Table 2.
MRI parameters
| Parameters | navT2*w GRE | Navigator | Traditional T2*w GRE | MP2RAGE |
|---|---|---|---|---|
| Voxel size (mm3) | 0.53 | 6×5.625×2.5 | 0.53 | 0.53 |
| FOV (mm3) | 240×180×32 | 240×180×30 | 240×168×30 | 224×168×112 |
| Slice oversampling (%) | 25 | 33 | 0 | 7.1 |
| Spatial encoding | 3D | 3D | 2D | 3D |
| Acquisition plane | Axial | Axial | Axial | Axial |
| TE (ms) | 18, 29.48, 40.96, 52.44 | 4.31, 8.95 | 11.4, 22.5, 33.6, 44.7, 55.8 | 3.02 |
| TI (ms) | N/A | N/A | N/A | 800/2700 |
| TR (ms) | 74 | 74 | 4095 | 6000 |
| Flip angle (°) | 10 | 10 | 70 | 4/5 |
| Pixel bandwidth (Hz) | 104 | 1250 | 104 | 237 |
| Parallel imaging | 3×1 | 4×2 | 2 | 3 |
| Scan time (min:sec) | 11:50 | 0.6 sec | 11:26 | 10:32 |
| No. of repetitions | 1 | N/A | 1 | 4 |
Note: navT2*w GRE=navigator-guided T2*-weighted gradient recalled echo sequence, MP2RAGE= Magnetization Prepared 2 Rapid Acquisition Gradient Echoes