We propose a general analysis based on minimization of modal reflection coefficients, providing a simple tool for quantifying the performance of transmit array (TxArray) coils in terms of power efficiency. We investigate the performance of various dual-row birdcage TxArrays, with an additional degree of freedom to correct B1+-field inhomogeneities by adding RF shimming ability in the longitudinal-direction, together with simulations and experiments. The chosen structure of the TxArray allows the coil to act like degenerate birdcage coils. We demonstrate when TxArrays are properly designed, in some critical excitation modes such as circularly-polarized (CP) mode, the total reflection becomes negligibly small.
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