To achieve frequency encoding using Bloch-Siegert shift, the off-resonance pulse and signal reception would need to take place simultaneously. In this work we describe two methods to get rid of applied off-resonance signal from the receive signal. Both Tx cancelling and RF filter methods can be integrated into the RF chain to reduce the power of the off-resonance signal. It was found that using an RF filter was more effective for both blocking off-resonance signal and keeping receive signal. It was also demonstrated that the combination of two methods is promising in terms of reducing the off-resonance signal.
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