Patent ID: 7852086

Claim:
An arrangement to reduce eddy currents in a gradient coil of a magnetic resonance apparatus, comprising: a magnetic resonance gradient coil comprising a primary gradient sub-coil and a secondary gradient sub-coil connected in series with the primary gradient sub-coil; said secondary gradient sub-coil being coupled with the primary gradient sub-coil to cause a gradient current to throw through both of said primary gradient sub-coil and said secondary gradient sub-coil, said gradient current having the same magnitude in each of said primary sub-coil and said secondary gradient sub-coil, and said gradient current flowing in a direction through said secondary gradient sub-coil that is opposite to a direction in which said gradient current flows in said primary gradient sub-coil; said primary gradient sub-coil comprising a first impedance and said secondary gradient sub-coil comprising a second impedance; and a tuning impedance connected in parallel with at least one of said first and second impedances.