XenonXenon RadioisotopesRadioisotopesTomography, Emission-Computed, Single-PhotonZinc RadioisotopesIodine RadioisotopesRadioisotope Dilution TechniqueRadiopharmaceuticalsOrganotechnetium CompoundsStrontium RadioisotopesKrypton RadioisotopesIndium RadioisotopesTechnetium Tc 99m ExametazimeTechnetiumAnesthetics, InhalationOximesSodium RadioisotopesRadionuclide ImagingYttrium RadioisotopesRadioactivityBarium RadioisotopesTechnetium Tc 99m SestamibiTin RadioisotopesCarbon RadioisotopesIron RadioisotopesPhosphorus RadioisotopesCopper RadioisotopesThallium RadioisotopesTechnetium Tc 99m Sulfur ColloidBeta ParticlesMercury RadioisotopesIsotope LabelingCesium IsotopesCerebrovascular CirculationCerium RadioisotopesCobalt IsotopesHafniumLead RadioisotopesSodium Pertechnetate Tc 99mGold RadioisotopesTomography, Emission-ComputedRadioimmunotherapyNitrous OxideDiagnostic Techniques, RadioisotopeSensitivity and SpecificityZinc IsotopesGated Blood-Pool ImagingSulfur RadioisotopesLutetiumArgonCadmium RadioisotopesIofetamineAstatineTechnetium Tc 99m MedronateRheniumScintillation CountingTomography, X-Ray ComputedTropanesSamariumGamma CamerasTissue DistributionPositron-Emission TomographySoil Pollutants, RadioactiveTechnetium Tc 99m PentetateNuclear MedicineHeterocyclic Compounds, 1-RingBromine RadioisotopesPhantoms, ImagingPentetic AcidSubdural EffusionImage Processing, Computer-AssistedBrainCalcium IsotopesRadioactive WasteSerum Albumin, Radio-IodinatedCardiac-Gated Single-Photon Emission Computer-Assisted TomographyRadiometryReproducibility of ResultsRuthenium RadioisotopesRadiometric Dating