Table 1. MRI protocol acquisition parameters.
| MRI Scan | 3D T1-w image | T2-w image (fat sat) | T2-w image (no fat sat) | Diffusion-weighted | B1 Map | Multi Flip Angle Spoiled GRE (T1 Mapping) | Magnetization Transfer | 3D Quantitative DIXON | |
|---|---|---|---|---|---|---|---|---|---|
| Orientation | Axial | Axial | Axial | Axial | Axial | Axial | Axial | Axial | |
| Acquisition Matrix | 256 x 208 | 256 x 208 | 256 x 208 | 128 x 104 | 128 x 104 | 128 x 104 | 128 x 104 | 160 x 132 | |
| Field of View [mm] | 384 x 312 | 384 x 312 | 384 x 312 | 384 x 312 | 384 x 312 | 384 x 312 | 384 x 312 | 450 x 372 | |
| In Plane Resolution [mm] | 1.5 x 1.5 | 1.5 x 1.5 | 1.5 x 1.5 | 3 x 3 | 3 x 3 | 3 x 3 | 3 x 3 | 1.4 x 1.4 | |
| Number of Slices | 48 | 48 | 48 | 40 | 24 | 48 | 48 | 64 | |
| Slice Thickness/Slice Gap [mm] | 4/0 | 4/0 | 4/0 | 4/0.8 | 8/0 | 4/0 | 4/0 | 4/0 | |
| TR [ms] | 4.04 | 750 | 386 | 7600 | 14310 | 4.6 | 2000 | 9 | |
| TE [ms] | 1.29; 2.52 | 105 | 105 | 48 | 2.06 | 1.96 | 3.58 | 1.05; 2.46; 3.69; 4.92; 6.15; 7.38 | |
| Flip Angle [degrees] | 10 | 100 | 100 | 90 | 8 | 20; 16; 12; 8; 4 | 25 | 4 | |
| Fat Suppression | 2 point Dixon | SPAIR | None | SPAIR | None | None | None | 6 point Dixon | |
| Miscellaneous | b-values: 0, 50, 200, 800 | 5 flip angles | ’MTC’ off & ’MTC’ on | ||||||
| Motion Compensation | 1 breath-hold | 2 breath-holds | 1 breath-hold | Respiratory Gated | 2 breath-holds | 1 breath-hold | None | 1 breath-hold | |
| Acquisition Time [m:s] | 0:12 | 0:39 | 0:19 | 4:08 | 0:29 | 0:10 each; 5 acquisitions | 2:12 each; 2 acquisitions | 0:13 | |