ThalliumThallium RadioisotopesMass SpectrometryRadioisotopesIsotopesIsotope LabelingRanitidineOrganometallic CompoundsZinc RadioisotopesAntacidsAnti-Ulcer AgentsRadioisotope Dilution TechniqueCarbon IsotopesNitrogen IsotopesMetronidazoleOxygen IsotopesSalicylatesFerrocyanidesIodine RadioisotopesStrontium RadioisotopesAmoxicillinHelicobacter pyloriTomography, Emission-Computed, Single-PhotonHelicobacter InfectionsClarithromycinZinc IsotopesRadionuclide ImagingKrypton RadioisotopesHistamine H2 AntagonistsIndium RadioisotopesDipyridamoleFurazolidoneDimercaprolSodium RadioisotopesTinidazoleDuodenal UlcerExercise TestDrug Therapy, CombinationRadioactivityCarbon RadioisotopesTetracyclineBarium RadioisotopesHeartScintillation CountingCoronary DiseaseOmeprazoleYttrium RadioisotopesTin RadioisotopesGermaniumKlatskin's TumorIron RadioisotopesAnti-Bacterial AgentsAlpha ParticlesCopper RadioisotopesPhosphorus RadioisotopesTechnetiumSucralfateAntidotesBeta ParticlesRadiopharmaceuticalsPotassium RadioisotopesSulfur IsotopesCesium IsotopesTechnetium Tc 99m Sulfur ColloidDeuteriumMercury RadioisotopesCobalt IsotopesPeptic UlcerLead RadioisotopesAlopeciaCerium RadioisotopesHafniumIron IsotopesGold RadioisotopesTime FactorsSulfur RadioisotopesRodenticidesDiagnostic Techniques, RadioisotopeTomography, Emission-ComputedDyspepsiaRadiation ProtectionPenicillinsRadionuclide VentriculographySensitivity and SpecificityCadmium RadioisotopesRadioimmunotherapyAstatinePoisoningLutetiumRheniumGated Blood-Pool ImagingRadiometric DatingAntimonyHydrocarbons, IodinatedSamariumSoil Pollutants, RadioactiveIodobenzenesGastric MucinsProton Pump InhibitorsTandem Mass Spectrometry