Clarify the presence of an abnormality, identified on non-invasive imaging | 23 | 46% |
Surveillance of a known untreated cerebrovascular abnormality | 1 | 2% |
Follow-up of a previously treated cerebrovascular lesion | 14 | 28% |
Evaluate extracranial carotid or vertebral artery disease | 3 | 6% |
Rule out underlying cause of intracranial hemorrhage | 6 | 12% |
Rule out blunt cerebrovascular injury | 2 | 4% |
Rule out cerebral vasculopathy | 1 | 2% |
Rule out unruptured mycotic aneurysm | 3 | 6% |