RF traps for radio frequency coils used in MRI

A radio frequency coil includes an operative radio frequency circuit (100, 100') and a trap radio frequency circuit (110, 110'). The operative radio frequency circuit is tuned to a magnetic resonance frequency and is spatially configured to at least one of generate magnetic resonance in or receive magnetic resonance from a spatial region of interest. The trap radio frequency circuit is tuned to block a selected frequency and is disposed with the operative radio frequency circuit. The trap radio frequency circuit includes at least a generally linear transmission line (120) having a first end (122, 122') at which the operative radio frequency circuit and the trap radio frequency circuit are coupled together and a second end (124) at which the generally linear transmission line is terminated with a termination impedance (136).