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Amyloid imaging in dementia

Published online by Cambridge University Press:  06 November 2012

A Ashraf ,
P Mehta  and
P Edison
A Ashraf
Affiliation:
Centre for Brain Sciences, Department of Medicine, Imperial College London
P Mehta
Affiliation:
Centre for Brain Sciences, Department of Medicine, Imperial College London
P Edison*
Affiliation:
Centre for Brain Sciences, Department of Medicine, Imperial College London
*
Address for correspondence: Dr Paul Edison, Centre for Brain Sciences, Department of Medicine, Imperial College London, MRC Cyclotron Building, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK. Email: paul.edison@imperial.ac.uk
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Summary

A major advancement in the field of medicine has been the timely advent of amyloid imaging, which has allowed critical evaluation of the complex relationship between amyloid β peptide (Aβ) aggregation and Alzheimer's disease in vivo. Most importantly, amyloid imaging has the potential to detect Aβ in mildly affected as well as asymptomatic individuals, when the therapeutic window of opportunity might still be open to pharmacological intervention. It also shows significant promise in differential diagnosis of mild cognitive impairment or atypical dementias. Amyloid imaging studies support a model in which amyloid aggregation is considered an early event on the path of dementia, beginning insidiously in cognitively healthy individuals being accompanied by subtle cognitive, functional and structural brain alterations suggestive of incipient AD. As individuals progress to dementia, clinical decline and neurodegeneration accelerate and might proceed independently of amyloid accumulation. In this review we focus on amyloid imaging with particular emphasis on [11C]PIB in AD, mild cognitive impairment and other dementias, and discuss the advances made in this perplexing field.

Keywords

amyloid imaging[11C]PIB-PETAlzheimer's diseasemild cognitive impairmentcognitively normal controls
Type
Neuropsychiatry of old age
Information
Reviews in Clinical Gerontology , Volume 23 , Issue 1 , February 2013 , pp. 43 - 60
Copyright
Copyright © Cambridge University Press 2012

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