It is 3D I checked. Do you know if the two images need to be the same size in every direction to make it work? -- View this message in context: http://itk-insight-users.2283740.n2.nabble.com/3D-registration-with-level-set-motion-tp7590137p7590139.html Sent from the ITK Insight Users mailing list archive at Nabble.com.