CBCT‐based navigation system for open liver surgery: Accurate guidance toward mobile and deformable targets with a semi‐rigid organ approximation and electromagnetic tracking of the liver. - Ivashchenko, Oleksandra V.; Kuhlmann, Koert F.D.; Veen, Ruben; Pouw, Bas; Kok, Niels F. M.; Hoetjes, Nikie J.; Smit, Jasper N.; Klompenhouwer, Elisabeth G.; Nijkamp, Jasper; Ruers, Theodoor J. M. (Medical Physics, 2021)