Dear Experts!

I would like to understand better the role of the mean_FA_skeletton_mask.nii.gz

I was thinking that this mask actually defines the region where the randomise statistics will take place.

In order to have significant results for covariates (which did not come out significant for an all_skeleton analysis), I tried to take a different mask, a kind of restricted skeleton, i.e. the result of the group comparison, thresholded and binarised.

Hower the randomise program could not cope with this mask and blocked during the second t-test.

Is there a principal problem in my way of thinking?

How else would I restrict the ROI?

Thanks for all help!
Markus


--
Dr. med. Markus Gschwind, M.D.
Laboratory for Neurology and Imaging of Cognition
Dept of Neurosciences
University Medical Center (CMU)
1 Michel-Servet - 1211 GENEVA - CH

Tel 0041 (0) 22 379 5324
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