MRI protocol | Axial T2W SSFSE | Sagittal T2W FRFSE | Oblique-coronal/axial T2W FRFSE | Axial T1W GRE in-out (chemical shift) | Axial T2* | Axial DWI SE EPI | Sagittal, oblique-coronal/axial T1W 3D GRE LAVA |
---|---|---|---|---|---|---|---|
Repetition time/echo time (ms) | 765/59 | 4675/100 | 4675/100 | 180/2.1 | 650/11.8 | 3000/74.1 | 4.4/2.1 |
Flip angle | 90° | 90° | 90° | 80° | 20° | 90° | 12° |
Section thickness (mm) | 6 | 4 | 4 | 6 | 5 | 5 | 3.4 |
Interslice gap (mm) | 0.6 | 0.4 | 0.4 | 0.6 | 0 | 1 | −1.7 |
Bandwidth (kHz) | 31.25 | 41.67 | 41.67 | 62.5 | 8.33 | 250 | 62.5 |
Field of view (cm) | 38 | 32 | 32 | 38 | 25 | 46 | 40 |
Matrix | 320 × 288 | 320 × 224 | 320 × 224 | 256 × 224 | 256 × 256 | 160 × 160 | 320 × 192 |
No. of averages | 0.54 | 4 | 4 | 1 | 1 | 16 | 0.75 |
No. of images | 30 | 26 | 26 | 20 | 30 | 28 | 104 |
Frequency direction | Right to left | Anterior to posterior | Right to left | Anterior to posterior | Anterior to posterior | Superior to inferior | |
Acquisition time | 24 s | 3 min 49 s | 3 min 49 s | 22 s | 1 min 28 s | 3 min 18 s | 22 s |
b value (s/mm2) | – | – | – | – | – | 0–800 | – |