Actively shielded planar gradient coil for pole plate magnets of

Details Actively shielded planar gradient coil for pole plate magnets of Actively shielded planar gradient coil for pole plate magnets of

1995-06-15

1996-12-03

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3320

Patent

active

055811876

ABSTRACT:
Each pole plate of a pole plate magnet of a magnetic resonance imaging apparatus has a sub-coil of the gradient coil allocated to it. Each sub-coil is composed of a primary and a secondary coil, respectively lying on one of two overlapping surfaces of a frustrum. The winding curve of each sub-coil changes multiply over a surface of the frustrum between the surfaces. The gradient coil can thus be optimized such that the required, maximum current densities become significantly lower compared to conventional, actively shielded arrangements.

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