Table I.
MRI parameters.
| Sequence | |||
|---|---|---|---|
| Parameters | Axial FSE T2WI | Axial LAVA Flex | DWI |
| Repetition time, ms | 10,000 | 4.3 | 6600 |
| Echo time, ms | 70 | 1.6 | 81.5–82.3 |
| Slice thickness, mm | 4.0 | 4.0 | 4.0 |
| Slice gap, mm | 0.5 | 0 | 1.0 |
| Matrix size, slices | 320×320 × NS | 260×210 × NS | 128×128 × NS |
| Field of view, mm | 360×360 | 360×324 | 380×304 |
| Number of excitationsa | 1.5 | 1 | 1-8 |
| Flip angle, ° | 110 | 14 | 90 |
| Bandwidth, Hz/pixel | 62.5 | 200 | 250 |
| Acquisition Time, sec | 120-240 | 11 | 480-660 |
a
Specific number of excitations for each b-value is as follows: 10 (4), 20 (2), 40 (1), 60 (1), 80 (1), 100 (1), 150 (2), 200 (2), 400 (4), 800 (4), 1,000 (6), 1,200 (6), 1,500 (6) and 2,000 (8) s/mm2; the numbers in brackets represent the number of excitations. FSE, fast spin echo; T2WI, fast spin echo transverse relaxation time-weighted imaging; LAVA, liver acquisition with volume acceleration; DWI, diffusion weighted imaging; NS, number of slices.