Dear Doug,
thank you so much. I now have a value for each of my participants. Since I work with rate of change from pre to post time point I should interpret these values as mm per year that each subjects changes in thickness in this cluster, right? Because I have values between -3.37363 and 2.99830. Does that mean that these subject would lose or gain 3 mm per year in thickness in this specific area?
Thank you for you help! Clara
----- Ursprüngliche Mail ----- Von: "Douglas N Greve" greve@nmr.mgh.harvard.edu An: freesurfer@nmr.mgh.harvard.edu Gesendet: Donnerstag, 27. Juli 2017 19:10:50 Betreff: Re: [Freesurfer] extract values for significant cluster
You can use mri_segstats specifying the ocn as the segmentation, the stack of thicknesses as the input, and --avgwf file.dat as the output. Make sure to add --excludeid 0 to exclude background voxels
On 07/27/2017 06:18 AM, Clara Kühn wrote:
Dear FreeSurfer experts,
in the longitudinal 2 stage model I find a difference in rate between my two groups in right intra parietal sulcus for surface area (survives MC correction). I would like to look at the cortical thickness in that same cluster. Is it possible to use any of the output files from the MC correction as a mask or something to get the rate of change values for thickness in that region? Even though this region does not show a significant difference between the groups I would like to look at the individual values for rate of change in that specific region (like the ones I received in the cache.th30.abs.y.ocn.dat file)
Could you please tell me if this is possible and how?
Thank you very much! Clara