An antenna apparatus for a radio frequency (RF) coil to transmit signals to and to receive signal from a subject in a magnetic resonance imaging (MRI) system includes a distal surface facing away from the subject, a proximal surface facing towards the subject, a high permittivity material (HPM) having a shape, and an antenna coupled to the HPM and positioned on the proximal surface such that the antenna is positioned between the HPM and the subject.

There is provided a method of producing a device for manipulating a magnetic field of RF radiation from one or more RF antenna in an MR system. The method comprises: determining a target resonance quality factor and/or a target resonant RF frequency of the device based on at least one characteristic of the one or more RF antenna; determining a design of the device to provide the device with the determined target resonance quality factor and/or target resonant RF frequency; and making the device in accordance with the design. The device comprises: a plurality of conductive elements arranged in an array, wherein the array is arranged to redistribute energy between electric and magnetic fields of the RF radiation at a resonant RF frequency when receiving the RF radiation, the RF radiation having an RF wavelength greater than a respective dimension of each conductive element; and a dielectric material, wherein the dielectric material has a dielectric permittivity and a loss tangent.

A magnetic resonance system has an air suction apparatus configured and arranged so as to suck air exhaled by a patient examined by the MR system. A method for operating the MR system is also provided, with which air exhaled by a patient examined by the MR system is sucked in.

An alarm device for an MRI system may include a body, an operating member, a generator, a power manager and a signal emitter. The operating member may be movably connected to the body. The generator may be connected to the operating member and can convert kinetic energy of motion of the operating member to electrical energy. The power manager may be connected to the generator and can convert electrical energy generated by the generator to an output current. The signal emitter may be connected to the power manager and can use energy obtained from the output current to send a trigger signal wirelessly. Advantageously, the alarm device does not need an external power supply and has a high level of reliability.

Movement detection of at least one part of a subject located inside a magnetic resonance imaging (MRI) device is provided. A method includes performing an MR scan by executing a programmable MR sequence protocol. The sequence protocol includes MR excitation pulses to be transmitted via a parallel transmit system and receive time windows for receiving magnetic resonance signals via a receive system. The MR sequence protocol includes, in between the MR excitation pulses, the generation of multi-channel pilot tone signals that are transmitted via the parallel transmit system and an RF transmit coil array. During transmission of the multi-channel pilot tone signals, the pilot tone signals are received with an RF receive coil array. The received pilot tone signals are forwarded via the receive system to an analyzing unit, and movement of at least one part of the subject is determined by analyzing the received pilot tone signal.

Systems and methods for MRI are provided. The methods may include for each slice of a plurality of slices of a subject to be scanned, determining a plurality of radiofrequency (RF) parameters, the plurality of RF parameters including at least one channel parameter corresponding to each of a plurality of channels; determining a slice group based at least in part on the RF parameters corresponding to the plurality of slices, the slice group including at least two slices selected from the plurality of slices; and directing at least a portion of the plurality of channels to excite the slice group based on RF parameters corresponding to the slice group.

A portable system has a magnet, magnet bore and shielding. The magnet bore extends through the magnet, and the magnet bore configured to receive at least some portion of a patient. The shielding forms a shielding area, and the shielding includes one or more layers. The shielding has a material that provides magnetic shielding that reduces or prevents a static magnetic field (SMF); a material that provides electromagnetic shielding and reduces or prevents a time-varying-electromagnetic field (EMF); a removable shielding removable or movable, wherein the patient is able to move into our out of the magnet bore when the removable shielding is in a moved position or a removed position and the removable shielding; and a shielding adapter covering a connection of devices and extending from the exterior of the portable system. All or a portion of the shielding includes a transparent portion.

According to one embodiment, a bed system that is mechanically and electrically connectable to a main body of a medical image diagnosis apparatus includes a traveling unit and an interface. The traveling unit provided between the bed system and a floor surface. The interface configured to receive an operation of locking or unlocking driving of the traveling unit. The operation on the interface of locking or unlocking driving of the traveling unit is interlocked with electrical connection between the bed system and the main body.

An MR measuring assembly (3) with an MR device (2) is provided, which has a main magnet (4) generating a stray magnetic field and a platform (1), having a side border (5), on which the MR device (2) is placed. The border (5) marks an iso-contour surface of the stray field at a specified magnetic field strength. The platform (1) therefore forms a natural barrier that prevents people or objects being exposed to magnetic field strengths that are too high. To this end provision is additionally made, in accordance with the invention, for a step (15) for the marking of an iso-contour surface of a stray magnetic field of an MR device (2) at a specified magnetic field to be used.

According to some aspects, an apparatus is provided comprising a deployable guard device, configured to be coupled to a portable medical imaging device, the deployable guard device further configured to, when deployed, inhibit encroachment within a physical boundary with respect to the portable medical imaging device. According to some aspects, an apparatus is provided comprising a deployable guard device, configured to be coupled to a portable magnetic resonance imaging system, the deployable guard device further configured to, when deployed, demarcate a boundary within which a magnetic field strength of a magnetic field generated by the portable magnetic resonance imaging system equals or exceeds a given threshold.