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Abstract #3508

Differential Radiologic-Pathologic Correspondence of Diffusivity, Restriction and Anisotropy with Plaque and Tangle Cores

Courtney J Comrie1, Laurel A Dieckhaus1, Tom G Beach2, Geidy E Serrano2, and Elizabeth B Hutchinson1
1Biomedical Engineering, University of Arizona, Tucson, AZ, United States, 2Brain and Body Donation Program, Banner Sun Health Research Institute, Sun City, AZ, United States

Synopsis

Keywords: Alzheimer's Disease, Alzheimer's DiseaseAlzheimer’s is an irreversible degenerative brain disease. Clinical MRI may visualize severe brain atrophy but fails to recognize earlier biomarkers associated with subtle microstructural changes. Microstructural MRI techniques such as DTI, MAP-MRI, and MSDKI may sensitively detect and distinguish tissue degeneration, tauopathies, and beta amyloid plaques in the hippocampus and entorhinal cortex. The capability of these techniques was investigated in post-mortem human temporal lobe specimens at high resolution and high image quality. Prominent findings seen were differences between DTI and MAP-MRI anisotropy metrics, and striking differences between the hippocampus and entorhinal cortex for restriction due to plaques.

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Keywords