A method of mapping eddy currents in magnetic resonance imaging apparatus of the type having gradient coils and RF coils, the method including the steps of (a) applying a pulse sequence to the apparatus in a first excitation stage, including the steps of applying a first test gradient of a first polarity by the gradient coils; subsequently applying a first RF pulse of the first polarity by the RF coils; subsequently applying at least one first imaging gradient by the gradient coils; (b) measuring a first output signal in the first stage in response to the RF excitation pulse and the gradients; (c) subsequently applying a pulse sequence to the apparatus in a second excitation stage, including the steps of subsequently applying a second test gradient of a second polarity opposite to the first polarity by the gradient coils; subsequently applying a second RF pulse of the second polarity; subsequently applying at least one second imaging gradient by the gradient coils; (d) measuring a second output signal in the second stage in response to the second RF excitation pulse and the second gradients; and (e) processing the first and second output signals to produce a map of the eddy currents.

Primary Examiner: Tokar; Michael J.
Attorney, Agent or Firm: Klauber & Jackson