Dear FreeSurfers,
We are running a FS-FAST group analysis where the individual subjects are morphed to an average brain via spherical surface. The output of that analysis (sig statistical maps, left hemisphere) is saved in $STUDY_DIR/<groupanalysisdir>/bold/<analysisname>/<smoothingdir>/<contrastname>/sig-lh_XXX.bfloat,
Question 1: In the above, XXX is usually the slice number. However we have 25 slices in the input data, and our <contrastname> folder contains only bfloat numbers 000-006. I guess morphing the individual data to a sperical surface for group analysis changes the original slice structure, and hence the numbering. I guess we have seven "slices" because in the command func2sph-sess we defined -icoorder 7 (icosahedron order). Correct?
Question 2: We use the above sig-lh_XXX.bfloat files as input to a custom matlab analysis. Remember we have XXX=000-006. What should the output of the matlab analysis look like so that rendering it onto a FreeSurfer surface will work? Is there any documentation related to this?
Thanks!
-Tommi
--- Tommi Raij, M.D., Ph.D. Bldg 149, 13th St Charlestown, MA 02129 U.S.A.
raij@nmr.mgh.harvard.edu