Abstract #5432

Higher is better: High peak and high average RF power transmit/receive switch for an integrated RF heating applicator operating at 297 MHz (7.0 Tesla)

Yiyi Ji¹, Werner Hoffmann², Michal Pham¹, Celal Oezerdem¹, Helmar Waiczies³, Thoralf Niendorf^1,3,4, and Lukas Winter¹

¹Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany, ²Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany, ³MRI.TOOLS GmbH, Berlin, Germany, ⁴Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine in the Helmholtz association

An integrated RF heating system utilizes the MR spin excitation frequency together with dedicated RF antennas for controlled RF heating and MR imaging in an integrated system. Operating the MR power amplifier for both RF heating and MR imaging applications simultaneously requires customized transmit/receive (Tx/Rx) switches that can handle both high peak powers and high average powers. In this work we designed, built and evaluated a high power Tx/Rx switch for handle MRI and RF heating requirements.

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