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Abstract #1202

A new single channel method for electromagnetic interference reduction on a 50 mT permanent magnet system

Javad Parsa1,2, Thomas O'Reilly2, and Andrew Webb2
1Percuros B.V., Leiden, Netherlands, 2Leiden University Medical Center, Leiden, Netherlands


External electromagnetic interference (EMI) in unshielded low field and portable MRI systems can swamp the signal, and various multi-detector methods have been developed to minimize it. A new EMI cancellation method designed for a single-channel receiver-system has been implemented on a 50 mT system by using the MR-inactive channel of a birdcage coil and a 180o power hybrid. This method results in up to a 97% reduction in the standard deviation of external EMI.

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