Dear FSL Experts,
I´m calculating two TBSS with different samples (neurodegenerative disease and healthy control) and comparing their mean FA and their FA from different ROIs. The logical result is to find FA from neurodegenerative group<Healthy group
The results that I find are:
-FA from ROIs: higher in healthy control group
-mean FA: higher in neurodegenerative disease group
The TBSS is calculated:
1. tbss_1_preproc *.nii.gz
2. tbss_2_reg –T
3. tbss_3_postreg –S
4. Tbss_4_prestats 0.2
The mean FA is calculated with:
fslmeants : “fslmeants -i all_FA_skeletonised.nii.gz -mmean_FA_skeleton.nii.gz -o FAmedia”
I have checked the brain mask and the DTIFIT from all subjects and the images are ok.
Something I´m doing wrong, because results are contradictory. Can you help me?
Is there any other way for calculating the mean FA?
Thanks in advance,
María.
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