Cervical AtlasAtlases as TopicAtlasesAxisModels, AnatomicImaging, Three-DimensionalSubtraction TechniqueImage Interpretation, Computer-AssistedAtlanto-Occipital JointHistologyAtlanto-Axial JointPattern Recognition, AutomatedMagnetic Resonance ImagingBrainImage Processing, Computer-AssistedImage EnhancementAlgorithmsAnatomy, Cross-SectionalStereotaxic TechniquesNeuroanatomyReproducibility of Results