A proposed hardware design aims to improve ECG signal quality during cardiac gated MRI by suppressing RF and gradient pulse interference.
Proposed ECG noise suppression in MRI is hypothesis-generating; leaves open clinical utility pending validation.
A simple design is proposed to suppress the noise pickup in the ECG leads from RF and gradient pulses during NMR imaging. The ECG signal is passed through a low-pass filter and a common-mode-rejection amplifier to reduce erroneous signal generated by the electrical ground loops. The output is gated through a CMOS switch to blank the preamplifier from the NMR during data acquisition.
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Anil N. Shetty (1988) studied this question.
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