AstrocytomaRadionuclide ImagingRadionuclide AngiographyRadioisotopesRadionuclide VentriculographyBrain NeoplasmsTechnetiumRadionuclide GeneratorsCesium RadioisotopesWater Pollutants, RadioactiveSodium Pertechnetate Tc 99mHypothalamic NeoplasmsStrontium RadioisotopesGated Blood-Pool ImagingGlioblastomaSoil Pollutants, RadioactiveRadiometryRadioactivityGliomaRheniumOptic Nerve NeoplasmsRadiopharmaceuticalsAlpha ParticlesVentriculography, First-PassPlutoniumPentetic AcidSupratentorial NeoplasmsRadioimmunotherapyFood Contamination, RadioactiveOligodendrogliomaIndium RadioisotopesRadiation DosageIodine RadioisotopesYttrium RadioisotopesSpinal Cord NeoplasmsBeta ParticlesRadiation MonitoringGold RadioisotopesGallium RadioisotopesHolmiumAstatineSpectrometry, GammaRadioactive FalloutRadioactive PollutantsStroke VolumeRadioactive WastePoloniumLutetiumTomography, Emission-Computed, Single-PhotonAstrocytesActiniumTechnetium Tc 99m Aggregated AlbuminTumor Cells, CulturedTechnetium Tc 99m MedronateThoriumAnaplasiaCerebellar NeoplasmsTechnetium Tc 99m Sulfur ColloidTechnetium CompoundsOrganometallic CompoundsEpendymomaPotassium RadioisotopesCentral Nervous System NeoplasmsRadiobiologyCopper RadioisotopesCineangiographyHeterocyclic Compounds, 1-RingNimustineRadioactive Hazard ReleaseOctreotideBrain Stem NeoplasmsTin CompoundsRadioisotope RenographyIndiumHeartSamariumAngiocardiographyRadiotherapy DosageGamma CamerasMagnetic Resonance ImagingGlial Fibrillary Acidic ProteinTechnetium Tc 99m PentetateTomography, X-Ray ComputedAmericiumGenes, ModifierOrganotechnetium CompoundsNuclear MedicineThalliumIsotope LabelingFukushima Nuclear AccidentCell Line, TumorRadiumNuclear ReactorsDose-Response Relationship, RadiationBody BurdenTissue DistributionOptic ChiasmGangliogliomaNeuroendocrine TumorsDacarbazine