On 9/11/13 11:57 PM, Chung, Yoonho wrote:

Dear all,

Is there a way to visualize vertex wise t-values (t-statistics), instead of p-values, on a vertex map when you are doing group analyses? I successfully generated the p-maps using mri_glfmfit, but I am wondering if vertex-wise maps that represent t-values can be also generated and visualized using tksurfer.

The t-value is not automatically saved, but the F-value is. To convert to a t = sqrt(F)*sign(gamma) where gamma is gamm.mgh

Another question I have is that is there a way to generate just average thickness maps within the same group? For example, if want to look at a vertex map that just shows mean thickness of all my controls, how would you generate that file that can be fed into tksurfer?

you can run mris_preproc with just that group (smooth if you want), then run mri_concat output-of-preproc.mgh --mean --o mean.output-of-preproc.mgh doug

Thanks in advance! Yoon _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer