Hi FSL developers,
I would appreciate it if you could help me out on this, so that I know I am interpreting my data correctly!
If I ran fslmaths <pre> -sub <post> <output>, did FSL construct images pre-post or post-pre?
if I want to extract the values out ROIs with fslmeants from the DR2 merged files (to make plots in SPSS), what do these z-values reflect? Is this connectivity during rest of this ROI with the rest of the network (e.g. DMN)? Or should I see this as activation within this region?
Finally, I also want to correct for grey matter atrophy, so I created a voxelwise EV via feat_gm_prepare. Do I have to demean this? And yes, how should I do this, since this is a 4D file?
Thank you very much!!
Best wishes
Heidi
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Dr. Heidi Jacobs
Postdoc researcher
Faculty of Health, Medicine and Life Sciences
School for Mental Health and Neurosciences
Division Cognitive Neuropsychiatry and Clinical Neurosciences
Alzheimer Center Limburg
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www.maastrichtuniversity.nl
www.heidijacobs.nl
Dr. Tanslaan 12, 6229 ET Maastricht
P.O. Box 616, 6200 MD Maastricht, The Netherlands
T +31 43 38 84 090 F +31 43 38 84 092
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