A gradient coil system suitable for use in an MRI system. The gradient coil system having a gradient body having a bore extending therethrough and at least one frustoconical portion arranged about the bore. A diameter of a first end of the bore is greater than a diameter of a second end of the bore. The gradient coil system also includes a gradient coil assembly arranged about the bore having at least one frustoconical section substantially conforming to the at least one frustoconical portion of the body, the gradient coil assembly generating gradient fields in a Diameter of Spherical Volume (DSV) for medical imaging.

The present disclosure relates to a magnetic resonance (MR) scanner and magnetic resonance imaging (MRI) system. The MR scanner includes a superconducting magnet, a superconducting quantum processor, a first cooling system surrounding the superconducting magnet, and a second cooling system surrounding the superconducting quantum processor. The second cooling system is embedded in the first cooling system.

A magnetic sensor includes a magnetic field conversion unit that outputs an output magnetic field, a magnetic field detection unit that the output magnetic field can be applied, and a magnetic shield that shields external magnetic fields. The length of the magnetic field conversion unit in the third direction is greater than the length in the second direction. The magnetic shield overlaps the magnetic field conversion unit and the magnetic field detection unit. The magnetic field detection unit includes a Wheatstone bridge circuit in which a first bridge circuit including first and second magnetic field detection units and a second bridge circuit including third and fourth magnetic field detection units are connected in parallel. The first through fourth magnetic field detection units include two magnetoresistive units, and two of the magnetoresistive units have magnetoresistive effect elements that include magnetization fixed layers whose magnetization directions differ from each other.

The present disclosure relates to a shimming device. The shimming device may include at least one supporting component each of which is configured with a plurality of wire groove groups. Each of the plurality of wire groove groups may include a plurality of wire grooves. Each of the plurality of wire grooves may be in a closed shape. The closed shapes formed by the plurality of wire grooves may be nested. The shimming device may further include wires arranged in the wire grooves of the plurality of wire groove groups of the at least one supporting component.

A magnetic resonance tomography (MRT) unit includes a field magnet, a transmitter, and a transmitting antenna. The MRT unit also has a transmission interference suppression facility with a transmission interference suppression controller, a plurality of sensors, and a transmission interference suppression antenna. The transmission interference suppression facility is configured to pick up, with the sensors, an excitation signal of the transmitter, determine, with the transmission interference suppression controller, a transmission interference suppression signal as a function of the excitation signal of the transmitter, and emit the signal via the transmission interference suppression antenna, so that at a predetermined location outside of the MRT unit, an electromagnetic alternating field of an excitation signal emitted by the transmitter via the transmitting antenna is attenuated. The sensors are arranged in a near field of the transmitting antenna, and the predetermined location of the attenuation is in a far field of the transmitting antenna.

The disclosure relates to a gradient coil unit comprising at least one first conductor structure, which is configured to generate a magnetic field gradient in a first direction, and an eddy current compensating conductor structure, which is configured to compensate for a first magnetic field. The first magnetic field is generated by a current induced in the first conductor structure as a result of activation of a conductor structure comprised by the gradient coil unit.

An open-type MRI apparatus includes a pair of static magnetic field magnets and a pair of gradient magnetic field coils. Each static magnetic field magnet includes a discoid magnetic pole configured to generate a static magnetic field in a Z axis direction in which the pair of static magnetic field magnets are opposed each other, and an annular magnetic pole configured to generate a static magnetic field on an X-Y plane perpendicular to the Z axis direction. Each gradient magnetic field coil includes a Z coil configured to provide a magnetic field being gradient in the Z axis direction in the imaging region, a magnetic material block configured to shield the discoid magnetic pole from a magnetic flux generated from the Z coil, and a correction coil configured to shield the annular magnetic pole from the magnetic flux generated from the Z coil.

The present disclosure provides a biomagnetic field sensor system for diagnostic evaluation of a cardiac condition of an individual. The biomagnetic field sensor system may comprise an array of biomagnetic field sensors configured to sense an electromagnetic field associated with a heart of the individual and generate electromagnetic field data therefrom; a computer processor coupled to the array of biomagnetic field sensors; a memory configured to store the electromagnetic field data generated by the array of biomagnetic field sensors; and a non-transitory computer-readable medium encoded with a computer program including instructions that, when executed by the computer processor, cause the computer processor to receive the electromagnetic field data, and generate a diagnostic evaluation of a cardiac condition of the individual based at least in part on an analysis of the electromagnetic field data.

A magnetic resonance imaging (MRI) system, comprising a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, electromagnetic shielding provided to attenuate at least some electromagnetic noise in an operating environment of the MRI system, and an electrical conductor coupled to the electromagnetic shielding and configured to electrically couple to a patient during imaging of the patient by the MRI system. The magnetics system may include at least one permanent B.sub.0 magnet configured to produce a B.sub.0 magnetic field for an imaging region of the MRI system. The B.sub.0 magnetic field strength may be less than or equal to approximately 0.2 T.

According to some aspects, a low-field magnetic resonance imaging system is provided. The low-field magnetic resonance imaging (MRI) system comprises a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing MRI, the magnetics system comprising, a B.sub.0 magnet configured to produce a B.sub.0 field for the MRI system at a low-field strength of less than 0.2 Tesla (T), a plurality of gradient coils configured to, when operated, generate magnetic fields to provide spatial encoding of magnetic resonance signals, and at least one radio frequency coil configured to, when operated, transmit radio frequency signals to a field of view of the MRI system and to respond to magnetic resonance signals emitted from the field of view, a power system comprising one or more power components configured to provide power to the magnetics system to operate the MRI system to perform image acquisition, and a power connection configured to connect to a single-phase outlet to receive mains electricity and deliver the mains electricity to the power system to provide power needed to operate the MRI system.