Is it possible to use fmriqa_generate on FSL preprocessed data? I've written out bxh files using readmr/createmrstruct/writemr but fmriqa_generate is failing when I try to run QA on these bxh files.
Yes, you should be able to run QA on any .bxh files. What errors are you getting?
I wrote a script called fslwrapbxh which takes paths on the command line and will wrap any .nii or .nii.gz file it finds under those paths (even in subdirectories) with a .bxh file, so you wouldn't have to do it in MATLAB, unless you are doing other preprocessing there...