I have an ROI (binary mask) that is perfectly bilateral and in ANALYZE format (img/hdr). I want to delete the left side and keep the right side to make a right hemispheric version of this ROI and vice-versa to create a left hemispheric version. I want to avoid MANUALLY deleting half of the ROI so as to avoid bias/error. Is there an easy way to do this in SPM? I specifically need to delete the half of the ROI that is in the left cerebral hemisphere and do the opposite for the right cerebral hemisphere. I am more than willing to convert to the binary mask into NIFTI (nii) format if that will make things easier.
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