Tractography via the Ensemble Average Propagator in diffusion MRIReport as inadecuate

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1 ATHENA - Computational Imaging of the Central Nervous System CRISAM - Inria Sophia Antipolis - Méditerranée 2 SCIL - Sherbrooke Connectivity Imaging Laboratory

Abstract : It-s well known that in diffusion MRI dMRI, fibre crossing is an important problem for most existing diffusion tensor imaging DTI based tractography algorithms. To overcome these limitations, High Angular Resolution Diffusion Imaging HARDI based tractography has been proposed with a particular emphasis on the the Orientation Distribution Function ODF. In this paper, we advocate the use of the Ensemble Average Propagator EAP instead of the ODF for tractography in dMRI and propose an original and efficient EAP-based tractography algorithm that outperforms the classical ODF-based tractography, in particular, in the regions that contain complex fibre crossing configurations. Various experimental results including synthetic, phantom and real data illustrate the potential of the approach and clearly show that our method is especially efficient to handle regions where fiber bundles are crossing, and still well handle other fiber bundle configurations such as U-shape and kissing fibers.

Keywords : Diffusion MRI Compressed sensing Ensemble Average Propagator recovery Propagator Orientation Distribution Function Spherical Polar Fourier

Author: Sylvain Merlet - Anne-Charlotte Philippe - Rachid Deriche - Maxime Descoteaux -



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