DSI 101: Better ODFs for free!
Michael Paquette 1 , Sylvain Merlet 2 , Rachid Deriche 2 , and Maxime Descoteaux 1
Universite de Sherbrooke, Sherbrooke,
Sophia Antipolis, Sophia Antipolis, France
Diffusion Spectrum Imaging (DSI) is a well established
method to recover the diffusion propagator (EAP). The
orientation distribution function (ODF) is computed from
this discretized EAP and used for tractography. However,
there are several important implementation
considerations that are tossed aside in the literature
and the publicly available softwares. We investigate all
the real steps necessary to go from the DSI signal to
the ODF and provide applicable recommendations that
greatly improve the accuracy of the local orientation
detected. These recommendations come free-of-charge as
they are applicable to all existing DSI data and do not
require a significant increase in computation time.
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