Cerebral VeinsIntracranial ThrombosisCranial SinusesSinus Thrombosis, IntracranialVeinsMeningeal ArteriesCerebral ArteriesCerebral AngiographyDura MaterCerebrovascular CirculationClot RetractionSagittal Sinus ThrombosisSuperior Sagittal SinusCentral Nervous System Vascular MalformationsSphenoid SinusSaphenous VeinCavernous SinusIntracranial Embolism and ThrombosisVenous ThrombosisCerebral InfarctionPortal VeinVaricose VeinsCerebral PalsyUltrasonography, Doppler, ColorFemoral VeinUltrasonography, Doppler, TranscranialMiddle Cerebral ArteryTomography, X-Ray ComputedIntracranial AneurysmJugular VeinsPulmonary VeinsFibrinMagnetic Resonance ImagingInfarction, Middle Cerebral ArteryImage Processing, Computer-AssistedBrainMalaria, CerebralBlood CoagulationBrain IschemiaIliac VeinMesenteric VeinsCerebral HemorrhageRenal VeinsUmbilical VeinsPopliteal VeinFibrinolysisHepatic Veins