Dear All
I have 2 specific question regarding transfer of SPM-results to Freesurfer and vice versa: 1.) I transfer SPM result images (con_00x images) to freeSurfer for illustration purposes. Conversion of the images using mri_vol2surf works nicely. Now I am just not sure on how to interpret the overlay in tksurfer regarding significance thresholds. Can someone advice me on how to "translate" the Min and Max-values in the "configure overlay display" tool into actual p-values, when using SPM-generated con-images ? 2.) The second question is probably related to 1.) Can I perform a direct correlation analysis between FreeSurfer-derived results (sig.mgh) and SPM-generated results (con_00x.img), i.e. are the values in the two image types comparable or do they have to be normalized to some common ground before actual correlation analysis can be carried out ?
Thanks for any advice !
Alex
Alexander Drzezga, MD Visiting Assistant Professor Harvard Medical School Massachusetts General Hospital/ Athinoula A. Martinos Center for Biomedical Imaging Building 149 13th Street, Room 2301 Charlestown, Massachusetts 02129 Tel: 617 378-1071 Fax: 617 726-7422 email:adrzezga@nmr.mgh.harvard.edu