LutetiumSilicatesPhotosensitizing AgentsTomography Scanners, X-Ray ComputedRadioisotopesPhantoms, ImagingPositron-Emission TomographyPhotochemotherapyRadionuclide ImagingRadionuclide AngiographyFood Contamination, RadioactiveSoil Pollutants, RadioactiveLead RadioisotopesRadionuclide GeneratorsEquipment DesignCesium RadioisotopesTechnetiumSpectrometry, GammaTantalumGold RadioisotopesRadionuclide VentriculographyPotassium RadioisotopesAstatineAlpha ParticlesRadiopharmaceuticalsGallium RadioisotopesIndiumRadioactive Hazard Release