Dear Freesurfer Experts, <br><br>I am processing some coronally acquired 3T GE FSPGR T1 volumes.  I have noticed that on occasion slices pial and white surfaces at the very front of the brain can go very wrong - either frontal slices are excluded all together (present in brainmask.mgz but no pial or wm surfaces derived) or white matter is mistakenly classified as grey matter.  <br>
<br>In order to correct this am I correct in assuming that the best method would be to use control points to fix the intensity normalisation ?  Alternatively, when is it better to edit the wm.mgz volume to include those voxels which are white matter ? - It is not entirely clear to me from the tutorial.<br>
<br>Thank you.<br><br>M<br>