B1+ inhomogeneities in the temporal lobes of the brain are common while using a birdcage coil at 7T. Different passive RF shimming approaches have already targeted this problem, at the cost of decreasing the B1+ field in other important areas or being uncomfortable to the patient. Here, we present a new approach based on two resonant fractal metasurfaces printed on ultra-thin flexible substrate. We show that these resonators improve the B1+ field amplitude simultaneously in each temporal lobe without affecting the B1+ field amplitude in other parts of the brain.
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.
Keywords