Radioactive Hazard ReleaseChemical Hazard ReleaseCesiumCesium RadioisotopesCesium IsotopesRadionuclide ImagingRadionuclide AngiographyRadioisotopesRadionuclide VentriculographyWater Pollutants, RadioactiveTechnetiumSoil Pollutants, RadioactiveRadionuclide GeneratorsProportional Hazards ModelsFood Contamination, RadioactiveSodium Pertechnetate Tc 99mStrontium RadioisotopesFukushima Nuclear AccidentSpectrometry, GammaRadiation MonitoringGated Blood-Pool ImagingRadiometryRadioactivityNuclear Power PlantsRheniumRadiopharmaceuticalsAlpha ParticlesRadioactive FalloutVentriculography, First-PassPotassium RadioisotopesPlutoniumPentetic Acid