Invention Grant
- Patent Title: Method for measuring eddy current fields in a magnetic resonance device, magnetic resonance device, computer program and electronically readable data carrier
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Application No.: US16907598Application Date: 2020-06-22
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Publication No.: US11275143B2Publication Date: 2022-03-15
- Inventor: Michael Köhler
- Applicant: Siemens Healthcare GmbH
- Applicant Address: DE Erlangen
- Assignee: Siemens Healthcare GmbH
- Current Assignee: Siemens Healthcare GmbH
- Current Assignee Address: DE Erlangen
- Agency: Lempia Summerfield Katz LLC
- Priority: DE102019209079.6 20190624
- Main IPC: G01R33/565
- IPC: G01R33/565 ; G01R33/54

Abstract:
Systems and methods for measuring eddy current fields occurring as a result of gradient pulses in a magnetic resonance sequence at a point in time during the magnetic resonance sequence in relation to at least one direction of pulse effect. At least the parts of the magnetic resonance sequence comprising the gradient pulses relating to the at least one direction of pulse effect are performed as a preparation sequence up until the point in time followed directly by a measurement sequence in which first measurement data is recorded. The preparation sequence is played out again with the same, directly consecutive measurement sequence without the gradient pulses relating to the at least one direction of pulse effect or with gradient pulses having an inverted sign relating to the at least one direction of pulse effect. Second measurement data is recorded. Using a joint evaluation of the first and second measurement data at least one variable characterizing the eddy current field generated by the eddy currents of the gradient pulses in the at least one direction of pulse effect is determined.
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