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Brain MRI plays an integral role in the diagnostic evaluation of patients with cognitive symptoms. When interpreting brain MRI for cognitive impairment, radiologists should assess the following four key features: (1) white matter ischemic burden, (2) structural changes to suggest normal pressure hydrocephalus, (3) locoregional pattern of brain atrophy, and (4) presence of microhemorrhage or superficial siderosis, particularly for determining eligibility for anti-amyloid monoclonal antibody (MAB) treatment when appropriate. The recent approval and clinical adoption of anti-amyloid MAB expanded the role of neuroradiologists in evaluating eligibility and monitoring ARIA (amyloid-related imaging abnormality) among patients receiving anti-amyloid MAB. This advancement underscores the importance of standardized imaging protocols and effective communication between neuroradiologists and cognitive neurologists. Depending on the severity of ARIA and patients\u2019 symptoms, treatment may need to be suspended or discontinued. This review article explores brain MRI and FDG-PET\/CT imaging abnormalities in patients with major cognitive and movement disorders associated with dementia. It aims to assist radiologists in providing differential diagnoses within a clinical context. Finally, the article emphasizes the importance of recognizing co-pathologies, since patients may have more than one neurodegenerative disease rather than viewing these neurodegenerative diseases as being mutually exclusive.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Key Points<\/jats:title>\n                    <jats:p>\n                      <jats:bold>\n                        <jats:italic>Question<\/jats:italic>\n                      <\/jats:bold>\n                      <jats:italic>Traditional regional patterns of brain atrophy on MRI by neuroradiologists may not be effective given the recent advances in understanding of neurodegenerative disease and recognition of co-pathologies<\/jats:italic>\n                      .\n                    <\/jats:p>\n                    <jats:p>\n                      <jats:bold>\n                        <jats:italic>Findings<\/jats:italic>\n                      <\/jats:bold>\n                      <jats:italic>The locoregional atrophy and the patterns of metabolic abnormality help in the differential diagnosis of neurodegenerative disease. Remember that brain MRI determines eligibility for anti-amyloid immunotherapy<\/jats:italic>\n                      .\n                    <\/jats:p>\n                    <jats:p>\n                      <jats:bold>\n                        <jats:italic>Clinical relevance<\/jats:italic>\n                      <\/jats:bold>\n                      <jats:italic>Understanding clinical history is vital for interpreting brain MRI for patients with cognitive impairment or memory loss. Newly recognized entities such as limbic-predominant age-related TDP43 encephalopathy (LATE) can mimic Alzheimer disease among extremely elderly patients with amnestic symptoms with mesial temporal lobe atrophy<\/jats:italic>\n                      .\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00330-025-11940-3","type":"journal-article","created":{"date-parts":[[2025,9,3]],"date-time":"2025-09-03T15:59:48Z","timestamp":1756915188000},"page":"1746-1757","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The role of brain MR and FDG-PET in the diagnosis of neurodegenerative disease"],"prefix":"10.1007","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2988-7445","authenticated-orcid":false,"given":"Yoshimi","family":"Anzai","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Minoshima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,9,3]]},"reference":[{"key":"11940_CR1","unstructured":"WHO (2023) Dementia: key facts. 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