Visual validation of spatial registration results was accomplished through side by side visual inspection using the SPM2 orthogonal viewer. Orthogonal views are (a) coronal (b) sagittal and (c) transverse. On the left side are the othrogonal views for subject 16. On the right side are the three orthogonal views for the template, subject 17. The brain is shown as the area of highest intensity in views (b) and (c).