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Hi Dr Greve, I appreciate your guidance very much.

I followed your suggestion. I put lh.cerebellum in fsaverage and I ran mri_vol2surf.

as follows:

mri_vol2surf --mov grf.th1.3.pos.sig.cluster.mgh --hemi lh --surf cerebellum --mni152reg --o grf_onto_cerebellum.nii.gz

Now I am getting this error

ERROR: number of vertices in /FSV6.0/fsaverage/surf/lh.thickness does not match surface (163842,34247)

Any suggestions are appreciated ;-)

John

You will have to put the cerebellar surface in fsaverage/surf/lh.cerebellum Note use "lh" even if it is the entire cerebellum as FS commands generally require a hemisphere.

The run mri_vol2surf specifying --hemi lh --surf cerebellum

On 1/23/19 10:04 AM, john Anderson wrote:

> External Email - Use Caution

> Dear FS experts,

> I ran surface based PET analysis on subcortical regions. Then

> corrected the results for multiple comparisons using the method --grf

> in the command mri_glmfit-sim.

> I can visualize the output of multiple comparisons (i.e. the file

> grf.th1.3.pos.sig.cluster.mgh) on volume using tkmedit, this

> statistical map shows difference between the groups in the

> cerebellum.... Instead of visualizing the results on volume, I want to

> move this file to the cerebellum surface. I already created the

> cerebellum surfaces from aseg.mgz file in fsaverage using the command

> mris_tesselate.

> How can I move the the file grf.th1.3.pos.sig.cluster.mgh from volume

> space and map it on the cerebellum surface?

> I tried mri_vol2surf but this command requires the flag --hemi as a

> result it will map the file "grf.th1.3.pos.sig.cluster.mgh" on

> cerebral hemispheres (lh or rh) but not the cerebellum..

> How can I map the file "grf.th1.3.pos.sig.cluster.mgh" on the

> cerebellum surface?

> Thanks for any suggestions,

> John

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