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Novel gradient coil set with canceled net thrust force for nuclear magnetic resonance applications

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2 Author(s)
Petropoulos, Labros S. ; NMR Div., Picker Int. Inc., Highlands Hts., OH, USA ; Morich, M.A.

The interaction of the spatially varying main field components of a Magnetic Resonance Imaging (MRI) system with the currents of a gradient coil set generates axial and transverse Lorentz forces. In this paper, a novel technique for designing minimum inductance gradient coils with zero net axial and lateral Lorentz force is presented. Design examples are given for a short magnet geometry. A theoretical comparison between force-canceled and traditional gradient coils reveals a 270 to 2200 fold reduction for the Lorentz force, with up to 12% increase in stored energy

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Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 6 )