Intracranial AneurysmBasilar ArteryEmbolization, TherapeuticAneurysm, RupturedCerebral AngiographyPosterior Cerebral ArterySubarachnoid HemorrhageAneurysmAneurysm, InfectedCerebral ArteriesAortic AneurysmAortic Aneurysm, ThoracicHeart AneurysmAneurysm, DissectingAngiography, Digital SubtractionSurgical InstrumentsTreatment OutcomeTomography, X-Ray ComputedArteriesIliac AneurysmVertebrobasilar InsufficiencyVertebral ArteryEndovascular ProceduresCoronary AneurysmNeckBlood Vessel Prosthesis ImplantationAneurysm, FalseBlood Vessel ProsthesisCerebrovascular CirculationCarotid Artery, InternalAortic RuptureHead and Neck NeoplasmsVascular Surgical ProceduresPlatinumNeurosurgical ProceduresMiddle Cerebral ArteryCerebral InfarctionAnterior Cerebral ArteryStentsCircle of WillisAorta, AbdominalVasospasm, IntracranialAngiographyAortographyCarotid ArteriesMagnetic Resonance AngiographyCarotid Artery DiseasesMicrosurgeryCraniotomyRenal ArteryFollow-Up StudiesRetrospective StudiesPostoperative ComplicationsIliac ArteryImaging, Three-DimensionalPulmonary ArteryFemoral ArteryCerebral HemorrhageRetreatmentTime FactorsGlasgow Outcome ScaleModels, CardiovascularIntracranial ThrombosisBrain Stem InfarctionsCarotid Artery, CommonMagnetic Resonance ImagingEquipment DesignBrainNeck PainSplenic ArteryBalloon OcclusionBrain IschemiaCerebral VeinsRupture, SpontaneousCerebral RevascularizationOphthalmic ArteryArterial Occlusive DiseasesCerebral PalsyRecurrenceSubclavian ArteryMesenteric ArteriesLigationCoated Materials, BiocompatibleMuscle, Smooth, VascularInfarction, Middle Cerebral ArteryFatal OutcomeDisease Models, AnimalBlood Flow VelocityCeliac ArteryProsthesis DesignRisk FactorsVasoconstrictionMesenteric Artery, SuperiorIntracranial Arteriovenous MalformationsDilatation, PathologicVasodilationIschemic Attack, TransientIntracranial Embolism and ThrombosisProspective StudiesDogs