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High Resolution Imaging of the Medial Temporal Lobe in Alzheimer's Disease and Dementia with Lewy Bodies

Lookup NU author(s): Dr Michael Firbank, Professor Andrew Blamire, Dr Andrew Teodorczuk, Dr Emma Teper, Dr Emma Burton, Professor John O'Brien

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Abstract

We used high resolution (0.3 mm in-plane) coronal 3T magnetic resonance (MR) imaging of the medial temporal lobe in 16 subjects with Alzheimer's disease (AD), 16 with dementia with Lewy bodies (DLB), and 16 similarly aged healthy subjects. On the anterior section of the hippocampus body, regions of interest were manually drawn blind to diagnosis on the CA1, CA2, and CA3/4 subregions, and the width of the subiculum and entorhinal cortex was measured. Controlling for intracranial volume, age, and years of education, we found the subiculum thickness was significantly reduced in AD (2.03 +/- 0.29 mm) compared to both control (2.37 +/- 0.28 mm, p = 0.008) and DLB (2.35 +/- 0.24 mm, p = 0.001) subjects. The area of CA1 was likewise reduced in AD compared to controls and DLB. In the hippocampus images, a hypointense line is visible between CA1 and CA3/4. This line was significantly less distinct in AD, suggesting disease related changes to this region. Future studies should investigate whether subiculum thickness or the hypointense line could be a diagnostic feature to help discriminate AD from DLB.


Publication metadata

Author(s): Firbank MJ, Blamire AM, Teodorczuk A, Teper E, Burton EJ, Mitra D, O'Brien JT

Publication type: Article

Publication status: Published

Journal: Journal of Alzheimer's Disease

Year: 2010

Volume: 21

Issue: 4

Pages: 1129-1140

Print publication date: 06/08/2010

ISSN (print): 1387-2877

ISSN (electronic): 1875-8908

Publisher: IOS Press

URL: http://dx.doi.org/10.3233/JAD-2010-100138

DOI: 10.3233/JAD-2010-100138

PubMed id: 20693645


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