Sorry if this is a very simple question, I am an MRtrix newbie!
I have ex-vivo macaque data that I’d like to run ACT on. I was trying to use 5ttgen fsl to get the required file, but the FIRST command is not optimized for macaque data and the function failed while trying to segment out subcortical structures.
I was able to use FAST to get simple GM-WM-CSF segmentations in NIFTI format, which I think will suffice for our current needs. How do I convert these segmentations into 5TT format?