Magnetic resonance tomography with simulation-based interference reduction

A magnetic resonance tomography system comprising:

• a main receiving antenna;
• at least one auxiliary receiving antenna arranged outside an examination region;
• a controller;
• and
• a computer configured to carry out a simulation of a predetermined MR sequence of an object to determine at least one simulation signal relating to a temporal and spatial course of the transverse magnetization of an ensemble of nuclear spins of the object and to determine a resting period of the MR sequence in dependence on the at least one simulation signal, wherein, during the resting period, an absolute value of an expected MR signal amplitude is always less than or equal to a predetermined limit value;
• wherein the controller is configured to actuate the magnetic resonance tomography system to carry out an MR recording of the object in accordance with the MR sequence, wherein, during an analysis period corresponding to the resting period, in each case an analysis signal is received by the main receiving antenna and the at least one auxiliary receiving antenna, to determine at least one interference suppression parameter in dependence on the analysis signals, and to generate an interference-suppressed MR signal based on an MR signal and interference signals and the at least one interference suppression parameter, wherein, during MR recording outside the analysis period, the MR signal is received by the main receiving antenna and one of the interference signals is in each case received by the at least one auxiliary receiving antenna.

A non-transitory computer readable storage medium having stored thereon instruction executable by a processor, the instructions comprising:

• determining, by a computer, at least one simulation signal relating to a temporal and spatial course of a transverse magnetization of an ensemble of nuclear spins of an object with a simulation of a predetermined MR sequence for the object;
• determining a resting period of the MR sequence in dependence on the at least one simulation signal, wherein, during the resting period, an absolute value of an expected MR signal amplitude is always less than or equal to a predetermined limit value;
• carrying out an MR recording of the object by the magnetic resonance tomography system in accordance with the MR sequence, wherein, during an analysis period corresponding to the resting period, an analysis signal is received in each case by a main receiving antenna and at least one auxiliary receiving antenna;
• determining at least one interference suppression parameter in dependence on the analysis signals;
• receiving an MR signal by the main receiving antenna during the MR recording, the MR signal received outside the analysis period;
• receiving an interference signal in each case by the at least one auxiliary receiving antenna;
• and
• generating an interference-suppressed MR signal based on the MR signal, the interference signals and the at least one interference suppression parameter.