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 ).