Operating a magnetic resonance device

A magnetic resonance device comprising:

• a transmit, receive, or transmit and receive coil comprising a plurality of coil elements;
• and
• a controller configured to operate a magnetic resonance device during acquisition of magnetic resonance data using at least one magnetic resonance sequence of an acquisition procedure, wherein an acquisition technique using a plurality of coil elements of a transmit, receive, or transmit and receive coil in parallel is used, the operation of the magnetic resonance device comprising:
• for each coil element of the plurality of coil elements, acquisition of a sensitivity map describing a spatial sensitivity of the respective coil element at a start of the acquisition procedure;
• mergence of magnetic resonance data of the individual coil elements, the mergence of the magnetic resonance data comprising reconstruction of a magnetic resonance image dataset from the magnetic resonance data using the sensitivity maps;
• measurement of reference information indicating a position of a patient, the plurality of coil elements, or the patient and the plurality of coil elements at a start of an examination procedure;
• measurement of supplementary comparison information at at least one time instant during the acquisition procedure;
• and
• remeasurement of at least a portion of the sensitivity maps when at least one recalibration criterion describing a deviation exceeding a threshold value is fulfilled in a comparison of the supplementary comparison information with the reference information.

In a non-transitory computer-readable storage medium that stores instructions executable by one or more processors to operate a magnetic resonance device during acquisition of magnetic resonance data using at least one magnetic resonance sequence of an acquisition procedure, wherein an acquisition technique using a plurality of coil elements of a transmit, receive, or transmit and receive coil in parallel is used, the instructions comprising:

• for each coil element of the plurality of coil elements, acquiring a sensitivity map describing a spatial sensitivity of the respective coil element at a start of the acquisition procedure;
• merging magnetic resonance data of the individual coil elements, the merging of the magnetic resonance data comprising reconstructing a magnetic resonance image dataset from the magnetic resonance data using the sensitivity maps;
• measuring reference information indicating a position of a patient, the plurality of coil elements, or the patient and the plurality of coil elements at a start of an examination procedure;
• measuring supplementary comparison information at at least one time instant during the acquisition procedure;
• and
• remeasuring at least a portion of the sensitivity maps when at least one recalibration criterion describing a deviation exceeding a threshold value is fulfilled in a comparison of the supplementary comparison information with the reference information.