Dear VBM experts
I am running a VBM of 2 groups of patients, AD versus controls each.
First I did the entire pipeline only for one group (one scanner). Nice results
Then I did the pre-processing pipeline again, including both groups. For the actual randomize, I however use only the identical participants of group 1.
Completely different results !?
Then I checked the pre-processed images again, and indeed, the identical image of the same patient is pre-processed in a very different way depending on the fact whether I do the pre-processing of only 1 or 2 groups
Is this possible? Or am I wrong ???
Thanks
Sven
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