Magnetic Resonance Imaging (MRI) guided Microwave Ablation (MWA) allows for real-time therapy monitoring with MRI-thermometry. The MWA generator emits Radio Frequency (RF) interference, which can limit the accuracy of therapy monitoring. The image quality is enhanced by Floating Cable Traps (FCTs) that are used to attenuate common mode currents on supply lines between a MWA generator, and its ablation applicator. The effect of an FCT on the Signal to Noise Ratio (SNR), and changes in the MRI spectrum are discussed in this paper. The application of FCT can bring significant improvements in both, the MRI spectrum and the SNR.Floating Cable Traps are user-friendly. FCT enable coaxial cables to reduce interferences emitted in MRI guided interventions. It is used to selectively attenuate frequencies in the MRI's range. This can increase the image's Signal to Noise Ratio.