Moyamoya DiseaseCerebral RevascularizationCerebral AngiographyMeningeal ArteriesTemporal ArteriesCerebral ArteriesMagnetic Resonance AngiographyMeningesCarotid Artery, InternalCerebral HemorrhageCerebrovascular CirculationTomography, Emission-Computed, Single-PhotonMiddle Cerebral ArteryCircle of WillisPosterior Cerebral ArteryPhotophobiaArterial Occlusive DiseasesCollateral CirculationAnastomosis, SurgicalIschemic Attack, TransientCerebral InfarctionIntracranial HemorrhagesAngiography, Digital SubtractionNeurosurgical ProceduresCarotid Artery, External