MRI acquisitions in Exercises A and B.
| Center/MRI unit | Sequence | Plane | FS | Gd | TR (ms) | TE (mm) | ST (mm) | TI (ms) | Gap (mm) | FOV (mm) | Matrix | Time (min) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Exercise A | ||||||||||||
| Leeds | T1 SE | Cor | − | − | 485 | 20 | 1.5 | − | 0.1 | 100 × 50 | 256 × 256 | 4.10 |
| 1.5 T Philips | T2 TSE SPIR | Cor | + | − | 2000 | 100 | 2.0 | − | 0.2 | 100 × 100 | 198 × 256 | 3.44 |
| Gyroscan | T1 SE | Ax | − | +/− | 485 | 20 | 1.5 | − | 0.1 | 100 × 50 | 205 × 256 | 3.21 |
| T1 SPIR | Cor | + | + | 450 | 20 | 1.5 | − | 0.1 | 100 × 100 | 192 × 256 | 8.44 | |
| Copenhagen | T1 SE | Cor | − | +/− | 600 | 15 | 3.0 | − | 0.0 | 109 × 145 | 192 × 256 | 3.53 |
| 1.0 T Siemens | T1 SE | Ax | − | +/− | 600−700 | 15 | 3.0 | − | 0.0 | 109 × 145 | 192 × 256 | 3.53–4.32 |
| Impact | STIR | Cor | − | − | 4500 | 30 | 3.0 | 150 | 0.0 | 108 × 145 | 182 × 256 | 5.5 |
| Exercise B | ||||||||||||
| Copenhagen | 3D-GE | Cor/Ax | − | +/− | 30 | 18 | 1.0 | − | 0.0 | 140 × 140 | 256 × 256 | 6.5 |
| 0.2 T Esaote
Artoscan | STIR | Cor | − | − | 1100 | 24 | 3.0 | 85 | 0.3 | 140 × 140 | 192 × 160 | 5.5 |
FOV: field of view; FS: spectral fat saturation (+: yes; − no); Gd: IV injection of gadolinium contrast (−: sequence obtained before injection; +: sequence obtained after injection); GE: gradient echo; 3D-GE: T1-weighted 3-dimensional gradient echo sequence with subsequent multiplanar reconstruction. The flip angle was 65°. SPIR: spectral prepulse inversion recovery; ST: slice thickness; STIR: short-tau inversion recovery; T: tesla; T1-SE: T1-weighted spin-echo; TE: echo time; TI: inversion time; TR: repetition time.