The evaluation of the cerebral circulation by non-invasive methods.
D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000000981:diagnostic imaging; D002560:Cerebrovascular Circulation; D005069:Evaluation Studies as Topic; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000175:diagnosis; D008722:Methods; D011877:Radionuclide Imaging; D014463:Ultrasonography