[Freesurfer] Log transformation vertex-wise

External Email - Use Caution

Hello FreeSurfer Developers,

I have a technical question for which I have not yet found the answer. First, I am running FreeSurfer stable-pub-v6.0.0-2beb96c on CentOS 7.

Now to the question: is there a way to apply, say, a logarithmic transformation vertex-wise? For example, while doing a whole-brain analysis for cortical thickness with mri_glmfit it would calculate everything with the logarithmic value instead of mm.

If this is not implemented, do you have an idea of how I could achieve this? Perhaps extracting the matrix with the values of each vertex and reading it in Matlab?

Thanks in advance.

José