Hi Kaley

no, it is inevitable that there will be differences as we are always trying to improve the algorithms.

cheers Bruce On Tue, 23 Jan 2018, KALEY E ELLIS wrote:

Hello FreeSurfer Developers,

I am extracting ROIs of cross-sectional data using FreeSurfer v6.0.  We looked at this data preliminarily about 2 years ago using FreeSurfer v5.3. It looks like there are slight differences in the values of the same subject (see below). Do you know the reason for this difference and whether there is something I should do differently?

Subject 2000_1, lh_G_and_S_frontomargin_thickness:

v5.3 = 2.416

v6.0 = 2.482

command used:

aparcstats2table --hemi lh --subjects $subjectlist --skip --delimiter comma --meas thickness --parc aparc.a2009s --tablefile /PATH/lh_aparc-destrieux-thickness-table.csv

Thank you for your time!

Kaley Ellis

Associate Research Specialist Center for Healthy Minds Waisman Center for Brain Imaging and Behavior University of Wisconsin-Madison