Table 1 Parameters for WBMRI
MRI Parameter | Spine imaging | Skull vertex to mid-thighs imaging | |||
|---|---|---|---|---|---|
T1-weighted | T2-weighted | T2- weighted | Gradient-Echo Dixon | Diffusion-weighted imaging | |
Imaging sequence | TSE | TSE | HASTE | 3D gradient echo (FLASH) | EPI |
Orientation | Sagittal | Sagittal | Axial | Axial | Axial |
Number of stations | 2 | 2 | 5–6 | 5–6 | 5–6 |
Slice thickness (mm) | 4 | 4 | 5 | 5 | 5 |
Slices per station | 15–17 | 15–17 | 40 | 40 | 40 |
Slice gap | 10% | 10% | 0 | 0 | 0 |
Field of view | 400–440 | 400–440 | 380–430 | 430 | 430 |
Matrix | 384–448 | 448–512 | 256–320 | 160–256 | 128–134 |
Resolution | 1–1.1 | 1 | 0.8–1.6 | 0.8–2.7 | 1.6–3.4 |
Parallel imaging | 2 x (24–38) | 2x (30–38) | 2x (24–42) | 3 × 32 or 2 × 24 | 2 × 32 |
TE (ms) | 11 | 83–97 | 82–89 | 2.38/4.76 | 64–69 |
TR (ms) | 643–683 | 3110–3790 | 1000–1400 | 6.82–7.63 | 6150–11,500 |
Flip angle (degrees) | 150 | 150 | 170 | 3, or 14–20 |  |
b values (s/mm2) | - | - | - | - | 50, 60, 900 |
Fat suppression | None | None | None | Dixon | STIR |
Breathing instructions | Free breathing | Free breathing | Breath hold | Breath hold | Free breathing |
Acquisition time per station (min:s) | 0:59 -1:36 | 1:08–1:22 | 0:42–0:56 | 0:16–0:19 | 3:35—6:25 |