Hi Wei

The DKT and aparc are estimates from folding patterns, based on different neuroanatomist’s conventions. The exvivo ones are based on direct observation of highres ex vivo images where we can see the borders and likely to be more accurate in my opinion. The first one is all vertices that might possibly be in EC, the second is thresholded so that the EC label has the same area as the average of the ex vivo labels.

Cheers Bruce

From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu On Behalf Of Wei Shao Sent: Thursday, October 28, 2021 12:41 AM To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] same ROI with different stats

External Email - Use Caution Hi, Freesurfer exports

I'm wondering what is the difference in the stat folder when it comes to the same ROI.

For example, I have found the entorhinal from 4 different stats files and the values are slightly different.

lh.aparc.DKTatlas.stats entorhinal 665 393 1528 3.174 0.788 0.085 0.021 5 0.5 lh.aparc.pial.stats entorhinal 848 799 1906 3.159 0.787 0.199 0.068 16 3.1 lh.BA_exvivo.stats entorhinal_exvivo 570 346 1394 3.000 1.015 0.083 0.023 5 0.4 lh.BA_exvivo.thresh.stats entorhinal_exvivo 344 205 918 3.450 0.520 0.057 0.010 1 0.1

I‘m really appreciate it if you can provide me some instructions about these 4

Best, Wei