PhotonsGene FrequencyTomography, Emission-Computed, Single-PhotonElementary ParticlesLightPhantoms, ImagingScattering, RadiationMonte Carlo MethodRadiometryTime FactorsScintillation CountingRadiation DosageMicroscopy, Fluorescence, MultiphotonOrganotechnetium CompoundsParticle AcceleratorsEquipment DesignEquipment Failure AnalysisRadiopharmaceuticalsTechnetium Tc 99m ExametazimeComputer SimulationAllelesThallium RadioisotopesGenotypeMutationTechnetiumDose-Response Relationship, RadiationTomography, Emission-ComputedOximesAlgorithmsReproducibility of ResultsRelative Biological EffectivenessRadiotherapy Planning, Computer-AssistedPolymorphism, GeneticOptics and PhotonicsSensitivity and SpecificityTelluriumRadiotherapy, High-EnergyImage Processing, Computer-AssistedRadiotherapy DosageOptical ProcessesIodine RadioisotopesLasersTomography, OpticalSpectrum AnalysisSemiconductorsProton TherapyPhotometryModels, TheoreticalModels, BiologicalAction PotentialsSignal Processing, Computer-AssistedVision, OcularVibrationRadiationCase-Control StudiesGamma CamerasX-RaysDiagnostic ImagingElectronsAcoustic StimulationRadioisotopesBrainQuantum TheoryElectric StimulationLuminescent MeasurementsTransducersRetinal Rod Photoreceptor CellsPhotic StimulationIofetamineSpectrometry, GammaCadmium CompoundsLinear Energy TransferFourier AnalysisSynchrotronsTomography, X-Ray ComputedLutetiumRhodopsinPositron-Emission TomographyElectroencephalographyLuminescenceHaplotypesHeavy Ion RadiotherapyRadionuclide ImagingPolymorphism, Single NucleotideComputer-Aided DesignThalliumPhotoreceptor CellsElectrophysiologyCerebrovascular CirculationAdaptation, OcularGenetic VariationXenon RadioisotopesFluorescenceNeuronsAuditory ThresholdBase SequenceNeutronsMolecular Sequence DataMagnetic Resonance ImagingPolymerase Chain Reaction