Suppression of radiofrequency interference in cardiac gated MRI: a simple design.
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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Eugene P. Pendergrass Diagnostic Radiology Research Laboratories, Department of Radiology, University of Pennsylvania, Philadelphia 19104-6086.
D004562:Electrocardiography / Q000295:instrumentation; D006321:Heart / Q000503:physiopathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation