Sequence/parameters | T2-weighted turbo spin-echo | T2-weighted Dixon | Proton density-weighted 3D Dixon | IVIM-DTI | IVIM-DTI with MB factor 2 |
---|---|---|---|---|---|
FOV (mm3) (AP × RL × FH) | 250.5 × 450 × 237.5 | 120 × 450 × 450 | 252 × 480 × 200 | 252 × 480 × 200 | 252 × 480 × 210 |
Voxel size (mm3) | 0.375 × 0.375 × 2.5 | 4 × 0.39 × 0.39 | 1.5 × 1.5 × 2.5 | 3 × 3 × 5 | 3 × 3 × 5 |
Slices | 2 × 95 | 30 | 80 | 40 | 42 |
Slice orientation | Axial | Coronal | Axial | Axial | Axial |
Turbo factor | 15 | 14 | – | – | – |
Repetition time (ms) | 4,969 | 2,921 | 8.1 | 5,914 | 3,365 |
Echo time (ms) | 70 | 60 | 1.35 (Δ TE 1.1) | 55 | 60 |
Flip angle | 90 | 90 | 3 | 90 | 90 |
Bandwidth (Hz) | 224 | 245.9 | 1,430.8 | 3,064.3 | 3,058 |
b-value (s/mm2) (gradient directions) | – | – | – | 0 (8 ×), 5 (3 ×), 10 (3 ×), 20 (3 ×), 50 (3 ×), 100 (3 ×), 200 (10 ×), 400 (10 ×), 600 (12 ×) | 0 (8 ×), 5 (3 ×), 10 (3 ×), 20 (3 ×), 50 (3 ×), 100 (3 ×), 200 (10 ×), 400 (10 ×), 600 (12 ×) |
Fat suppression | – | – | – | SPAIR + GRFS | SPAIR + GRFS |
SENSE factor | 2 | 2.8 | 3 (RL) / 2 (FH) | 1.5 | 1.5 |
Partial Fourier | – | – | – | 0.8 | 0.8 |
Number of excitations | 1 | 1.3 | 3 | 2 | 2 |
Scan time (min:s) | 2 × 4:18 | 4:40 | 1:53 | 11:08 6:27a | 6:20 3:40a |