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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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