Table 1 MRI acquisition details of the T2-TSE, DTI and IVIM protocols
Sequence | T2-TSE | DTI | IVIM |
|---|---|---|---|
Respiratory correction | Breath hold | Trigger | Trigger |
Scan time per breath hold/ respiration | 00:15.6 | 0:02.8 | 0:03.0 |
Acquisition plane | Coronal | Coronal | Coronal |
Field of view | 450 × 450 | 336 × 204 | 336 × 204 |
TSE factor | 20 | – | – |
TR/TE (ms) | 1200/80 | 2799/47 | 3007/56 |
Startup echoes | 0 | – | – |
b-value (s/mm2) | – | 0, 100, 300 | 0, 10, 25, 40, 75, 100, 200, 300, 500, 700 |
Flip angle (deg) | 90 | – | – |
Gradient directions | – | 15 | 6 |
EPI factor (ETL) | – | 61 | 61 |
SENSE factor | 2 | 1.5 | 1.5 |
Acquisition matrix | 412 × 281 | 112 × 67 | 112 × 67 |
Acquisition voxel size (mm3) | 1.09 × 1.60 × 3.0 | 3.0 × 3.0 × 3.0 | 3.0 × 3.0 × 3.0 |
Half Fourier scan factor | 0.599 | 0.655 | 0.655 |
Slice thickness/gap (mm) | 3.0 /− | 3.0/− | 3.0/− |
Number of slices | 25 | 30 | 30 |
Number of averages | 1 | 1 (b = 0, 6) | 1 (b = 0, 4) |
Type of fat suppression | No | SPIR | SPIR |
Total acquisition time (min, without trigger) | 00:33.6 | 01:51.0 | 02:57.4 |