Susanne Ziegler1, Harald Braun1, Philipp Ritt2, 3, Carsten Hocke2, Torsten Kuwert2, Harald H. Quick1
1Institute of Medical Physics, University of Erlangen-Nuremberg, Erlangen, Germany; 2Clinic for Nuclear Medicine, University Hospital Erlangen, Erlangen, Germany; 3Pattern Recognition Lab, University of Erlangen-Nuremberg, Erlangen, Germany
Simultaneous PET/MR hybrid imaging of fluid-filled phantoms can be problematic. Pure water can cause inhomogeneous RF excitation when imaging large sized phantoms at high field strength. Oil, as alternative fluid, does not mix well with the standard PET radiotracer 18F-FDG. In this study three different approaches of fluid and radiotracer selection were considered and systematically evaluated with respect to their usability for simultaneous PET/MR phantom imaging. Alternative fluids as a compromise for both imaging modalities and workarounds for improving the use of standard fluids are presented. Additionally an alternative radiotracer to 18F-FDG is proposed and evaluated in PET/MR measurements.