afni.nimh.nih.gov

Hi Peter,

Thank you for your help. Yes, our surface ROIs come from Freesurfer. I have been unable though to find any documentation though regarding the mris_label_calc function on FreeSurferWiki or elsewhere online.

Would it be possible to erode a surface ROI using 3dcalc, with a similar technique used in example 11 of the 3dcalc help page? I understand the example applies to volumetric data, but could this be used on surface ROIs as well?

Dan