Cerebral ArteriesCerebral InfarctionCerebral PalsyCerebrovascular CirculationMiddle Cerebral ArteryBrainCerebral AngiographyInfarction, Middle Cerebral ArteryMalaria, CerebralCerebral VeinsBrain IschemiaMagnetic Resonance ImagingEcho-Planar ImagingCerebral HemorrhageEcholocationIschemic Attack, TransientImage EnhancementAnterior Cerebral ArteryBlood Flow VelocityCerebral VentriclesCerebral Amyloid AngiopathyPosterior Cerebral ArteryBrain EdemaSubarachnoid HemorrhageCerebrovascular DisordersBrain DiseasesImage Interpretation, Computer-AssistedIntracranial Embolism and ThrombosisTime FactorsPhantoms, ImagingDominance, CerebralChiropteraIntracranial PressureReproducibility of ResultsIntracranial AneurysmCerebral RevascularizationMagnetic Resonance AngiographyCerebrumVasospasm, IntracranialContrast MediaArtifactsTomography, X-Ray ComputedSensitivity and SpecificityOxygenHypoxia, BrainUltrasonographyNeuroprotective AgentsDisease Models, AnimalImaging, Three-DimensionalStrokeRats, Sprague-DawleyXenon RadioisotopesCarbon DioxideBasilar ArteryRegional Blood FlowPia MaterBlood PressureBlood-Brain BarrierSpectroscopy, Near-InfraredBlood VolumeReperfusionTomography, Emission-ComputedNeuronsMagnetic Resonance SpectroscopyEchocardiographyAlgorithmsArterial Occlusive DiseasesIntracranial ThrombosisBrain InfarctionTechnetium Tc 99m ExametazimeIntracranial Arteriovenous MalformationsTomography, Emission-Computed, Single-PhotonAcetazolamideEchocardiography, TransesophagealRats, WistarProspective StudiesBrain ChemistryElectroencephalographyCircle of WillisSpin LabelsMicrocirculationToxoplasmosis, CerebralBrain InjuriesHemodynamicsDoppler EffectXenonTreatment OutcomeBrain MappingOximesOxygen ConsumptionReference ValuesHypercapniaNeurologic ExaminationReperfusion InjuryGadolinium DTPAIofetamineAneurysm, RupturedCarotid StenosisSinus Thrombosis, IntracranialUltrasonics