You can use the "per vertex regressor" functionality in mri_glmfit. You create a stack of on of the modalities that you pass with the --pvr flag. This adds the value for each subject as a column in the design matrix. You'll need to create contrast matrices with this extra regressor in mind

On 07/27/2016 03:33 PM, Elijah Mak wrote:

Dear Freesurfer Community,

I am currently trying to investigate the local correlations across 2 modalities (i.e. Tau-PET and cortical thinning). I understand that this sort of questions has been conventionally addressed using the Biological Parametric Mapping (BPM) toolbox in MATLAB.

Is there a way in Freesurfer to properly address this?

My PET data have already been registered and projected to the surfaces for each individual.

Thanks a lot.

Best Wishes, Elijah

--

Elijah Mak

PhD Candidate *|* Psychiatry

University of Cambridge

Trinity College, Cambridge, CB2 1TQ

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