 5964 | 4607 | 4607 |
Echo time (ms) | 130 | 58.4 | 78.8 |
Field of view (mm) | 220 × 220 | 400 × 320 | 400 × 320 |
Matrix | 352 × 256 | 128 × 128 | 128 × 128 |
Intersection gap (mm) | 0.3 | 0.5 | 0.5 |
Slice thickness (mm) | 3.0 | 5.0 | 5.0 |
Number of slices | 30 | 40 | 40 |
b-values | NA | 0, 1000 | 0, 10, 20, 40, 80, 150, 200, 400, 800, 1000, 1200, 1500, 1700, 2000, 2500, 3000, 3500 |
Number of averages | 2 | 1, 8 | 1 ~ 8* |
Diffusion direction | NA | ALL | ALL |
Number of directions | NA | 3 | 3 |
Respiratory motion mitigation | Free-breathing | Free-breathing | Free-breathing |
Flip Angle | 90° | 90° | 90° |
Acquisition time (min) | 6:33 | 2:00 | 13:45 |