1. A radiofrequency (RF) coil assembly configured for use in a magnetic resonance system, including: a preamplifier; a transmit radiofrequency coil; a receive radiofrequency coil; and a memory resistive element which retains a selected resistive state after a control signal is removed, wherein the memory resistive element functions as a switch and is connected between the receive radiofrequency coil and the pre-amplifier of the magnetic resonance system.