A Novel Alternating Impedance Transceiver Coil for 7T MRI

James F. Stack, Jr. ¹

Particle Swarm Optimization (PSO) and finite difference time domain (FDTD) simulations are employed to design a novel alternating impedance microstrip resonator (MSR) transceiver array for 7T MRI. The resulting design uses non-uniform spacing of impedance elements to control the B1+ field distribution and improve the peak B1+ value. Comparisons are shown between the optimized geometry, a traditional straight MSR and an alternating impedance MSR with uniformly spaced circular impedance elements.