Table 2.
Parameters of diffusion tensor imaging and T2-weighted sequences
| Diffusion tensor imaging | T2-weighted sequences | |||
|---|---|---|---|---|
| Scanner | Prismafit | TimTrio | Prismafit | TimTrio |
| Repetition time (ms) | 4,000 | 4,000 | 6,969 | 8,150 |
| Echo time (ms) | 87 | 92.8 | 54 | 54 |
| Field of view | 160 × 160 mm2 | 160 × 160 mm2 | 140 × 140 mm2 | 160 × 160 mm2 |
| Matrix | 128 × 128 | 128 × 128 | 512 × 358 | 512 × 333 |
| Slice thickness (mm) | 4.0 | 4.0 | 3.5 | 3.5 |
| Number of slices | 18 | 18 | 35 | 41 |
| Slice gap (mm) | 0.4 | 1.2 | 0.35 | 0.35 |
| Number of averages | 3 | 3 | 3 | 2 |
| Parallel imaging | GRAPPA | GRAPPA | GRAPPA | GRAPPA |
| Acceleration factor | 2 | 3 | 2 | 2 |
| Acquisition time (min:s) | 4:34 | 4:32 | 04:22 | 5:29 |
| Fat saturation | SPAIR | SPAIR | Spectral | Spectral |
| b value | 0, 1,000 s/mm2 | 0, 1,000 s/mm2 | − | − |
| Diffusion gradients | 20 | 20 | − | − |
GRAPPA Generalized autocalibrating partial parallel acquisition, SPAIR Spectral adiabatic inversion recovery