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. Author manuscript; available in PMC: 2013 Sep 9.
Published in final edited form as: IEEE Trans Med Imaging. 2013 Jan 25;32(6):969–982. doi: 10.1109/TMI.2012.2231873

Fig. 12.

Fig. 12

(a) Spatial smoothing was performed within subgroups GA of HR voxels, intersected by the same LR voxel. The smoothing was performed using a weighted average of the signals within the subgroup, with the weights for each voxel defined by the smoothing extent. The smoothing extent (fraction of the voxel dimensions) defined the contributions of the neighbors and the weights were proportional to the relative volumes of the contributed (gray-shaded) regions. (b) Normalized histograms of orientation dissimilarity differences (in degrees) between subgroups GA and GB. Red corresponds to RubiX estimates and blue to ball & stick. The histograms depicted by black and gray colors correspond to ball & stick estimates from smoothed datasets. Dissimilarity differences are computed across WM. All models had an ARD prior for f2. For RubiX, the priors on the nuisance parameters (fs, d) were also utilized.