Typical optimized whole-brain DTI acquisition parameters in a 1.5T or 3T MR imaging system*
| Acquisition Parameters | 3T | 1.5T |
|---|---|---|
| Spatial resolution | 2.0 × 2.0 × 2.0 mm | 2.5 × 2.5 × 2.5 mm |
| Acquisition matrix | 128 × 128 × 60 | 96 × 96 × 50 |
| FOV | 256 mm | 240 mm |
| No. DWIs | 30 | 30 |
| No. minimally weighted images | 5 | 5 |
| No. repetitions (NEX) | 1 | 1 |
| b-value | 1000 s/mm2 | 1000 s/mm2 |
| TE/TR | 70 ms/<12 seconds | 70 ms/<10 seconds |
| Total acquisition time | <8 minutes | <7 minutes |
* The hardware is assumed to be equipped with an 8-channel head coil and gradients of 40 mT/m. It is also assumed that parallel acquisition is done with a SENSE reduction factor of 2, partial k-space acquisition of 62.5% (only 5/8 of the phase-encoding lines after a reduction to half by parallel acquisition is acquired), and an interleaved multisection SS-EPI sequence with no gap.