I used CAT12 on longitudinal pediatric data (pre & post) to get WM, GM and surface data. The WM & GM segmentation were in .nii so I could just use FSL maths to subtract post-pre before using a multiple regression analysis on the delta images. I also used FSL to threshold.
I tried to use the surface calculator (subject-wise) in CAT12. I renamed my files so they would conform (eg. lh.text.resampled.D14_001.gii & lh.text.resampled.D14_001_2.gii); separated each subject and entered the expression s2-s1. When I run the batch it just simply says 'output.... failed'. Does anyone know what I am doing wrong? Or know of an alternative way to derive delta images from .gii files? (and threshold)
Thanks,
Nick
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