Hi Martin, When I used the long_mris_slopes command for the thickness, the average thickness calculated in FreeSurfer was pretty similar to averaging the values in FreeSurfer. Does this command only work thickness measures and not for volume or area? Thanks!
-Shannon
On Wed, Sep 26, 2012 at 2:49 PM, Martin Reuter mreuter@nmr.mgh.harvard.eduwrote:
Hi Shannon
You probably mean average thickness. My scripts compute the temporal average from the linear fit (at mid time), which can be differed from simply averaging values. Best Martin
Shannon Kogachi skogachi@gmail.com wrote:
Hi, I had a question about how the temporal average is calculated for subjects with multiple timepoints. I used the long_mris_slopes command on a longitudinal set of data. However, when I compared the average volumes calculated through this command to the average volumes calculated in excel after extracting the same vertices at the individual timepoints, these values did not match up. The average volumes calculated through long_mris_slopes were smaller. Please let me know if there is a way to explain this discrepancy. Thank you!
-Shannon K.
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