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