Abstract : In this paper we address two problems related to the parametric reconstruction of the diffusion signal in the complete 3D Q-space. We propose a modified Spherical Polar Fourier (mSPF) basis to naturally impose the continuity of the diffusion signal on the whole space. This mathematical constraint results in a dimension reduction with respect to the original SPF basis. In addition, we derive the expression of a Laplace regularization operator in this basis, and compute optimal regularization weight using generalized cross validation (GCV). Experiments on synthetic and real data show that this regularization leads to a more accurate reconstruction than the commonly used low-pass filters.
Type de document :
Communication dans un congrès
ISBI - 9th IEEE International Symposium on Biomedical Imaging, May 2012, Barcelona, Spain. 2012
https://hal.inria.fr/hal-00660635
Contributeur : Emmanuel Caruyer
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Soumis le : mardi 17 janvier 2012 - 11:17:51
Dernière modification le : jeudi 11 janvier 2018 - 16:24:43
Document(s) archivé(s) le : lundi 19 novembre 2012 - 13:50:28
