get_mni_fiducials(subject, subjects_dir=None, verbose=None)¶
Estimate fiducials for a subject.
List of estimated fiducials (each point in a dict)
This takes the
fsaverage-fiducials.fiffile included with MNE—which contain the LPA, nasion, and RPA for the
fsaveragesubject—and transforms them to the given FreeSurfer subject’s MRI space. The MRI of
fsaverageis already in MNI Talairach space, so applying the inverse of the given subject’s MNI Talairach affine transformation (
$SUBJECTS_DIR/$SUBJECT/mri/transforms/talairach.xfm) is used to estimate the subject’s fiducial locations.
For more details about the coordinate systems and transformations involved, see https://surfer.nmr.mgh.harvard.edu/fswiki/CoordinateSystems and Source alignment and coordinate frames.