Positron-Emission TomographyTomography, Emission-ComputedTomography, X-Ray ComputedFluorodeoxyglucose F18RadiopharmaceuticalsFluorine RadioisotopesMultimodal ImagingCarbon RadioisotopesTomographyOxygen RadioisotopesTomography, Emission-Computed, Single-PhotonBrainTomography, Optical CoherenceMagnetic Resonance ImagingNitrogen RadioisotopesSensitivity and SpecificityRacloprideCerebrovascular CirculationCopper RadioisotopesTomography, Spiral ComputedRadioactive TracersDeoxyglucoseImage Processing, Computer-AssistedTomography, OpticalMultidetector Computed TomographyDiagnostic ImagingGamma RaysReproducibility of ResultsRadiographyPredictive Value of TestsGallium RadioisotopesRadioisotopesCone-Beam Computed TomographyTissue DistributionElectron Microscope TomographyDihydroxyphenylalanineOtoacoustic Emissions, SpontaneousWhole Body ImagingProspective StudiesTime FactorsAniline CompoundsCoronary CirculationLung NeoplasmsRetrospective StudiesRubidium RadioisotopesMisonidazoleReceptors, Dopamine D2Neoplasm StagingBrain MappingPhantoms, ImagingTomography, X-RayGlucoseRadiation DosageTomography Scanners, X-Ray ComputedImaging, Three-DimensionalSalicylamidesElectron Probe MicroanalysisFlumazenilMolecular ImagingTreatment OutcomePapioRadiochemistryVehicle EmissionsIsotope LabelingPapio anubisTetrabenazineFollow-Up StudiesPneumoconiosisPrognosisHeartElasmobranchiiCorpus StriatumSkates (Fish)Solitary Pulmonary NoduleAlgorithmsDideoxynucleosidesRegional Blood FlowLymphatic MetastasisMyocardial Perfusion ImagingIncidental FindingsReceptors, Dopamine D3DipyridamoleHeterocyclic Compounds, 1-RingSpectrometry, X-Ray EmissionNortropanesContrast MediaReference ValuesDopamine AntagonistsCerebral CortexImage EnhancementObserver VariationDopamineAmmoniaFluorineAlzheimer DiseaseRadiometrySpiperoneIodine RadioisotopesPutamenArtifacts