Hi Erik

is there a reason not to do it for the whole group? I guess if the one subject you uploaded had significant motion (which caused the blurryness) then it might be the case that it needs separate parameters. In general though it's good to hold this kind of thing constant as it will definitely bias you to having greater thickness. Try it on some of the other subjects and see if the surfaces are at least as accurate as without, and if so do it uniformly

cheers Bruce

On Wed, 12 Feb 2014, Erik Lindberg wrote:

Dear Freesufers, I am trying to understand what happens if I go in and edit the numbers for -min_border_white  -min_gray_at_white_border  in a single subjects in a large group.

Generally we aim to set everything identical when running a group of subjects in FS.  I went in and had a look at the recon-all log file and I can see that the numbers for -min_border_white  -min_gray_at_white_border  different for different subjects.

Thus - what will happened if I go and edit the -min_border_white  -min_gray_at_white_border numbers for  a single subjects in a large bach .... will I still be able compare cortical thickness with subjects that I did not edit?

Or is it necessary to keep the number identical for all subjects when editing the min_border_white  -min_gray_at_white_border