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Abstract #4294

Comparison between discrete and continuous propagator indices from Cartesian q-space DSI sampling

Mauro Zucchelli 1 , Eleftherios Garyfallidis 2 , Michael Paquette 2 , Sylvain Merlet 3 , Gloria Menegaz 1 , and Maxime Descoteaux 2

1 Department of Computer Science, University of Verona, Verona, Italy, 2 Sherbrooke Connectivity Imaging Lab (SCIL), Universit de Sherbrooke, Sherbrooke, Quebec, Canada, 3 INRIA Sophia Antipolis-Mditerrane, Sophia Antipolis, France

DSI was one of the first techniques used to infer complex fiber configurations. However, DSI discrete propagator representation suffers from a limited frequency band, which makes infinite integration impossible. This abstract aims at comparing DSI propagator derived indices with those obtained on a continuous analytical model like SHORE. The models were tested both on simulated and human data on a Cartesian grid sampling scheme. The indices used for the comparison were the orientation distribution function, the return to the origin probability and the mean square displacement. Results indicate that the 3D-SHORE provides an improved estimation of the signal properties.

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