Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9990953 | NeuroImage: Clinical | 2018 | 8 Pages |
Abstract
Normalization by cerebellar gray matter and pons yielded identical classification accuracy of AD (accuracy-96%, sensitivity-96%, specificity-95%), and significantly higher than Aβ concentrations (best accuracy 91%). Normalization by the white-matter showed decreased extent of statistically significant multivoxel patterns and was the only method not outperforming CSF biomarkers, suggesting statistical inferiority. Aβ38 and Aβ40 correlated negatively with PiB-PET images normalized by the white-matter, corroborating previous observations of correlations with non-AD-specific subcortical changes in white-matter. In general, when using the pons as reference region, higher voxel-wise group differences and stronger correlation with Aβ42, the Aβ42/Aβ40 or Aβ42/Aβ38 ratios were found compared to normalization based on cerebellar gray matter.
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Authors
Francisco Oliveira, Antoine Leuzy, João Castelhano, Konstantinos Chiotis, Steen Gregers Hasselbalch, Juha Rinne, Alexandre Mendonça, Markus Otto, Alberto Lleó, Isabel Santana, Jarkko Johansson, Sarah Anderl-Straub, Christine Arnim, Ambros Beer,