Table 2.
MRI acquisition parameters.
| 3D T1w (MPRAGE) | 3D FLAIR | Multiparameter mapping | ||||
|---|---|---|---|---|---|---|
| T1w | PDw | MTw | B1 map | |||
| Reconstruction voxel size | 0.75×0.75×0.75 mm3 | 0.75×0.75×0.75 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 2.5 mm3 |
| Acquisition voxel size | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 1 × 1 × 1 mm3 | 3.5 × 3.5 × 5 mm3 |
| TR | 9 ms | 4800 ms | 18 ms | 18 ms | 48 ms | 30/150 ms |
| TE | 4 ms | shortest | 6 echoes first: 2.4 ms echo spacing: 2.4 ms |
6 echoes first: 2.4 ms echo spacing: 2.4 ms |
6 echoes first: 2.4 ms echo spacing: 2.4 ms |
shortest |
| TI | 1000ms | 1650 ms | / | / | / | / |
| Flip angle | 8° | 90° | 25° | 4° | 6° | 60° |
| Acquisition mode | turbo field echo | turbo spin echo | fast field echo | fast field echo | fast field echo | fast field echo |
Abbreviations: FLAIR: fluid-attenuated inversion recovery, MPRAGE: magnetization-prepared rapid gradient echo, MTw: magnetization transfer-weighted, PDw: proton density-weighted, T1w: T1-weighted, TE: echo time, TI: inversion time, TR: repetition time.