Hi FreeSurfer,

I have analyzed my diffusion data using Tracula and combined the voxelwise diffusion measures across all subjects in one file (following the guidelines on the wiki).

In this text file, I saw that for some of these voxels some people have NAs, so their tract is most likely shorter.

I now would like to do t-tests for each voxel and plot these in freeview (as also suggested in the wiki).

Would you recommend to only take those voxels that have a value in each subject to keep the number of subjects consistent at each voxel ?

Look forward to your thoughts on this.

Best wishes

Heidi