Abstract #4392

Electric Dipole Based Metasurfaces Enhance Targeted RF Power Deposition of Thermal Magnetic Resonance at 7.0T, 9.4T and 10.5T

Nandita Saha^1,2, Rita Schmidt³, and Thoralf Niendorf^1,4

¹Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany, Berlin, Germany, ²The Charité – Universitätsmedizin, Berlin, Germany, ³Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel, 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, Berlin, Germany

Synopsis

Keywords: Interventional Devices, RF Arrays & Systems, Metamaterial surface This work proposes the feasibility of passive metasurface (MS) to enhance the RF power deposition for Thermal Magnetic Resonance based treatment of brain tumors. An 8 channel hybrid RF applicator combining dipole antenna and passive MS is designed and evaluated at 7.0 T (300 MHz), 9.4 T (400 MHz) and 10.5 T (450 MHz). MS with metal strips inside waterbolus was designed which generates expected resonant modes of the thermal intervention frequency. The result demonstrated use of passive metamaterial surface in RF applicator enhances the RF power deposition inside target volume for targeted RF heating of deep seated brain tumor.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.