PerfusionRadionuclide ImagingRadionuclide AngiographyRadioisotopesRadionuclide VentriculographyPerfusion ImagingTechnetiumRadionuclide GeneratorsCesium RadioisotopesMyocardial Perfusion ImagingWater Pollutants, RadioactiveSodium Pertechnetate Tc 99mGated Blood-Pool ImagingStrontium RadioisotopesTomography, Emission-Computed, Single-PhotonRadiopharmaceuticalsSoil Pollutants, RadioactiveRadiometryRadioactivityVentriculography, First-PassRheniumAlpha ParticlesPentetic AcidPlutoniumIodine RadioisotopesRadiation DosageRadioimmunotherapyIndium RadioisotopesFood Contamination, RadioactiveOrganotechnetium CompoundsHeartYttrium RadioisotopesTechnetium Tc 99m SestamibiTechnetium Tc 99m Aggregated AlbuminBeta ParticlesCoronary CirculationRadiation MonitoringStroke VolumeGold RadioisotopesGallium RadioisotopesHolmiumChemotherapy, Cancer, Regional PerfusionAstatineSpectrometry, GammaRadioactive FalloutRadioactive PollutantsRadioactive WastePoloniumLutetiumActiniumOrganometallic CompoundsThallium RadioisotopesThalliumCerebrovascular CirculationTechnetium Tc 99m MedronateRegional Blood FlowThoriumPotassium RadioisotopesCopper RadioisotopesContrast MediaTechnetium Tc 99m Sulfur ColloidCineangiographyGamma CamerasTechnetium CompoundsTechnetium Tc 99m PentetateRadioisotope RenographyIndiumTin CompoundsPositron-Emission TomographyRadiobiologyExercise TestVentricular Function, LeftHeterocyclic Compounds, 1-RingRadioactive Hazard ReleaseOctreotideTomography, X-Ray ComputedAngiocardiographyTime FactorsSamariumNuclear MedicineTomography, Emission-ComputedVentilation-Perfusion RatioCoronary DiseaseTissue DistributionIsotope LabelingSensitivity and SpecificityHeart VentriclesAmericiumDipyridamoleImage Processing, Computer-AssistedFukushima Nuclear Accident3-IodobenzylguanidineReproducibility of ResultsRadiotherapy DosageDose-Response Relationship, RadiationRadiumHemodynamicsNuclear ReactorsBody BurdenCardiac Volume