OC-0605: First in-beam MR scanner for image-guided proton therapy: beam alignment and magnetic field effects. (April 2018) - Schellhammer, S.; Karsch, L.; Smeets, J.; L'Abbate, C.; Henrotin, S.; Van der Kraaij, E.; Lühr, A.; Quets, S.; Pawelke, J.; Hoffmann, A.