Arrangement to correct eddy currents in a gradient coil

Details Arrangement to correct eddy currents in a gradient coil Arrangement to correct eddy currents in a gradient coil

2009-03-11

2010-12-14

Arana, Louis M (Department: 2831)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C324S318000

Reexamination Certificate

active

07852086

ABSTRACT:
In an arrangement to correct eddy currents in a gradient coil of a magnetic resonance apparatus, the gradient coil having a primary gradient sub-coil and a secondary gradient sub-coil connected in series with the primary gradient sub-coil, the secondary gradient sub-coil is coupled with the primary gradient sub-coil such that the same magnitude gradient current flows through both (but in different directions) in order to compensate for magnetic field distortions of the primary gradient sub-coil. The primary gradient sub-coil has a first impedance while the secondary gradient sub-coil has a second impedance. A tuning impedance is connected in parallel with at least one of the two impedances.

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