Insight on AV-45 binding in white and grey matter from histogram analysis: A study on early Alzheimer's disease patients and healthy subjects

Federico Nemmi, Laure Saint-Aubert, Djilali Adel, Anne Sophie Salabert, Jérémie Pariente, Emmanuel J. Barbeau, Pierre Payoux, Patrice Péran

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: AV-45 amyloid biomarker is known to show uptake in white matter in patients with Alzheimer's disease (AD), but also in the healthy population. This binding, thought to be of a non-specific lipophilic nature, has not yet been investigated. The aim of this study was to determine the differential pattern of AV-45 binding in white matter in healthy and pathological populations. Methods: We recruited 24 patients presenting with AD at an early stage and 17 matched, healthy subjects. We used an optimized positron emission tomography-magnetic resonance imaging (PET-MRI) registration method and an approach based on an intensity histogram using several indices. We compared the results of the intensity histogram analyses with a more canonical approach based on target-to-cerebellum Standard Uptake Value (SUVr) in white and grey matter using MANOVA and discriminant analyses. A cluster analysis on white and grey matter histograms was also performed. Results: White matter histogram analysis revealed significant differences between AD and healthy subjects, which were not revealed by SUVr analysis. However, white matter histograms were not decisive to discriminate groups, and indices based on grey matter only showed better discriminative power than SUVr. The cluster analysis divided our sample into two clusters, showing different uptakes in grey, but also in white matter. Conclusion: These results demonstrate that AV-45 binding in white matter conveys subtle information not detectable using the SUVr approach. Although it is not more efficient than standard SUVr in discriminating AD patients from healthy subjects, this information could reveal white matter modifications.

Original languageEnglish
Pages (from-to)1408-1418
Number of pages11
JournalEuropean Journal of Nuclear Medicine and Molecular Imaging
Volume41
Issue number7
DOIs
Publication statusPublished - 2014

Keywords

  • Alzheimer's disease
  • Amyloid
  • AV-45
  • Discrimination analysis
  • Intensity histogram

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Medicine(all)

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