title: Possible future refinements.
mesh_terms: D002545:Brain Ischemia / Q000209:etiology; D002340:Carotid Artery Diseases / Q000175:diagnosis* / Q000503:physiopathology; D002533:Cerebral Angiography; D003251:Constriction, Pathologic / Q000175:diagnosis; D006439:Hemodynamics; D006801:Humans; D002537:Intracranial Arteriosclerosis / Q000175:diagnosis* / Q000503:physiopathology; D009682:Magnetic Resonance Spectroscopy; D011300:Preoperative Care; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography