Hello,
I would like to know how probtrackx2 uses its fibre orientation PDFs while generating streamlines. Unfortunately, I'm having trouble fully understanding Behrens et al (2003), and I haven't found answers on the forum. Let's say that a streamline is currently at a point near the edge of voxel v. Will the direction of the next step be sampled from the PDF of v alone? Or, will some interpolation of neighbouring PDFs be used?
Best,
Jackson
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