You can run mri_surfcluster using the sig.mgh as the input and specifying a --minarea and --thmin .001. --minarea takes a surface area in mm2, not number of vertices, so you'll have to compute what the approx area is of 150 vertices. Include a --ocn output and --sum sumfile, then use mri_segstats with --seg ocn.mgh --excludeid 0 --i y.mgh --avgwf y.sum.dat
The output y.sum.dat will be a matrix of number of subjects by number of clusters. Look in the sumfile for the cluster identity
On 02/01/2017 11:41 AM, Clara Kühn wrote:
Dear FreeSurfer experts,
I did a group analysis in QDEC for the symmetric percent change from pre to post and have a couple of clusters that don't survive the Monte Carlo correction. I want to extract the values for each time point per subject for those clusters that are bigger than 150 vertices to look at individual trends. How could I achieve this?
Thank you for your help. Clara
Clara Kühn, Phd Student
Max-Planck-Institute for Human Cognitive and Brain Science Department of Neuropsychology Stephanstrasse 1A 04103 Leipzig, Germany
Phone: +49 341 - 9940 2271 Fax: +49 341 - 9940 2260 Web: www.cbs.mpg.de E-Mail: ckuehn@cbs.mpg.de
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