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Magnetic resonance imaging (MRI) advances aid dementia diagnosis by revealing neurostructural changes. High-field MRI and specialized sequences detect early signs and differentiate dementia subtypes, improving diagnostic precision.

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Area of Science:

  • Neurology and Radiology
  • Neuroimaging and Diagnostics

Background:

  • Dementia diagnosis relies on clinical, neuropsychological, and neuroimaging assessments.
  • Advancements in Magnetic Resonance Imaging (MRI) technology have significantly improved the detection and characterization of neurostructural changes in neurodegenerative diseases.
  • This review focuses on the evolving role of MRI in diagnosing dementia and its subtypes.

Purpose of the Study:

  • To provide a comprehensive overview of recent advances in MRI for diagnosing dementia, with a focus on the last six years.
  • To discuss technical aspects of MRI acquisition for both clinical and research settings.
  • To describe MRI findings indicative of dementia and its subtypes, including supportive scoring systems.

Main Methods:

  • Retrospective literature review of PubMed and ScienceDirect databases.
  • Keywords used: "dementia", "imaging", "MRI".
  • Inclusion of English scientific papers focusing on MRI's diagnostic role in dementia, with a emphasis on articles published after 2018 (55% of total).

Main Results:

  • High-field MRI (3T) and specialized sequences enable early detection of structural changes associated with dementia.
  • Characteristic neuroanatomical MRI patterns aid in differentiating between various dementia subtypes.
  • Established scoring systems, such as the MTA score for Alzheimer's disease, enhance the quantification and categorization of MRI findings.

Conclusions:

  • The integration of clinical evaluation with high-field MRI methodologies offers a nuanced understanding of brain changes in dementia.
  • Emerging ultra-high-field (7T) MRI represents a significant research advancement, though clinical application is currently limited.
  • MRI is a pivotal tool in enhancing the precision and scope of dementia diagnosis and subtyping.