Tomography, Emission-Computed, Single-PhotonOrganotechnetium CompoundsTechnetium Tc 99m ExametazimeRadiopharmaceuticalsOximesTechnetium Tc 99m SestamibiThallium RadioisotopesIodine RadioisotopesGated Blood-Pool ImagingIofetamineTropanesGamma CamerasTechnetiumPhantoms, ImagingImage Processing, Computer-AssistedCardiac-Gated Single-Photon Emission Computer-Assisted TomographyTomography, Emission-ComputedSensitivity and SpecificityIodobenzenesMyocardial Perfusion ImagingCerebrovascular CirculationOrganophosphorus CompoundsThalliumBrainAmphetaminesTechnetium Tc 99m MedronateHeartTomography, X-Ray ComputedSubtraction TechniqueReproducibility of ResultsImage EnhancementImage Interpretation, Computer-AssistedArtifactsTechnetium Tc 99m Aggregated AlbuminSodium Pertechnetate Tc 99mNortropanesModels, StructuralXenon RadioisotopesAcetazolamideExercise TestDopamine Plasma Membrane Transport ProteinsMagnetic Resonance ImagingFlumazenilDipyridamolePositron-Emission TomographyIndium RadioisotopesMultimodal ImagingWhole Body ImagingCinanserinTechnetium Tc 99m Dimercaptosuccinic AcidFluorine RadioisotopesGallium RadioisotopesPerfusion ImagingAlgorithmsCoronary Circulation3-IodobenzylguanidineMethyltyrosinesCysteineFluorodeoxyglucose F18Technology, RadiologicCoronary DiseaseVentricular Dysfunction, LeftMyocardial IschemiaRadionuclide AngiographyScattering, RadiationTechnetium Tc 99m PentetatePredictive Value of TestsFeasibility StudiesTissue DistributionRadioisotopesSuccimerImaging, Three-DimensionalROC CurveRadioactive TracersNuclear MedicineEpilepsies, PartialCoronary Artery DiseasePyrrolidinesYttrium RadioisotopesLisurideDobutamineRadionuclide ImagingVentricular Function, LeftCoronary AngiographyPhotonsTechnetium Tc 99m Sulfur ColloidTelluriumOrganometallic CompoundsTime FactorsMyocardial StunningRadiometryMyocardial InfarctionTechnetium Tc 99m PyrophosphateStroke VolumeCerebrovascular DisordersElectrocardiographyFalse Positive ReactionsReceptors, Dopamine D2AdosterolHead Injuries, Closed