This document discusses radiological imaging findings in various types of dementia. It provides examples of MRI, FDG-PET, and amyloid PET scans showing characteristic patterns of atrophy and hypometabolism in conditions like Alzheimer's disease, frontotemporal dementia, Creutzfeldt-Jakob disease, and others. Medial temporal lobe atrophy on MRI is highlighted as an important tool for the diagnosis of Alzheimer's, and FDG-PET can help differentiate Alzheimer's from frontotemporal dementia based on patterns of hypometabolism. Magnetic resonance spectroscopy is also discussed as a tool for assessing metabolic changes in Alzheimer's patients.