Abstract #1090

16-Channel Hybrid Dipole+Loop RF Applicator for Thermal MR at 7.0 Tesla

Nandita Saha¹, Andre Kuehne^2,3, Thomas Wilhelm Eigentler^1,4, and Thoralf Niendorf^1,2,5

¹Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, ²MRI.TOOLS GmbH, Berlin, Germany, ³MT MedTech Engineering GmbH, Berlin, Germany, ⁴Technische Universität Berlin, Chair of Medical Engineering, Berlin, Germany, ⁵Experimental 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, Berlin, Germany

Synopsis

This work proposes the concept of a loop and SGBT dipole antenna array for diagnostic proton (¹H) imaging and thermal intervention at 7.0T MRI. Dipole antennas are the general choice for RF induced heating application as they can be made to operate over a broadband frequency range, have symmetric B1+ field and provide a central E-field distribution. Adding the inherently orthogonal and thus well-decoupled electromagnetic (EM) fields of loops to the dipoles provides additional degrees of freedom for RF shimming and thermal intervention not afforded by only using dipole antennas.

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