Hi Anastasia and FS experts,
I am trying to create a white matter ROI mask underneath a cortical ROI label (e.g., 2 mm into the white matter) created in fsaverage space. I will then use this mask to extract values from individual dtifit_FA and dtifit_MD maps generated by trac-all. What would be the easiest way to do this? I thought about using mri_aparc2aseg but I am not quite sure about how to specify a label with this command.
Thanks so much for your help!
Best, Hamdi