Hi Alexander - These measures (both averages and along-the-tract values)
are extracted in each subject's native space, so inter-subject
registration is not an issue in the difference that you found. I suspect
it is because the along-the-tract measures are sampled at a certain number
of cross-
Anastasia, thank you for the prompt response. It is helpful.
I’ve already examined pathstats.byvoxel.txt files combining them with
“-stat” command. First, I compared every voxel along the particular tract.
Then I split this tract by 3 equal parts and tried to calculate
between-group difference at
Hi Alexander - When you average over a larger region, you are potentially
reducing noise but you may also potentially wash out an effect that is
very localized by including more voxels where the effect is not present.
That's the difference between the two measures, so they are at different
po
Dear Anastasia and Freesurfer team,
I used TRACULA to get FA values for two groups: patients and controls.
After that, I ran between group comparison and got circa >0.05 p-values for
FA _Avg_Weight values BUT circa 0.001-0.005 p-values for FA_Avg_Center for
the same tract.
Then I ran correlation
