A method for determining positional information of a target organ of a human subject during a biomagnetic field scan comprises detecting, by a plurality of magnetometers, first biomagnetic field signals from at least a portion of the human subject's organ and second magnetic field signals from an electromagnetic transmitter positioned on a predetermined position of the human subject. The plurality of magnetometers have a known position during the biomagnetic field scan. The method includes determining a time-varying spatial relationship between the electromagnetic transmitter and the plurality of magnetometers based on the detected second magnetic field signals. The method further includes correcting artifacts in the detected first biomagnetic signals in accordance with the determined spatial relationship.

A method for determining positional information of a target organ of a human subject during a biomagnetic field scan comprises detecting, by a plurality of magnetometers, first biomagnetic field signals from at least a portion of the human subject's organ and second magnetic field signals from an electromagnetic transmitter positioned on a predetermined position of the human subject. The plurality of magnetometers have a known position during the biomagnetic field scan. The method includes determining a time-varying spatial relationship between the electromagnetic transmitter and the plurality of magnetometers based on the detected second magnetic field signals. The method further includes correcting artifacts in the detected first biomagnetic signals in accordance with the determined spatial relationship.

A system includes a magnetocardiography (MCG) subsystem having a plurality of magnetometers. The system measures, via the MCG subsystem using the plurality of magnetometers, MCG data comprising biomagnetic field signals from a human subject. the system receives, from one or more ECG electrodes that are physically coupled to the human subject, ECG data comprising cardiac electrical activity of a heart of the human subject. The system determines location information of the one or more electrodes that are mounted on the human subject. In some embodiments, the system enhances the measured MCG data and/or the received ECG data according to determined location information of the one or more electrodes.

A system for measuring magnetic fields from a subject's organ comprises a plurality of unshielded magnetometers in a three-dimensional arrangement and an electromagnetic source. The system is configured to simultaneously collect, via each magnetometer of the plurality of magnetometers, (i) a biomagnetic field from at least a portion of the subject's organ, (ii) an electromagnetic signal from the electromagnetic source, and (iii) a background magnetic field. The system is configured to synchronize a plurality of magnetic signals collected by the plurality of magnetometers according to the electromagnetic signal from the electromagnetic source. The system is configured to output a signal indicative of the collected biomagnetic field and the background magnetic field in accordance with the synchronizing. The system is configured to operate without magnetic shielding.

A system for measuring magnetic fields from a subject's organ comprises a plurality of unshielded magnetometers in a three-dimensional arrangement and an electromagnetic source. The system is configured to simultaneously collect, via each magnetometer of the plurality of magnetometers, (i) a biomagnetic field from at least a portion of the subject's organ, (ii) an electromagnetic signal from the electromagnetic source, and (iii) a background magnetic field. The system is configured to synchronize a plurality of magnetic signals collected by the plurality of magnetometers according to the electromagnetic signal from the electromagnetic source. The system is configured to output a signal indicative of the collected biomagnetic field and the background magnetic field in accordance with the synchronizing. The system is configured to operate without magnetic shielding.

A magnetic sensor includes: a sensor head having a magnetic material; a drive unit configured to energize the sensor head; a pickup coil close to the sensor head; and an information processing unit configured to generate a bias magnetic field by energizing the pickup coil and detect a signal corresponding to an induced voltage generated in the pickup coil, in which the information processing unit generates a difference signal indicating a difference between a first signal corresponding to a first voltage generated in the pickup coil when the sensor head is in an energized state and a second signal corresponding to a second voltage generated in the pickup coil when the sensor head is in a non-energized state.

The invention relates to a method of localisation of vector magnetometers arranged in a network, comprising the following steps: generation (EMi), by a magnetic field source (S), of m reference magnetic fields with known amplitudes and known and distinct directions; measurement (MESj) of the m reference magnetic fields along n axes of magnetometers in the network, m and n being such that m*n6; determination (LOCj) of the position and orientation of magnetometers of the network from said measurements, relative to the magnetic field source. The invention also includes a magnetic field measurement instrument that includes a network of vector magnetometers and is capable of implementing the localisation method. Application to the imagery of biomagnetic fields, for example in magnetocardiography or in magnetoencephalography.

The invention relates to a method of localisation of vector magnetometers arranged in a network, comprising the following steps: generation (EMi), by a magnetic field source (S), of m reference magnetic fields with known amplitudes and known and distinct directions; measurement (MESj) of the m reference magnetic fields along n axes of magnetometers in the network, m and n being such that m*n6; determination (LOCj) of the position and orientation of magnetometers of the network from said measurements, relative to the magnetic field source. The invention also includes a magnetic field measurement instrument that includes a network of vector magnetometers and is capable of implementing the localisation method. Application to the imagery of biomagnetic fields, for example in magnetocardiography or in magnetoencephalography.

A device is for detecting magnetic signals generated by a beating heart. The device includes a support body having a contact surface, and an arrangement of at least two nitrogen-vacancy centers, NV, magnetometer units. The arrangement is embedded in the support body. The support body is configured to receive a user sitting or lying on the contact surface.

A device is for detecting magnetic signals generated by a beating heart. The device includes a support body having a contact surface, and an arrangement of at least two nitrogen-vacancy centers, NV, magnetometer units. The arrangement is embedded in the support body. The support body is configured to receive a user sitting or lying on the contact surface.