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Patterns of brain atrophy on magnetic resonance imaging and the boundary between ageing and Alzheimer's disease

Part of: Bespoke shallow archive Weizmann

Published online by Cambridge University Press:  17 February 2010

Mike O'Sullivan
Mike O'Sullivan*
Affiliation:
Cardiff University Brain Research and Imaging Centre (CUBRIC), Schools of Psychology and Medicine, Cardiff University, UK
*
Address for correspondence: Dr Mike O'Sullivan, School of Psychology, Tower Building, Park Place, Cardiff CF10 3AT. Email: [email protected]
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Summary

Clinicians are increasingly faced with the problem of interpreting subtle, early cognitive symptoms. Enhanced awareness of Alzheimer's disease (AD) and available treatments has led to a growing demand for early assessment. Although it is known that a proportion of individuals with mild cognitive impairment will progress to dementia in following years, our ability to identify these individuals and predict individual cognitive trajectories is limited. The emergence of disease-modifying treatments would make these problems more acute. In this review, the potential role of magnetic resonance imaging (MRI) in aiding the clinician in early diagnosis of AD will be considered. The changes in grey matter structure that accompany ‘normal’ ageing will be described briefly, before moving on to studies that have attempted to distinguish the onset of disease from this background of structural change. Volumetric methods range from measurements of single key structures, such as the hippocampus, to methods based on computational neuroanatomy, which evaluate subtle structural alterations across the whole brain simultaneously. Computational methods are rapidly evolving and already perform as well as radiologists in distinguishing AD from normal ageing at an individual level. This article aims to provide a practical knowledge of how and why these methods work, point out the main advantages and disadvantages and sketch out outstanding issues and possible future directions.

Keywords

Ageingage-related memory disordersAlzheimer's diseasemagnetic resonance imagingmild cognitive impairment
Type
Neuropsychiatry of old age
Information
Reviews in Clinical Gerontology , Volume 19 , Issue 4 , November 2009 , pp. 295 - 307
Copyright
Copyright © Cambridge University Press 2010

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