Abstract #0406

Extending the sensitivity of a transmit/receive radiofrequency coil with dielectric materials at 7 T

Manushka V. Vaidya ¹ , Daniel K. Sodickson ¹ , Christopher M. Collins ¹ , and Riccardo Lattanzi ¹

¹ Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States

High-permittivity material (HPM) can be used to shape and/or enhance the magnetic field associated with a radiofrequency (RF) coil. We showed in simulations that placing discs of HPM beneath and beside an RF coil can extend its sensitivity, improving transmit efficiency and SNR as compared to a single surface coil covering the same field of view. The results are comparable to the case of a surface array of three loops with the same total dimensions. Our results suggest that HPMs could be used to improve coil performance when the number of transmit or receive channels is limited.

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