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Amyloid imaging in cognitively normal older adults: comparison between F-18-flutemetamol and C-11-Pittsburgh compound B
Katholieke Univ Leuven, Lab Cognit Neurol, B-3000 Leuven, Belgium.;Katholieke Univ Leuven, Leuven Inst Neurosci & Dis, Alzheimer Res Ctr, B-3000 Leuven, Belgium..
Katholieke Univ Leuven, Lab Cognit Neurol, B-3000 Leuven, Belgium.;Katholieke Univ Leuven, Leuven Inst Neurosci & Dis, Alzheimer Res Ctr, B-3000 Leuven, Belgium..
Katholieke Univ Leuven, Lab Cognit Neurol, B-3000 Leuven, Belgium.;Univ Oxford, Dept Psychiat, Oxford OX3 7JX, England..
Katholieke Univ Leuven, Lab Cognit Neurol, B-3000 Leuven, Belgium.;Katholieke Univ Leuven, Leuven Inst Neurosci & Dis, Alzheimer Res Ctr, B-3000 Leuven, Belgium..
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2016 (engelsk)Inngår i: European Journal of Nuclear Medicine and Molecular Imaging, ISSN 1619-7070, E-ISSN 1619-7089, Vol. 43, nr 1, s. 142-151Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Purpose Preclinical, or asymptomatic, Alzheimer's disease (AD) refers to the presence of positive AD biomarkers in the absence of cognitive deficits. This research concept is being applied to define target populations for clinical drug development. In a prospective community-recruited cohort of cognitively intact older adults, we compared two amyloid imaging markers within subjects: F-18-flutemetamol and C-11-Pittsburgh compound B (PIB). Methods In 32 community-recruited cognitively intact older adults aged between 65 and 80 years, we determined the concordance between binary classification based on F-18-flutemetamol versus C-11-PIB according to semiquantitative assessment (standardized uptake value ratio in composite cortical volume, SUVRcomp) and, alternatively, according to visual reads. We also determined the correlation between F-18-flutemetamol and C-11-PIB SUVR and evaluated how this was affected by the reference region chosen (cerebellar grey matter versus pons) and the use of partial volume correction (PVC) in this population. Results Binary classification based on semiquantitative assessment was concordant between F-18-flutemetamol and C-11-PIB in 94 % of cases. Concordance of blinded binary visual reads between tracers was 84 %. The Spearman correlation between F-18-flutemetamol and C-11-PIB SUVRcomp with cerebellar grey matter as reference region was 0.84, with a slope of 0.98. Correlations in neocortical regions were significantly lower with the pons as reference region. PVC improved the correlation in striatum and medial temporal cortex. Conclusion For the definition of preclinical AD based on F-18-flutemetamol, concordance with C-11-PIB was highest using semiquantitative assessment with cerebellar grey matter as reference region.

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2016. Vol. 43, nr 1, s. 142-151
Emneord [en]
Amyloid PET, Biomarker, Alzheimer's disease, Preclinical AD
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Identifikatorer
URN: urn:nbn:se:uu:diva-274271DOI: 10.1007/s00259-015-3156-9ISI: 000366627000016OAI: oai:DiVA.org:uu-274271DiVA, id: diva2:910403
Tilgjengelig fra: 2016-03-09 Laget: 2016-01-20 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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