Saiseikai Utsunomiya Hospital 1 article published in JoVE Bioengineering Four-Dimensional CT Analysis Using Sequential 3D-3D Registration Satoshi Oki1,2, Kazuya Kaneda1, Yoshitake Yamada3, Minoru Yamada3, Yutaro Morishige1, Kengo Harato1, Noboru Matsumura1, Takeo Nagura1, Masahiro Jinzaki3 1Department of Orthopedic Surgery, Keio University School of Medicine, 2Department of Orthopedic Surgery, Saiseikai Utsunomiya Hospital, 3Department of Radiology, Keio University School of Medicine We analyzed joint kinematics from four-dimensional computed tomography data. The sequential 3D-3D registration method semiautomatically provides the kinematics of the moving bone with respect to the subject bone from four-dimensional computed tomography data.