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Abstract #2840

Surface tracking from the cortical mesh complements diffusion MRI fiber tracking near the cortex

Etienne St-Onge 1 , Gabriel Girard 1 , Kevin Whittingstall 2 , and Maxime Descoteaux 1

1 Sherbrooke Connectivity Imaging Lab, Universit de Sherbrooke, Sherbrooke, Qubec, Canada, 2 Department of Diagnostic Radiology, Faculty of Medicine and Health Science, Universit de Sherbrooke, Sherbrooke, Qubec, Canada

Conventional diffusion MRI fiber tracking methods have difficulty reconstructing white matter fiber structures near gray matter and have trouble penetrating into gyri and fully exploring the gyrus. Hence, the main limitation of current tractography techniques is the partial volume effect due to the tracking mask discretization in gyri and poor spatial resolution of the data. Our proposed surface tracking method successfully reconstructs fiber structures near the brain surface by only using a basic T1 anatomical image and shape information. With this method, we can see fanning in gyri, without the need of high resolution dMRI techniques.

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