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Last name: CALISSANO
First name: Anna
International audience
Barycentric Subspaces have been defined in the context of manifolds using the notion of exponential barycenters. In this work, we extend the definition to quotient spaces which are not necessary manifolds. We define an alignment map and an horizontal logarithmic map to introduce Quotient Barycentric Subspaces (QBS). Due to the discrete group...
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Every brain is unique, having its structural and functional organisation shaped by both genetic and environmental factors over the course of its development. Brain image studies tend to produce results by averaging across a group of subjects, under a common assumption that it is possible to subdivide the cortex into homogeneous areas while...
Structural parcellations are often built under the assumption of parcels' correspondences across patients. In the current work, we test the robustness of this hypothesis using graph matching strategies. Given a structural parcellation, we analyse a set of patients at different parcellation granularity (from 50 up to 1000 parcels). The aim of...
Every brain is unique, having its structural and functional organization shaped by both genetic and environmental factors over the course of its development. Brain image studies tend to produce results by averaging across a group of subjects, under the common assumption that it is possible to subdivide the cortex into homogeneous areas while...
International audience
Due to structural and functional brain variability between subjects, cortical atlases may contain errors, such as a label mismatch across subjects. Indeed, a particular region of one subject might not correspond structurally or functionally to the region with the same label of another subject. Previous work showed thatit is possible to increase...
By subdividing the cortex into regions according to a given atlas, we assume that all the regions match across different subjects. However, because of inter-subject variability, it may not be possible to produce a single brain atlas for all subjects. Previous works have proposed to use structural connectomes constructed from diffusion magnetic...