Permittivity Determination Via Phantom and in Vivo B1 Mapping

Ulrich Katscher¹, Philipp Karkowski¹, Christian Findeklee¹, Tobias Voigt²

Tissue permittivity might serve as diagnostic parameter, e.g., for oncology. However, the diagnostic use of the permittivity is significantly hampered by the lack of suitable methods to determine the permittivity in vivo. A possible approach for the determination of permittivity in vivo is given by analyzing the B1 map in the framework of standard MRI, called "Electric Properties Tomography" (EPT). Hitherto, studies were focussed on the ability of EPT to reconstruct the electric conductivity and local SAR. This study demonstrates the ability of EPT to determine the permittivity via numerous phantom and in vivo experiments.