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.
|Title of host publication||Joint Annual Meeting ISMRM-ESMRMB 2018|
|Place of Publication||Paris, France|
|Publication status||Published - 2018|
|Event||Joint Annual Meeting ISMRM-ESMRMB 2018 - Paris, France|
Duration: 16 Jun 2018 → 21 Jun 2018
|Conference||Joint Annual Meeting ISMRM-ESMRMB 2018|
|Period||16/06/18 → 21/06/18|