Susanne Ziegler1, Harald Braun1, Philipp Ritt2, 3, Jens U. Krause1, Carsten Hocke3, Harald H. Quick1
1Institute of Medical Physics, University of Erlangen-Nuremberg, Erlangen, Germany; 2Pattern Recognition Lab, University of Erlangen-Nuremberg, Erlangen, Germany; 3Clinic for Nuclear Medicine, University Hospital Erlangen, Erlangen, Germany
With the recent advent of PET/MR hybrid systems the need for simultaneous PET and MR phantom measurements arises. However, phantom fluids that are used in MRI are not necessarily applicable in PET, and vice versa. In this study different fluids were systematically evaluated in regard to their usability for phantom measurements in simultaneous PET/MR hybrid imaging. Crucial were the criteria: homogeneity of RF excitation in MRI, miscibility with FDG for PET imaging and compatibility with the plexiglas material of the phantom. Our results show that triethylene glycol represents a viable fluid for simultaneous PET and MR phantom measurements.
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