Dear freesurfer experts,
I am using freesurfer to analyze my PET data according to the tutorial online. It works pretty well and I write the values of the results of each region to the template with Matlab (file attached here entitled "lh.subj1.mgz"). However, when I try to open it with freeview, the image looks quite strange ('Picture_1') but it works with tksurfer (Picture_2). Does any one know what is wrong with this? Did I plot the result in a wrong way?

Thanks very much