A Four-Channel Transceive Phased-Array Helmet Coil for 3 T
Driesel W, Wetzel T, Mildner T, Wiggins C, Mller H
Max Planck Institute for Human Cognitive and Brain Sciences
We describe a novel four-channel transceiver array helmet coil based on strip-line technology for all MRI and MRS applications of the human brain at 3 T. Due to the symmetry of the assembly, a high degree of circularly polarized RF is obtained within the entire brain in the transmit mode. Investigations of the RF distribution indicated a birdcage-like B1 profile in axial slices and a moderate gradient along the z-axis. The design may be exploited for parallel imaging on scanners where no body coil is available.