Dear FS experts,

I would like to run surface based analysis using FA maps. I am not exactly sure that what I am doing is totally right specially step 2 . I used the following commands:

1. I registered the FA maps to T1 using the command:  bbregister --s bert --mov dtifit_FA.nii --bold --init-fsl --reg  reg.dat

2. I concatenated the subject’s FA maps using the command :  mris_preproc –target fsaverage –hemi lh –iv .bert1/dtifit_FA.nii reg.dat –iv bert2/dtifit_FA.nii reg.dat …. --projfrac 0.5 --out lh.FA.mgz

3. Then smoothing mri_surf2surf --hemi lh --s fsaverage --fwhm 5 --cortex --sval  lh.FA.mgz --tval lh.FA_5mm.mgz

4. Then GLM analysis using mri_glmfit

5. Correction for multiple comparison mri_glmfit-sim

Kindly, are these steps correct? I used the previous steps to do surface based analysis using PET images and it worked very well. While for the FA maps it seems that there is something wrong and I can’t figure out what it is!

I highly appreciate any input on this!

Best,

Mohamad