When following the longitudinal qdec tutorial ( https://surfer.nmr.mgh.harvard.edu/fswiki/LongitudinalTwoStageModel), does using the generate Stats Data Tables option extract data for the difference between time point1 and 2, or something else?
Thank you.
Salil Soman, MD, MS
Hello,
I was wondering if it is better to keep the FA results from a DTI analysis in diffusion space for group analysis or if you should warp them into standard space as you would typically do with functional MRI data.
Emily
Hi Emily,
You will need to resample them in a common space before you do group analysis.
Lilla
On Tue, 1 Jul 2014, ebelleau@uwm.edu wrote:
Hello,
I was wondering if it is better to keep the FA results from a DTI analysis in diffusion space for group analysis or if you should warp them into standard space as you would typically do with functional MRI data.
Emily _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Hi Emily - Depends on what you're doing. If you're doing an ROI-based or tractography-based analysis, where you extract average FA in a part of white matter, there is no need to warp. If you're doing a voxel-based analysis, obviously all the subjects need to be in a common space to compare their FA values voxel-by-voxel.
a.y
On Tue, 1 Jul 2014, ebelleau@uwm.edu wrote:
Hello,
I was wondering if it is better to keep the FA results from a DTI analysis in diffusion space for group analysis or if you should warp them into standard space as you would typically do with functional MRI data.
Emily _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Anastasia Yendiki -
ebelleau＠uwm.edu -
Lilla Zollei -
Salil Soman