Table 1.
Technical details of the MRI study protocol
| Sequence name | Area of coverage | Orientation | TE (ms) | TR (ms) | FOV (mm2) | Matrix size | In-plane resolution (mm2) | Interpolation | Slice thickness (mm) |
|---|---|---|---|---|---|---|---|---|---|
| DWI (b-value 900 s/mm2) | Head to thighs | Axial, MPR → coronal | 56 | 7500 | 500 × 342 | 164 × 164 | 1.5 × 1.5 | On | 6 |
| DWI ishim | Neck | Axial | 64 | 5250 | 460 × 288 | 128 × 128 | 1.8 × 1.8 | On | 6 |
| T1 VIBE Dixon pre-contrast | Head to thighs | Axial | 2.39/4.77 | 6.69 | 500 × 360 | 320 × 240 | 1.6 × 1.6 | Off | 3 |
| T1 TSE | Whole body | Coronal | 8.4 | 690 | 500 × 375 | 384 × 288 | 1.3 × 1.3 | Off | 4 |
| T2 HASTE | Head to thighs | Axial | 80 | 1200 | 500 × 344 | 320 × 256 | 0.8 × 0.8 | On | 6 |
| TIRM | Whole body | Coronal | 56 | 4590 | 500 × 375 | 320 × 240 | 0.8 × 0.8 | On | 4 |
| FLAIR | Head | Axial | 120 | 7290 | 250 × 195 | 256 × 218 | 0.5 × 0.5 | On | 4 |
| T1 VIBE Dixon post-contrast | Whole body | Axial | 2.39/4.77 | 6.69 | 500 × 360 | 320 × 240 | 1.6 × 1.6 | Off | 3 |
| Sequence name | Slice gap (mm) | Bandwidth (Hz/Px) | Acquisition time (min) | Number of stations | Number of slices | Phase-encoding direction | Flip angle | IPAT | Ref. Lines | Respiratory control |
|---|---|---|---|---|---|---|---|---|---|---|
| DWI (b-value 900) | 0 | 2540 | 24 | 6 | 35 | A » P | 90–180° | 2 | 42 | Free breathing |
| DWI ishim | 0 | 1776 | 3.5 | 1 | 35 | A » P | 90–180° | 2 | 32 | Free breathing |
| T1 VIBE Dixon pre-contrast | 0 | 470 | 3 | 6 | 72 | A » P | 10° | 4 | 24 | Station 2–4: Breath-hold; Station 1 and 5–6: Free breathing |
| T1 TSE | 0.4 | 241 | 17 | 7 | 65 | F » H | Refocusing 153–160° | 2 | 30 | Free breathing |
| T2 HASTE | 0 | 539 | 9 | 6 | 35 | A » P | 180° | 2 | 30 | Breath-hold |
| TIRM | 0.4 | 233 | 12.5 | 7 | 65 | F » H | Refocusing 136–140° | 3 | 27 | Free breathing |
| FLAIR | 0.4 | 131 | 3.5 | 1 | 40 | R » L | Refocusing 150° | 2 | 54 | Free breathing |
| T1 VIBE Dixon post-contrast | 0 | 470 | 5 | 10–11, depending on patient size | 72 | A » P | 10° | 4 | 24 | Station 2–4: Breath hold; Station 1 and 5–10/11: Free breathing |
T1 VIBE Dixon, if not otherwise specified, refers to four acquired sets of images: in-phase, opposed-phase, water-only, and fat-only images. In-plane resolution refers to the final image resolution, including interpolation, if turned on
TE echo time, TR repetition time, FOV field of view, DWI diffusion-weighted imaging, MPR multiplanar reformation, VIBE volumetric interpolated breath-hold, TSE turbo spin-echo, HASTE half Fourier-acquisition single-shot turbo spin echo, TIRM turbo inversion recovery magnitude, FLAIR fluid-attenuated inversion recovery, IPAT integrated parallel acquisition techniques, A anterior, P posterior, F foot, H head, Ref. Lines reference lines