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Abstract #0833

Hybrid MRI/RF-Heating at 7.0 Tesla and 11.7 Tesla: Electro-Magnetic Field Simulations, Temperature Simulations/Measurements, Dipole Antenna Design and Heating Experiments

Lukas Winter1, Tessa van de Lindt1, Celal zerdem1, Werner Hoffmann2, Davide Santoro1, Alexander Mller1, Andreas Graessl1, Reiner Seemann2, Jaroslav Marek1, Thoralf Niendorf1, 3

1Berlin Ultrahigh Field Faciltiy (B.U.F.F.), Max-Delbrck Center for Molecular Medicine, Berlin, Germany; 2Metrology in Medicine, Physikalisch Technische Bundesanstalt, Berlin, Germany; 3Experimental and Clinical Research Center (ECRC), a joint cooperation between Charit Medical Faculty and Max-Delbrck Center for Molecular Medicine, Berlin, Germany

The concept of combining dedicated MR hardware for MR imaging, MR thermometry and targeted RF heating at 7.0T has been demonstrated recently. This study examines controlled RF induced heating at even higher frequencies (11.7T), to benefit from the sharpening and focusing abilities of a RF wavelength reduction. The presented antenna configurations both for 7.0T and 11.7T are suitable for MR imaging, MRTh and targeted RF-Heating. Temperature simulations in voxel models show, that a controlled generation of a hotspot in the human brain is feasible and the hotspot dimensions can be further reduced with an increase in frequency.