we don't have a binary to do it, but you can do it in matlab with results from glmfit. Make two contrasts, one for the difference [+1 -1], and one for the average [0.5 0.5]. Each contrast will have a gamm.mgh file in the ouput. Load each of these into matlab with MRIread(), then just compute the percent change and save with MRIwrite().

doug

Jonathan Rohrer wrote:

Is it possible to generate surface maps for the percent difference in cortical thickness between 2 groups within freesurfer?

Best wishes Jon Rohrer

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