Devices and systems as described herein is configured to sense a signal, such as a signal from an individual. In some embodiments, a signal is a magnetic field. In some embodiments, a source of a signal is an individual's organ, such as a heart muscle. A device or system, in some embodiments, comprises one or more sensors, such as an array of sensors configured to sense the signal. A device or system, in some embodiments, comprises a shield or portion thereof to reduce noise and enhance signal collection.

Provided is a magnetic field measurement device which includes a magnetic sensor array that is composed of a plurality of magnetic sensor cells, each of which has a magnetic sensor and an output unit for outputting an output signal, arranged at lattice points between two curved surfaces, each of which is bent in one direction, so as to be three-dimensionally arranged, and is capable of detecting an input magnetic field in three-axial directions, a measurement data acquisition unit configured to acquire measurement data measured by the magnetic sensor array, and a magnetic field reconstruction unit configured to reconstruct a magnetic field of a component orthogonal to a virtual sensor array plane with respect to one or more positions on the virtual sensor array plane, which is a plane specified in a three-dimensional space, using the measurement data.

A magnetic field measuring apparatus according to an example embodiment includes: an external container; an internal container storing a liquid refrigerant, disposed inside the external container, and including a neck portion having a first diameter and a body portion having a second diameter greater than the first diameter, wherein a space between the internal container and the external container is maintained in a vacuum state; a SQUID sensor module mounting plate disposed below the internal container; a plurality of SQUID sensor modules mounted below the SQUID sensor module mounting plate; and a 4K heat shielding portion formed of a conductive mesh disposed to surround the SQUID sensor module mounting plate and the plurality of SQUID sensor modules.

A magnetic field measuring apparatus according to an example embodiment includes: an external container; an internal container storing a liquid refrigerant, disposed inside the external container, and including a neck portion having a first diameter and a body portion having a second diameter greater than the first diameter, wherein a space between the internal container and the external container is maintained in a vacuum state; a SQUID sensor module mounting plate disposed below the internal container; a plurality of SQUID sensor modules mounted below the SQUID sensor module mounting plate; and a 4K heat shielding portion formed of a conductive mesh disposed to surround the SQUID sensor module mounting plate and the plurality of SQUID sensor modules.

A magnetic field measurement apparatus including a magnetic sensor array having magnetic sensor cells capable of detecting magnetic fields in three axial directions arranged in three dimensions, each magnetic sensor cell including a plurality of magnetic sensors that each have a magnetoresistive element and a magnetic flux concentrator arranged at least at one of one end and another end of the magnetoresistive element; AD converters that respectively convert analog detection signals output by the magnetic sensors into digital measurement data; a magnetic field acquiring section that acquires the digital measurement data; a calibration computing section that calibrates the digital measurement data from the magnetic field acquiring section, using at least one of a main-axis sensitivity, cross-axis sensitivities, and an offset; and a gradient magnetic field computing section that calculates a gradient magnetic field using magnetic field measurement data resulting from the calibration of the digital measurement data.

A magnetic field measurement apparatus including a magnetic sensor array having magnetic sensor cells capable of detecting magnetic fields in three axial directions arranged in three dimensions, each magnetic sensor cell including a plurality of magnetic sensors that each have a magnetoresistive element and a magnetic flux concentrator arranged at least at one of one end and another end of the magnetoresistive element; AD converters that respectively convert analog detection signals output by the magnetic sensors into digital measurement data; a magnetic field acquiring section that acquires the digital measurement data; a calibration computing section that calibrates the digital measurement data from the magnetic field acquiring section, using at least one of a main-axis sensitivity, cross-axis sensitivities, and an offset; and a gradient magnetic field computing section that calculates a gradient magnetic field using magnetic field measurement data resulting from the calibration of the digital measurement data.

Provided is a method for assessing a correlation degree and an influence degree between a health degree in a health domain of concern and each preventive interventional action, based on biological information acquired in a time-series manner. The method comprises: acquiring biological information of an individual in a time-series manner; performing, based on the acquired biological information, an assessment of a health degree of the individual in a time-series manner; acquiring an intervention amount of each of one or more preventive interventional actions in a time-series manner; deriving a correlation degree and an influence degree between the time-series intervention amount of each of the one or more preventive interventional actions and the time-series health degree of the individual; and determining, as a relevant preventive interventional action, a preventive interventional action whose correlation degree is a given value or more, among the one or more preventive interventional actions.

Provided is a method for assessing a correlation degree and an influence degree between a health degree in a health domain of concern and each preventive interventional action, based on biological information acquired in a time-series manner. The method comprises: acquiring biological information of an individual in a time-series manner; performing, based on the acquired biological information, an assessment of a health degree of the individual in a time-series manner; acquiring an intervention amount of each of one or more preventive interventional actions in a time-series manner; deriving a correlation degree and an influence degree between the time-series intervention amount of each of the one or more preventive interventional actions and the time-series health degree of the individual; and determining, as a relevant preventive interventional action, a preventive interventional action whose correlation degree is a given value or more, among the one or more preventive interventional actions.

A vapor cell which can increase the S/N ratio of light as a signal and has high accuracy and a vapor cell manufacturing method are provided. The vapor cell includes: a reflection space (14) provided so as to be able to store a gas containing an alkali metal atom; and an incident light reflection surface, an in-plane reflection portion (17), and an emission light reflection surface provided inside the reflection space (14). The incident light reflection surface has an elevation angle of 45° from an optical path plane so that the incident light incident from a predetermined external direction is reflected in the optical path plane that is perpendicular to the incident light. The in-plane reflection portion (17) has a reflection surface that reflects the reflected light from the incident light reflection surface, the reflection surface being substantially perpendicular to the optical path plane so that the reflected light from the incident light reflection surface is reflected in the optical path plane once or multiple times. The emission light reflection surface has an elevation angle 45° from the optical path plane so that the reflected light from the in-plane reflection portion (17) is reflected in a direction substantially perpendicular to the optical path plane and an emission light is emitted to the outside.

A magnetocardiography (MCG) system includes a passively shielded enclosure having walls defining the passively shielded enclosure, each of the walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; an MCG measurement device including optically pumped magnetometers (OPMs); and active shield coils within the passively shielded enclosure and stationary relative to the passively shielded enclosure and the MCG measurement device, wherein the active shield coils are configured to further reduce the ambient background magnetic field within a user area of the passively shielded enclosure.