LutetiumSilicatesCopper RadioisotopesReceptors, SomatostatinHeterocyclic Compounds, 1-RingPhotosensitizing AgentsTomography Scanners, X-Ray ComputedPositron-Emission TomographyPhantoms, ImagingPhotochemotherapyRadiation DosageRadiation, IonizingRadiation InjuriesDose-Response Relationship, RadiationEquipment DesignRadiation ToleranceRadiationRadiation ProtectionRadiation MonitoringIndium RadioisotopesRadiopharmaceuticalsRadiation OncologyHeterocyclic Compounds