Table 1.
MRI acquisition parameters for each scanner used in the in-house database.
| Avanto | Avanto Fit | Symphony | Symphony Tim | Tim Trioa | |
|---|---|---|---|---|---|
| Field Strength (T) | 1.5 | 1.5 | 1.5 | 1.5 | 3.0 |
| MPRAGE | |||||
| TR (ms) | 1980 | 2300 | 2700 | 1980 | 2300 |
| TE (ms) | 3.1 | 3.05 | 4.8 | 3.08 | 2.98 |
| TI (ms) | 1100 | 900 | 850 | 1100 | 900 |
| Voxel size (mm) | 1x1x1 | 1x1x1 | 1x1x1.2 | 1x1x1 | 1x1x1 |
| Plane | Sagittal | Sagittal | Sagittal | Sagittal | Sagittal |
| T2-FLAIR | |||||
| TR (ms) | 8500 | 8500 | 9000 | 8500 | 9000//2300 |
| TE (ms) | 92 | 99 | 114 | 95 | 87//392 |
| TI (ms) | 2439 | 2440 | 2500 | 2440 | 2500//1800 |
| Voxel size (mm) | 0.97x0.97x3 | 0.97x0.97x3 | 0.49x0.49x3 | 0.97x0.97x3 | 0.49x0.49x3//1x1x1 |
| Plane | Axial | Axial | Axial | Axial | Axial//Sagittal |
| In dataset, n (%) | 64 (17) | 64 (17) | 10 (3) | 51 (13) | 193 (50) |
TR: repetition time, TE: echo time, TI: inversion time.
a
With Tim Trio there are T2-FLAIR scans acquired with 2D and 3D. In table are specified by 2D parameters//3D parameters. The 3D T2-FLAIR acquisition parameters are the same used in the external validation dataset.