Abstract #2817

Three Approaches to Phantom Fluid Selection for Simultaneous PET/MR Hybrid Imaging

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.