Magnetic field generating means (2) is disposed on a scalp (1) of a subject (P) and generates a magnetic field that is radiated from a north pole, passes through a cerebral cortex (3) of the subject (P) and returns to a south pole in a loop path. Magnetic field detecting means (5) is disposed on the scalp (1) and detects a change in the magnetic field (4) as a signal reflecting an activity status of the cerebral cortex (3).

A magnetic shield apparatus for shielding magnetic field probes. The shield apparatus comprises an outer shield, and an inner shield contained within the outer shield. A magnetic field sensor is housed in the inner shield, and the outer shield and the inner shield comprise a magnetically permeable material, enclosing a volume and having at least a first end that is open.

A magnetic sensor device includes a magnetic field converter that receives an input magnetic field input along a first direction and outputs an output magnetic field along a second direction, which is orthogonal to the first direction. A magnetic field detector is provided at a position where the output magnetic field is applied. A magnetic shield shields external magnetic fields along a third direction, which is orthogonal to both the first direction and the second direction. When viewed along the first direction, the magnetic field converter has a shape such that the length in the third direction is greater than the length in the second direction. When viewed along the first direction, the magnetic shield is provided at a position overlapping the magnetic field converter and the magnetic field detector, and the magnetic field transmittance of the external magnetic field is 1˜30%.

In the present disclosure, there is provided a permeability measurement jig including a first waveguide, wherein a signal line of the first waveguide comprises an excited magnetic part at one end side, and a magnetic field is generated at the excited magnetic part by an excitation signal, and a second waveguide, wherein a signal line of the second waveguide comprises a detection part at one end side, a detection signal is induced at the detection part due to an action of the magnetic field generated at the excited magnetic part to a measurement sample, and the detection part is placed on the excited magnetic part to face the excited magnetic part at a predetermined distance. A permeability measurement device having the permeability measurement jig and a permeability measurement method are disclosed.

A shielding arrangement for a magnetoencephalography (MEG) system includes a passively shielded enclosure having a plurality of walls defining the passively shielded enclosure, each of the plurality of walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; a vestibular wall extending from a first vertical wall to define, and at least partially separate, a vestibular area of the passively shielded enclosure adjacent the doorway and a user area of the passively shielded enclosure; and active shield coils distributed within the passively shielded enclosure and configured to further reduce the ambient background magnetic field within the user area of the passively shielded enclosure.

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.

A current detection device includes a plane-shaped first coil pattern having a winding number of at least two or more, a magnetic field detection element isolated from the first coil pattern in a direction orthogonal to a plane of the first coil pattern, and arranged to receive a magnetic field formed by the first coil pattern, a driving circuit configured to drive the magnetic field detection element and output an output signal, a second coil pattern, a first substrate on the first coil pattern, a second substrate on the second coil pattern, and a third substrate on the magnetic field detection element. The magnetic field detection element is provided between the first coil pattern and the second coil pattern.

A radiofrequency (RF) shielding conduits that can be embedded within a doorframe and/or a door of a magnetic resonance imaging (MRI) room are disclosed. The RF shielding conduits can form, upon closing of door onto the doorframe, an RF shielding channel to enclose and/or allow passage of tubing of medical equipment extending from an interior of the MRI room to an environment that is external to the MRI room, while providing a RF shielding of the MRI room.

A radiofrequency (RF) shielding conduits that can be embedded within a doorframe and/or a door of a magnetic resonance imaging (MRI) room are disclosed. The RF shielding conduits can form, upon closing of door onto the doorframe, an RF shielding channel to enclose and/or allow passage of tubing of medical equipment extending from an interior of the MRI room to an environment that is external to the MRI room, while providing a RF shielding of the MRI room.

In a described example, a structure includes a substrate having a surface with multiple sides. A sensor is positioned within the substrate and a seed layer is over at least four sides of the surface of the substrate. A magnetic shield layer is over the seed layer for the at least four sides of the surface of the substrate.