I am trying to figure out how to manually expand the pial surface boundary (generated via automatic segmentation with recon-all) to include additional gray matter voxels which have been erroneously labeled as skull or CBF. 

i found extensive documentation on how to delete voxels (for example from white matter mask), but i can't seem to find relevant information advising how to manually include some missing gray matter voxels (on either ends of the cortex - i.e. white matter/gray matter boundary or gray matter/pial surface boundary).

Any help would be appreciated.



--
Kendrick Kay, PhD
Assistant Professor
Center for Magnetic Resonance Research
University of Minnesota, Twin Cities
   Web: http://cvnlab.net
E-mail: kay@umn.edu
  Cell: 510-206-1059
 Skype: kendrickkay