Imaging parameters and examination times
| Sequence | Sagittal T1WI | Sagittal T2WI | Sagittal T2TIRM | Axial T2* GRE |
|---|---|---|---|---|
| TR (ms) | 600 | 3000 | 3000 | 1300 |
| TE (ms) | 10 | 109 | 32 | 14 |
| Flip angle | 160° | 180° | 140° | 30° |
| Section thickness (mm) | 3 | 3 | 3 | 3 |
| Gap (mm) | 3.3 | 3.3 | 3.3 | 3.3 |
| NEX | 3 | 2 | 1 | 1 |
| ETL | 53 | 31 | 7 | 1 |
| Matrix (reconstruction) | 384 × 306 | 320 × 320 | 640 × 640 | 512 × 512 |
| Matrix (acquisition) | 384 × 260 | 320 × 256 | 320 × 240 | 256 × 256 |
| FOV | 191 × 240 | 240 × 240 | 240 × 240 | 160 × 160 |
| Time (min/sec) | ||||
| Nonaccelerated (original) | 03:10 | 03:06 | 03:24 | 08:19 |
| 2 Averages (% reduction) | 02:06 (33.7%) | |||
| 1 average | 01:03 (67%) | 01:30 (54%) | ||
| Acc 2 | 01:36 (49.5%) | 01:31 (53.4%) | 01:48 (47%) | 04:24 (47%) |
| Acc 3 | 01:04 (66.4%) | 01:07 (66%) | 01:15 (63%) | 03:06 (63%) |
| Acc 4 | 01:00 (68.8%) | 00:55 (67.6%) | 00:57 (72%) | 02:27 (74.5%) |
Note:—ETL indicates echo-train length; Acc, acceleration factor.