Meeting Banner
Abstract #1531

Transient Eddy Current Simulation of a Uni-Planar Gradient Set

Silke Maria Lechner1,2, Timothy J. Hollis3, Hans-Joachim Bungartz2, Bruce C. Amm4, Guido Kudielka1, Mika W. Vogel1

1GE Global Research Europe, Garching, Germany; 2Technische Universitt Mnchen, Garching, Germany; 3GE Medical Systems, Oxford, United Kingdom; 4GE Global Research, Niskayuna, NY, United States

The use of computer assisted magnetic resonance imaging simulation strongly supports the design of new gradient hardware as it allows the prediction of gradient non-linearity or other distortion sources on image quality. This work utilizes finite element method simulations of a uni-planar gradient set to analyze and visualize the created transient eddy currents. Therefore, typical eddy current origins, such as thermal shield and cryostat, but also the included cooling tubes of the planar gradient set are investigated. Eddy current amplitudes and timing constants are presented for aluminum, stainless steel and copper, where interestingly, the eddy currents induced in copper cooling tubes are as strong as the induced currents in the warm bore.