Device for compensating electromagnetic interferences during biomagnetic measurements

A device for compensating electromagnetic interferences during biomagnetic measurements at a high level of external electromagnetic interferences, comprising:

• a measuring device of biomagnetic signals,
• a device for passively compensating said electromagnetic interferences, wherein:
• the measuring device is configured to register three components of the biomagnetic signals, including three projections of the magnetic field vector and/or its spatial gradient of first or higher order,
• the device for compensating electromagnetic interferences comprises at least three compensation elements and a moving structure for moving the compensation elements, characterized in that, the compensation elements each comprise a short-circuited ring of arbitrary shape and are manufactured of electrically conductive materials with,
• the compensation elements are configured so that they have only inductive coupling with the said measuring device and no galvanic coupling,
• the compensation elements are placed around the said measuring device in space, and include three compensation elements placed in mutually intersecting planes respectively corresponding to said three projections,
• the moving structure comprises a shifting structure for shifting, a holding structure for holding, and a fixation structure for fixation of the compensation elements,
• the moving structure is configured to perform repeated displacement and fixation of the compensation elements for changing interference conditions at the location of the measuring device,
• said shifting, holding, and fixation structures are configured to are independently move the individual compensation elements, and,
• said fixation structures are configured to allow fixing of the compensation elements in positions with minimum amplitude of electromagnetic interferences at an the input of the said measuring device.