Reconfigurable Coaxial Receive Dipoles for Dynamic Parallel Imaging of Human Brain at 9.4T

Recently developed dynamic parallel imaging, i.e. rapid modulation of element's sensitivities during acquisition, greatly improved the performance of the method. In this work, sensitivity profiles of dipole elements were electronically reconfigured by varying impedances of lumped element circuits connected in series with the dipoles. This required a large number of DC wires directly connected to the dipoles. In the present work, we developed, constructed, and evaluated a dynamically reconfigurable 8-element coaxial dipole array for brain imaging at 9.4T. Our design eliminates the DC wires directly connected to the dipoles and, hence, substantially simplifies further increasing the number of receive channels.