Imaging and sequence timing parameters for non-MP and MP 3D-FLAIR
| Parameter | Non-MP 3D FLAIR | MP 3D FLAIR |
|---|---|---|
| FOV (mm) | 224 | 250 |
| TR (ms) | 8000 | 4800 |
| TE (ms) | 340 | 299 |
| TE, effective (ms) | 154 | 128 |
| Acquisition voxel size (RO/PE/SS) (mm) | 1.0/1.0/1.0 | 0.98/0.99/1.0 |
| Matrix (RO/PE) | 224 × 223 | 256 × 253 |
| Sensitivity encoding factor (PE/SS) | 2.5/2.0 | 2.6/2.0 |
| Acquisition time | 7 min 44 sec | 6 min 10 sec |
| No. of sections | 350 | 360 |
| TSE factor | 110 | 182 |
| NSA | 1 | 2 |
| Echo-train length (ms) (τ5) | 626 | 572 |
| Inversion time (ms) (τ1) | 2400 | 1650 |
| T2 preparation (ms) (τ2) | N/A | 125 |
| Spoiler duration (ms) (τ3) | N/A | 17.23 |
| Sequence dead timea (ms) (τ4) | 4974 | 2435.77 |
Note:—RO indicates readout; PE, phase-encoding; SS, section-selection; NSA, number of signals averaged.
↵a Duration between the end of the echo-train and TR.