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A finite element/Fourier expansion technique is presented for use in the design of a coil system for producing pulsed radial gradients for Magnetic Resonance Imaging (MRI). The technique employs the high magnetic Reynolds number approximation and a Fourier expansion technique to the three dimensional eddy current problem to allow the solution of a sequence of two dimensional axisymmetric problems. The details of the algorithm will be presented along with examples of its application to the design of a radial gradient system for a whole-body MRI system.
Date of Publication: Nov 1985