Table 2.
MRI characteristics of non-contrast-enhancing lesions.
| SWI lesions | Lesions associated with veins on SWI | T1 hypointense lesions | |
|---|---|---|---|
| Homogenous hypointense lesions | 374 | 172 (46%) |
307 (82%) |
| Ring-shaped distribution of susceptibility dots | 162 | 82 (51%) |
138 (85%) |
| Scattered distribution of susceptibility dots | 199 | 86 (43%) |
145 (73%) |
| Lesions with a central dark region in SWI | 75 | 26 (35%) |
46 (61%) |
| Lesions not visible in SWI | 436 | – | 279 (64%) |
| Total | 1,246 | 366 (29%) | 915 (73%) |
SWI, susceptibility-weighted magnetic resonance imaging.