Dear FSL experts,
I'm comparing the error histograms for the masked dyads2 (threshold 0.05) obtained with bedpostX and second eigenvector (_V2) on the same voxels using dtifit after registering 2 images. BedpostX errors (relative to the reference image) below 60 degrees are consistently lower in frequency than those computed using dtifit, but after 60 degrees the BedpostX errors are consistently higher in frequency than those obtained with dtifit. On the other hand, comparing the error histogram for dyads1 from BedpostX vs first eigenvector from dtifit are very similar (as I expected).
Have you ever compared these 2 methods along the second eigenvectors? Do these results have an explanation?
Julio
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