Assignment of lesions to a vascular territory on MRA
| Arterial Territory | Lesions* |
|---|---|
| ICA | 14 (18%) |
| ACA | 15 (20%) |
| MCA | 39 (51%) |
| PCA | 6 (10.5%) |
| Vertebrobasilar | 0 |
| Anterior choroidal | 0 |
Note:—ICA indicates internal carotid artery; ACA, anterior cerebral artery; MCA, middle cerebral artery; PCA, posterior cerebral artery.
* MR angiography detected 76 lesions, including 2 aneurysms.