Geometric effects of volume-to-surface mapping of fMRI data.
Brain Struct Funct
; 227(7): 2457-2464, 2022 Sep.
Article
em En
| MEDLINE
| ID: mdl-35895147
ABSTRACT
In this work, we identify a problem with the process of volume-to-surface mapping of functional Magnetic Resonance Imaging (fMRI) data that emerges in local connectivity analysis. We show that neighborhood correlations on the surface of the brain vary spatially with the gyral structure, even when the underlying volumetric data are uncorrelated noise. This could potentially have impacted studies focusing upon local neighborhood connectivity. We explore the effects of this anomaly across varying data resolutions and surface mesh densities, and propose several measures to mitigate these unwanted effects.
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Base de dados:
MEDLINE
Assunto principal:
Mapeamento Encefálico
/
Imageamento por Ressonância Magnética
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article