Scan parameters for axial 2D FLAIR,a coronal CE-T1WI, and axial CE-T1WI used in the study
| FLAIRa,b | Coronal CE-T1WIb | Axial CE-T1WIb | |
|---|---|---|---|
| Section thickness (mm) | 5 | 5 | 5 |
| TR (ms) | 8000–11,000 | 300–742 | 276–780 |
| TE (ms) | 82–142 | 9–17 | 8.4–20 |
| TI (ms) | 2000–2500 | – | – |
| FOV (mm) | 172–230 × 210–230 | 172–230 × 172–230 | 172–230 × 210–230 |
| Matrix | 224–512 × 256–512 | 224–512 × 256–512 | 224–384 × 256–512 |
| Subset of scans obtained with fat saturation | 19 (63.3%) | 17 (73.9%) | 6 (20%) |
Note:— – indicates N/A.
↵a In 3 patients, FLAIR images had been acquired using a 3D sequence with a 1-mm section thickness of images reconstructed in the coronal plane (TR = 5000 ms, TE = 395 ms, TI = 1800 ms, FOV = 256 × 256 mm, matrix = 256 × 256).
↵b For patients with optic neuritis, 19/30 (63.3%), 17/23 (73.9%), and 6/30 (20%) FLAIR, coronal CE-T1WI, and axial CE-T1WIs were performed using fat saturation.