Finds the standard data directory for FSL and pastes together the string for an MNI template image
Resolution (in mm) of the brain image (isotropic)
Should the brain be returned (default) or the T1 with the skull
Should the linearized MNI template be used
should the mask be given? Generally, only MNI152_T1_1mm_brain_mask exists.
Character path of filename, warning if that file does not exist