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.