Hi. Sorry to repost, but this was not answered.
I have read through the list but still have a question about FSLVBM and setting up a proper model. My understanding is that the gray matter data are modulated by the Jacobian, but that the recommendation is that a covariate for total intracranial volume is not necessary in the analysis. I'm not sure I understand why. Does the Jacobian include both affine and non-linear aspects of the normalization? If so wouldn't modulating by the affine scaling mean that size differences would not be accounted for between subjects any more?
A second question is whether FSLVBM can be used on white matter? If so would it just be a matter of changing the Template specification at the top of the fslvbm_2_template script, and then making sure files were named appropriately through, e.g., WM for GM in file names?
thanks
Darren
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