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Abstract #3552

Intuitive Angle-Aware Bilateral Filtering Revealing Asymmetric Fiber ODF for Improved Fiber Tractography

Charles Poirier1 and Maxime Descoteaux1
1Computer Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada


Although the voxel-wise signal acquired by diffusion MRI is symmetric, it is not always the case of the underlying fiber configurations. We present angle-aware bilateral filtering, an intuitive method for denoising fiber ODF fields revealing asymmetric fiber ODFs. To evaluate the effect of the filtering, tractography is performed on the resulting asymmetric fiber ODF field. Compared to the tractogram obtained from the original fiber ODF field, we show that using asymmetric filtered fiber ODF field as input to a fiber tracking algorithm reduces the ratio of incomplete streamlines and false connections and increases the proportion of true connections.

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