Birdcage coils used in MR imaging cause magnetic field strengths able to disturb electronic devices in the proximity to a MR system. Based on the principle of destructive superposition a configuration consisting of a main birdcage with additionally attached auxiliary birdcages is used to generate a field to reduce the magnetic field strength in the proximity of a MR system while maintaining the imaging quality. By electromagnetic simulations a reduction of up to 60 dB could be shown without drawbacks for the imaging performance if a distance of at least 25 cm between neighboring birdcages is retained.
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