Abstract #3827

Ultra-Wideband Self-Grounded Bow-Tie Antenna Building Block for Thermal Intervention, Diagnostic MRI and MR Thermometry at 7.0 Tesla

Thomas Wilhelm Eigentler¹, Lukas Winter², Haopeng Han¹, Eva Oberacker¹, Andre Kuehne³, Laura Boehmert¹, Hana Dobsicek Trefna⁴, and Thoralf Niendorf^1,3,5

¹Berlin Ultrahigh Field Facility, Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, ²Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany, ³MRI.TOOLS GmbH, Berlin, Germany, ⁴Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden, ⁵Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max-Delbrück Center for Molecular Medicine, Berlin, Germany

A compact resonator antenna for broadband thermal intervention, diagnostic proton (¹H) and fluorine (¹⁹F) imaging and MR-Thermometry was developed for operating at 7.0T MRI. The antenna is based on the concept of a self-grounded bow-tie (SGBT) antenna to enable thermal intervention frequencies ranging from 250MHz to 516MHz. The self-grounded bow-tie resonator antenna is smaller and lighter compared to previous dipole-antenna designs, enabling a high-density multi-channel array. The proposed antenna is demonstrated to be suitable for diagnostic imaging, thermal intervention, and MR thermometry.

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