Technetium Tc 99m MedronateTomography, X-Ray ComputedImage Processing, Computer-AssistedImage Interpretation, Computer-AssistedRadiographic Image EnhancementRadiographic Image Interpretation, Computer-AssistedImaging, Three-DimensionalReproducibility of ResultsAlgorithmsSensitivity and SpecificitySubtraction TechniquePattern Recognition, AutomatedObserver VariationBrainDiagnostic ImagingCone-Beam Computed TomographyContrast Media