Correlation of perfusion MRI and 18F-FDG PET imaging biomarkers for monitoring regorafenib therapy in experimental colon carcinomas with immunohistochemical validation. oleh Ralf S Eschbach, Wolfgang P Fendler, Philipp M Kazmierczak, Marcus Hacker, Axel Rominger, Janette Carlsen, Heidrun Hirner-Eppeneder, Jessica Schuster, Matthias Moser, Lukas Havla, Moritz J Schneider, Michael Ingrisch, Lukas Spaeth, Maximilian F Reiser, Konstantin Nikolaou, Clemens C Cyran