Dear all,
I am analyzing a dataset which comprises of three groups studied over two time points. As there is no direct way to study between and within subject effects using GLM in FSL (its suggested to work on difference images), I would like to subtract timepoint1 and timepoint2 images for each participant in all groups and to perform my statistical analyses on thees difference images. For the same,
I ran TBSS script to register my images to standard space and before the postregistration to create all_FA.nii.gz and all_FA_skeletonised.nii.gz images, I subtracted time1_FA_to_target.nii.gz and time2_FA_to_target.nii.gz images to get a diff_FA_to_target.nii.gz image which I used later to run postreg step.
The script ran with no errors. I checked the output images and its blank. i cannot see anything.
So, my question is : How to get the difference FA images for randomise?
Any suggestions would be highly appreciated.
Thanks,
Deepika
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