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Hello,
I am trying to view network based maps produced from a meta-analysis using neuroelf on the surface in freesurfer. The meta-analytic maps are thresholded maps that represent the proportion of contrasts that activated at each voxel
I projected my maps on the surface using: mri_vol2surf --src negative_allsocial_proportion.img --regheader mni152_subject --hemi lh --o ./neg_allsocial_lh.nii --projfrac 0.5
Then to view it used: tksurfer mni152_subject lh inflated -overlay ./neg_allsocial_lh.nii -fthresh 0.05
The issue I have is with the fthresh value. I read the wiki and some stuff on archive about the fthresh value but I am unsure what it exactly means and does. My issue is that the display of my maps changes when I change the fthresh value even though the maps have been k-thresholded using neuroelf before exporting them to freesurfer. More area is marked up when I decrease the threshold value from 0.1 to 0.05 and nothing is visible above 0.1
Does anyone have any thoughts about what might be going on there and how I can fix it? Do I need to do something totally different from what I am doing?
Best, Srishti Social/Clinical Research Specialist Child Imaging Research and Life Experiences Lab University of North Carolina at Chapel Hill email (W): srishtig@email.unc.edu skype: srishti.goel12