Distribution of SWI signal characteristics in new MS lesions
| SWI Signal | No. (%) | Gd+ | Gd− |
|---|---|---|---|
| Hypointense rings | 52 (30.8%) | 4 (7.7%) | 48 (92.3%) |
| Marked hypointensity | 88 (52.1%) | 3 (3.4%) | 85 (96.6%) |
| Mild hypointensity | 11 (6.5%) | 10 (90.9%) | 1 (9.1%) |
| Iso/hyperintensity | 18 (10.7%) | 18 (100.0%) | 0 (0.0%) |
| Indeterminate | 14 (8.3%) | 6 (42.9%) | 8 (57.1%) |
Note:—Gd+ indicates gadolinium-enhancing lesions; Gd–, gadolinium-nonenhancing lesions.