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Suppression of radiofrequency interference in cardiac gated MRI: A simple design
Author(s) -
Shetty Anil N.
Publication year - 1988
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910080110
Subject(s) - preamplifier , signal (programming language) , amplifier , interference (communication) , filter (signal processing) , pickup , simple (philosophy) , noise (video) , electromagnetic interference , radio frequency , nuclear magnetic resonance , computer science , cmos , blank , physics , electronic engineering , materials science , telecommunications , optoelectronics , engineering , artificial intelligence , channel (broadcasting) , computer vision , philosophy , epistemology , image (mathematics) , programming language , composite material
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. © 1988 Academic Press, Inc.