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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