TABLE 1.
Magnetic resonance imaging parameters for the gel phantom measurements.
| Sequence (position in QA protocol) | Localizer (1) | T1 (2) | Bold sensitive EPI (3, 6) | Diffusion sensitive EPI (4) | Bold sensitive EPI (5) |
| Repetition time (TR) | 8.6 ms | 1900 ms | 2000 ms | 3900 ms | 177 ms |
| Echo time (TE) | 4 ms | 2.26 ms | 30 ms | 90 ms | 30 ms |
| Field of view (FoV) | 250 mm | 256 mm | 210 mm | 256 mm | 210 mm |
| Matrix size | 256 × 256 | 256 × 256 | 64 × 64 | 128 × 128 | 64 × 64 |
| Slice thickness | 7.0 mm | 1.0 mm | 3.0 mm | 2.0 mm | 3.0 mm |
| Distance factor | 50% | 20% | 0% | 20% | |
| Flip angle | 20° | 9° | 70° | 70° | |
| Phase encoding direction | Anterior >> posterior, anterior >> posterior, right >> left | Anterior >> posterior | Anterior >> posterior | Anterior >> posterior | Anterior >> posterior |
| Bandwidth (Hz/Px) | 320 | 200 | 2894 | 1502 | 2894 |
| Acquisition order (series) | Sequential (interleaved) | Single shot (ascending) | Interleaved (interleaved) | Interleaved (interleaved) | Interleaved (interleaved) |
| Number of slices | Two in each direction | 176 | 34 | 30 | 3 |
| Measurements | 1 | 1 | 200 | 322 | |
| Effective voxel size (mm) | 1.0 × 1.0 × 7.0 | 1.0 × 1.0 × 1.0 | 3.3 × 3.3 × 3.0 | 2.0 × 2.0 × 2.0 | 3.3 × 3.3 × 3.0 |
| Acquisition time (TA) | 0.25 | 4:26 | 6:44 | 2:14 | 1:00 |