Selaka Bandara Bulumulla1, Wolfgang Loew2,
Christopher J. Hardy1
1GE Global Research, Niskayuna, NY,
United States; 2GE Global Research, Munich, Germany
MRI
receiver chains that are carefully tuned and matched to operate at the Larmor
frequency are often prone to oscillations at other, nearby frequencies. These oscillations degrade image quality,
yet isolating and eliminating oscillations is a challenge in large arrays,
and significantly add to development cycle. In this work, we develop methods
to analyze and predict the stability of coil arrays given preamp data,
coil/balun/feedboard circuits and geometry. The method is used to predict the
stability of a coil array at the Larmor and nearby frequencies, for varying
conditions of coil loading and preamp termination, and compared with
experimental results.