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IMAGING BRAIN NETWORKS – SHORT PRESENTATION OF NEW TECHNIQUES
A. Roceanu, M. Onu, L. Badea and O. Bajenaru
The brain is organised into large-scale functional networks with interactions between them. For the purpose of imaging brain networks, two fMRI techniques are particulary helpful. Diffusion tensor imaging (DTI) is based on the detection of water diffusion, which occurs preferentially in the longitudinal direction of axons, providing a mean to imagine the anatomy of axonal bundles. Functional connectivity is based on the relative synchroy of the blood-oxygen-level-dependent (BOLD) signal across brain regions that work together.
Keywords: brain network, functional connectivity, diffusion imaging, connectomics