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

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...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1995-11, Vol.31 (6), p.3536-3538
Main Authors: Petropoulos, L.S., Morich, M.A.
Format: Article
Language:English
Subjects:
Boring
Coils
Current density
Geometry
Lorentz covariance
Magnetic fields
Magnetic resonance
Magnetic resonance imaging
Magnetic shielding
Nuclear magnetic resonance
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Description
Summary: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.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.489561