Various embodiments comprise an apparatus to mitigate Electrostatic Discharge (ESD) buildup. In some examples, the apparatus comprises an Optically Pumped Magnetometer (OPM) and a connector. The connector is operatively coupled to the OPM. The OPM is configured to sense magnetic fields. The connector comprises a protective shorting link. The connector is configured to disconnect the protective shorting link in response to coupling and to connect the protective shorting link in response to decoupling.

Some aspects comprise a tuning system configured to tune a radio frequency coil for use with a magnetic resonance imaging system comprising a tuning circuit including at least one tuning element configured to affect a frequency at which the radio frequency coil resonates, and a controller configured to set at least one value for the tuning element to cause the radio frequency coil to resonate at approximately a Larmor frequency of the magnetic resonance imaging system determined by the tuning system. Some aspects include a method of automatically tuning a radio frequency coil comprising determining information indicative of a Larmor frequency of the magnetic resonance imaging system, using a controller to automatically set at least one value of a tuning circuit to cause the radio frequency coil to resonate at approximately the Larmor frequency based on the determined information.

The invention provides for a medical imaging system (100, 300). The medical imaging system (100, 300) comprises a processor (104). Execution of machine executable instructions (120) causes the processor (104) to: receive magnetic resonance data, wherein the magnetic resonance data comprises B0 field data (122) of a reference scan for a plurality of voxels and water saturation data (124) of a WASSR scan for a subset of voxels of the plurality of voxels, the water saturation data (124) comprising data of a limited number of sample points; determine a local absolute water saturation frequency (130) for each voxel of the subset using the water saturation data (124) of the WASSR scan; and reconstruct a field map (132) comprising a local absolute water saturation frequency for each voxel of the plurality of voxels, wherein the reconstruction comprises determining relative frequency differences between the voxels using the B0 field data (122) of the reference scan and adding a frequency offset to the relative frequency differences based on the determined local absolute water saturation frequencies (130) of the subset.

A measurement apparatus including: a static magnetic field applying part that applies a static magnetic field having a constant magnitude in a first direction to a measurement target; a plurality of current applying parts applying a plurality of AC currents oriented in a plurality of directions toward a portion of the measurement target via an electrode pair; a magnetic field detecting element that detects a magnitude of a magnetic field generated from the portion of the measurement target in response to the static magnetic field having the constant magnitude in the first direction and the plurality of AC currents; a calculating part for calculating impedance of the portion of the measurement target; and an internal information output part for generating information including an internal component of the measurement target.

A measurement apparatus including: a static magnetic field applying part that applies a static magnetic field having a constant magnitude in a first direction to a measurement target; a plurality of current applying parts applying a plurality of AC currents oriented in a plurality of directions toward a portion of the measurement target via an electrode pair; a magnetic field detecting element that detects a magnitude of a magnetic field generated from the portion of the measurement target in response to the static magnetic field having the constant magnitude in the first direction and the plurality of AC currents; a calculating part for calculating impedance of the portion of the measurement target; and an internal information output part for generating information including an internal component of the measurement target.

Systems and method for a multi-array magnetic sensing component, which can include a circuit base platform; a set of magnetic sensors arranged on the circuit base platform; and a circuit system comprising intermediary circuit components, signal input, and a signal output, the signal input being an electrical oscillator signal input and being directable to each magnetic sensor in the set of magnetic sensors, the signal output including magnetic field measurements from the set of magnetic sensors, wherein each magnetic field measurement is individually selectable, the circuit system being configured to turn on or off subsets of the set of magnetic sensors, and the intermediary circuit components including a mixer.

Systems and method for a multi-array magnetic sensing component, which can include a circuit base platform; a set of magnetic sensors arranged on the circuit base platform; and a circuit system comprising intermediary circuit components, signal input, and a signal output, the signal input being an electrical oscillator signal input and being directable to each magnetic sensor in the set of magnetic sensors, the signal output including magnetic field measurements from the set of magnetic sensors, wherein each magnetic field measurement is individually selectable, the circuit system being configured to turn on or off subsets of the set of magnetic sensors, and the intermediary circuit components including a mixer.

A magnetic field sensor which can achieve sensitivities competitive with modern sensors while simultaneously maintaining a small size, low power consumption, simplicity of design, and low cost. The magnetic field sensor utilizes nonlinear precession dynamics of subatomic spins to attain parametric amplification of a magnetic field. A preliminary experimental implementation of the proposed concept establishes its feasibility and can already demonstrate significant benefits over existing approaches to sensing.

A magnetic field sensor which can achieve sensitivities competitive with modern sensors while simultaneously maintaining a small size, low power consumption, simplicity of design, and low cost. The magnetic field sensor utilizes nonlinear precession dynamics of subatomic spins to attain parametric amplification of a magnetic field. A preliminary experimental implementation of the proposed concept establishes its feasibility and can already demonstrate significant benefits over existing approaches to sensing.

A diamond magnetic sensor including diamond containing at least one NV.sup.− center, a microwave generator which emits microwaves to the diamond, an excitation light generator which emits excitation light to the NV.sup.− center of the diamond, and a fluorescence sensor which receives fluorescence produced from the NV.sup.− center of the diamond includes a pattern measurement apparatus which measures a temporal change pattern of magnetic field intensity based on variation in fluorescence intensity sensed by the fluorescence sensor.