Table 1 Image specifications.
From: Dimensions and forms of artefacts in 1.5 T and 3 T MRI caused by cochlear implants
T2-TSE | T2-TIRM | 3D-MPRAGE | DTI | |
|---|---|---|---|---|
TR (MS) | 5800 | 8000 | 7.8 | 7000 |
TE (MS) | 95 | 87 | 2.94 | 95 |
TI (MS) | – | 2370 | 1100 | – |
Flip angle | 90°/150° | 90°/150° | 8° | 90 |
Echo train length | 16 | 16 | 1 | 64 |
Pixel bandwidth (Hz/Px) | 220 | 250 | 250 | 1500 |
Acquisition matrix | 218 × 384 | 175 × 320 | 187 × 256 | 64 × 128 |
Reconstructed matrix | 312 × 384 | 250 × 320 | 208 × 256 | 256 × 256 |
Field of view (mm) | 178 × 220 | 171 × 220 | 178 × 220 | 220 × 220 |
Slice thickness (mm) | 2 | 3 | 1 | 3 |
Gap between slices (mm) | 0 | 0.6 | 0 | 0,3 |
Number of slices | 75 | 45 | 176 | 43 |
Number of concatinations | 3 | 2 | 1 | 1 |
Parallel imaging mode | GRAPPA | – | GRAPPA | GRAPPA |
Parallel imaging factor | 2 | – | 2 | 2 |
Number of diffusion encoding directions | – | – | – | 20 |
B-value | – | – | – | 1000 |
Voxel size (mm) | 0.573 × 0.573 × 2 | 0.688 × 0.688 × 3 | 0.859 × 0.859 × 1 | 0.859 × 0.859 × 3 |
Acquisition time | 3 × 54.40 s | 2 × 1 min 20 s | 3 min 36 s | 2 min 50 s |
