Hi Simon

they are originally mm, but I believe we z-score normalize them so that the sulc file is 0 mean and unit variance.

cheers Bruce On Wed, 21 Oct 2015, Simon Vandekar wrote:

Dear Freesurfer experts,

I am reading the manuscript "Cortical Surface-Based Analysis II: Inflation, Flattening, and a Surface-Based Coordinate System" by Fischl, Sereno, and Dale (1999) where the estimation of sulcal depth is described on page 199, however from the description I am still unsure of the exact units of sulcal depth. Are the units for sulcal depth in mm or are they in arbitrary units?

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