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.
