You might not be doing anything wrong. Try going to those vertices on the surface and see if they are part of the cluster. Those vertices are the places that have the highest significance. You can have it report the centroid if you prefer.
On 07/05/2018 03:20 PM, John Anderson wrote:
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Dear Freesurfer experts, I ran surface based analysis between two groups using PET surfer to study the difference in PET signal between two groups. I followed the same steps as in wiki and everything went fine. To visualize the final statistical maps, I used the command: tksurfer fsaverage lh pial -overlay -overlay cache.th20.pos.sig.cluster.mgh
The report "cache.th20.pos.sig.cluster.summary" shows two significant structures (attached figure 1). Looking at the figure from the output of tksurfer (attached figure 2). I see significant results in the frontal lobe.
Please what I am doing wrong? Your guidance is highly appreciated John
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