Hi,
I am wondering what is going on "under the hood" when one makes a choice under
the Design tab in the Measure (Dependant Variable) box for Measure. For example
if one chooses "Volume" instead of Thickness, what exactly is being used as
volume? Where does the information on volume come from?
Hello,
I have concern about a possible left-right swap issue in my analysis using QDEC.
I have compared 2 groups for parcellated cortical volumes using lh.aparc.volume.stats and rh.aparc.volume.stats files imported by QDEC from each subject. This gives differing significant regions for each hemi
Hi Micheal,
Thanks. Looks like I will have to dump all my results done with mc-z!
Unfortunately the Freesurfer Wiki is mute on the use of permutation, unless there is some tutorial I haven't found.
How many permutations should one run?
Any other helpful hints?
Cheers...J
On Mon Oct 11 9:05
Hi Experts,
Which option is best to use: mc-z or perm?
I have read that perm gives more accurate results than mc-z, as it uses the
actual data rather than fake data to estimate the null distribution.
When I use perm, I get no significant clusters.
When I use mc-z, almost all clusters are signifi
Hi Experts,
I have experienced a possible problem with sided-ness within Freesurfer.
I have 2 groups which have been processed through the pipeline without error.
I have used the lh.aparc and rh.aparc files to extract parcellated cortex
volumes, and analysed the mean differences with SPSS.
>Fro
My nii files look straight in FSLView, but after converting them to mgz with mri_convert, they are tilted a bit to one side and slightly forwards when viewed with tkmedit.
Have I done something wrong, or omitted a necessary command?
Thx
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Freesurfe
