Calculation of stimulation values in magnetic resonance tomography
AssigneeSiemens Healthcare GmbH
InventorsVolker Schnetter, Daniel Nico Splitthoff
Life of this patent
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Abstract
The disclosure relates to simulating an electrical stimulation during an examination of an examination object, in which the examination object is examined in a MR system to create a MR image using an imaging sequence, where a time characteristic of at least one magnetic field gradient used during the imaging sequence is determined, a time derivative of the time characteristic of the at least one magnetic field gradient is determined, and change time points at which the value of the time derivative changes are determined. The simulation of the electrical stimulation for the imaging sequence is performed, wherein the simulation is restricted to the determined change time points.
Claims17
A method for simulating an electrical stimulation during an examination of an examination object, in which the examination object is examined in a magnetic resonance (MR) system to create a MR image using an imaging sequence, the method comprising:
- determining, by a computing unit, a time characteristic of at least one magnetic field gradient used during the imaging sequence;
- determining, by the computing unit, a time derivative of the time characteristic of the at least one magnetic field gradient;
- determining, by the computing unit, change time points at which a value of the time derivative of the time characteristic of the at least one magnetic field gradient changes;
- and
- determining, by the computing unit, the simulation of the electrical stimulation for the imaging sequence, wherein the simulation is restricted to only the determined change time points.
A magnetic resonance (MR) system configured to simulate an electrical stimulation during an examination of an examination object and create a MR image using an imaging sequence, the magnetic resonance system comprising:
- a computing unit configured to:
- determine a time characteristic of at least one magnetic field gradient used during the imaging sequence;
- determine a time derivative of the time characteristic of the at least one magnetic field gradient;
- determine change time points at which a value of the time derivative of the time characteristic of the at least one magnetic field gradient changes;
- and
- perform the simulation of the electrical stimulation for the imaging sequence, wherein the simulation is restricted to only the determined change time points.
A non-transitory computer program configured to be loaded directly into a memory of a magnetic resonance (MR) control unit of a MR system, wherein the computer program when executed is configured to, with the MR control unit, cause the MR system to:
- determine a time characteristic of at least one magnetic field gradient used during an imaging sequence;
- determine a time derivative of the time characteristic of the at least one magnetic field gradient;
- determine change time points at which a value of the time derivative of the time characteristic of the at least one magnetic field gradient changes;
- and
- determine a simulation of an electrical stimulation for the imaging sequence, wherein the simulation is restricted to only the determined change time points.
An electronically readable data carrier with electronically readable non-transitory control information stored thereupon, wherein the electronically readable data carrier is configured to, when used in a magnetic resonance (MR) control unit of a MR system, cause the MR system to:
- determine a time characteristic of at least one magnetic field gradient used during an imaging sequence;
- determine a time derivative of the time characteristic of the at least one magnetic field gradient;
- determine change time points at which a value of the time derivative of the time characteristic of the at least one magnetic field gradient changes;
- and
- determine a simulation of an electrical stimulation for the imaging sequence, wherein the simulation is restricted to only the determined change time points.
Dependencies are inferred from the claim text.