Abstract #0023

New ferroelectric ceramics for transmit efficiency enhancement at 1.5 Tesla

Irena Zivkovic¹, Alexey Slobozhanyuk², Elizaveta Nenasheva³, and Andrew Webb¹

¹Radiology Department, C.J. Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands, ²Department of Nanophotonics and Metamaterials, ITMO University, Saint Petersburg, Russian Federation, ³Giricond Research Institute, Ceramics Co., Saint Petersburg, Russian Federation

The presence of medical implants often results in MR scans with low SAR being prescribed, which reduces the diagnostic quality of the images. This work shows that one can achieve an increase in local transmit efficiency and a corresponding decrease in SAR at 1.5 Tesla using new ferroelectric materials (based on BaTiO₃ with ZrO₂ and CeO₂-additives) with relative permittivities higher than 4500. Simulations and phantom/in vivo experiments show an increased local transmit efficiency of ~50% from the body transmit coil, with a corresponding increase in SNR for a given value of SAR.

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