Non-rigid image registration of 4D-MRI data for improved delineation of moving tumors. - Stefan Weick; Kathrin Breuer; Anne Richter; Florian Exner; Serge-Peer Ströhle; Paul Lutyj; Jörg Tamihardja; Simon Veldhoen; Michael Flentje; Bülent Polat (BMC Medical Imaging, 2020)