Online Filtering Tractography: Tracking with Anatomical Priors

Gabriel Girard¹, Maxime Descoteaux¹

This abstract investigates how the mask affects streamline tractography. The discrete binary mask is an aggressive stopping criterion that can result in a large proportion of prematurely stopping streamlines [1]. We propose a method called Online Filtering Tractography (OFT) which propagates simultaneously multiple streamlines using the full partial volume fraction maps to enforce the tracking in the white matter and stop in gray matter. Streamlines propagating in cerebrospinal fluid partial volume fraction map are iteratively repressed. Results of OFT using partial volume fraction maps overcome some limits of tracking with binary mask.