Table 1.
MRI parameters
| SIR | R 2 | R 2* | |
|---|---|---|---|
| Technique | GRE | SE | GRE |
| TR (ms) | 120 | 3000–4000a | 300 |
| TE1 (ms) | Variable [7] | 6.2 | 0.99 |
| ΔTE (ms) | n/a | 6.2 | 1.41 |
| Number of echoes | 1 | 16 (multiecho) | 12 (multiecho) |
| FA (°) | Variable [7] | 180 | 20 |
| FOV (mm × mm) | 380 × 285 | 380 × 285 | 380 × 285 |
| Acquisition matrix | 256 × 256 | 256 × 256 | 128 × 96b |
| Reconstruction matrix | 256 × 192 | 256 × 192 | 256 × 192 |
| Parallel imaging | No | GRAPPA | GRAPPA |
| Acceleration factor | n/a | 2 | 2 |
| Bandwidth (Hz/pixel) | 140 | 465 | 1963 |
| Slice thickness | 10 | 10 | 10 |
| Slice gap | Variablec | Variablec | Variablec |
| Number of slices | 3 | 3 | 3 |
| Acquisition time | 100 s (5 × 20 s) | 9–16 mina | 20 s |
aDepending on the patient’s respiratory frequency: one TR per respiratory cycle
bZero-padding was used to fit R 2* acquisition in breath-hold time (20 s)
cThe slice gap was adjusted per patient so as to cover the whole liver with the three slices