FA for typical neural pathways

Greetings! I’ve developed a pipeline for DTI-FA processing, but it works for the entire AAL atlas’ ROIs. My point is I’m trying to perform the same pipeline, but constraining my processing to the typical neural pathways (corona radiata, corpus callosum, arcuate fasciculum and such). I know my command of interest is the tckgen, but I don’t know how to work with it in order to constraint the analysis.

Any help?

Thanks all!

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