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Suppression of radiofrequency interference in cardiac gated MRI: a simple design
1Eugene P. Pendergrass Diagnostic Radiology Research Laboratories, Department of Radiology, University of Pennsylvania, Philadelphia 19104-6086.
Magnetic Resonance in Medicine
|September 1, 1988
Abstract:
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.