Floris H. P. van Velden Reina W. Kloet Bart N. M. van Berckel Carla F. M. Molthoff Adriaan A. Lammertsma Ronald Boellaard Gap Filling Strategies for 3-D-FBP Reconstructions of High-Resolution Research Tomograph Scans. 934-942 2008 27 IEEE Trans. Med. Imaging 7 http://dx.doi.org/10.1109/TMI.2008.922702 db/journals/tmi/tmi27.html#VeldenKBMLB08