Various methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI). In one embodiment, an RF coil assembly for an MRI system includes a posterior end including a first set of flexible RF coils; an anterior end including a second set of flexible RF coils; a central section extending between the posterior end and anterior end, wherein the posterior end and the anterior end are bendable to the central section. Each flexible RF coil of the first set and second set of flexible RF coils includes a loop portion comprising a coupling electronics portion and at least two parallel, distributed capacitance wire conductors encapsulated and separated by a dielectric material.

An energy delivery system comprises a transmission member and an antenna at a distal end of the transmission member. The antenna includes a first conductive arm, an insulator extending around the first conductive arm, and a second conductive arm. The second conductive arm includes a coil. The system also comprises a barrier layer radially spaced from the insulator and surrounding the transmission member and antenna. The barrier layer extends from a proximal portion of the transmission member to a distal portion of the antenna. The system also comprises a jacket surrounding the barrier layer and forming a fluid channel for flow of a cooling fluid.

The invention relates to a device for magnetic measurements and/or magnetic imaging such as an MRI device or a hybrid MEG-MRI device. The device comprises an array of one or more detectors for the magnetic signal and one or more coils for producing preparatory magnetic field pulses. The device further comprises means to drive current pulses through the said coils, wherein at least one of the coils comprises material that is Type-II superconducting at the operating temperature. The device is configured to cancel out at least part of the field generated by the remanent magnetization after a current pulse by the shape of the current pulse and/or the geometrically balanced design of the coil.

In some aspects, a resonator device includes a dielectric substrate, a ground plane on a first side of the substrate, and conductors on a second, opposite side of the substrate. The conductors include first and second resonators and two baluns. Each balun includes a feed, a first branch and a second branch. The feed is connected to the first and second branches, and the first and second branches are capacitively coupled to the respective first and second resonators. The first branch includes a delay line configured to produce a phase shift relative to the second branch. The resonator device includes a sample region configured to support a magnetic resonance sample between the first and second resonators.

The invention relates to a local coil matrix and to a magnetic resonance scanner for operation by means of a low magnetic field. The local coil matrix according to the invention has a first coil winding and a second coil winding and a first low-noise pre-amplifier and second pre-amplifier, each electrically connected to a coil winding. The first coil winding has a broadband matching in a first frequency range at a Larmor frequency to the first pre-amplifier connected thereto.

According to some embodiments, a system for facilitating non-invasive in-situ imaging of metabolic processes of plants is disclosed. The system may include a frame comprises a frame body and a base member. Further, the system may include at least one rare-earth permanent magnet disposed on the frame. Further, the system may include at least one arm coupled to the frame. Further, the system may include at least one coil disposed on a first end of an arm of the at least one arm. Further, the system may include at least one sensor disposed on the frame. Further, the system may include a processing device communicatively coupled with the at least one sensor and the at least one coil. Further, the system may include an actuator communicatively coupled with the processing device. Further, the system may include a presentation device disposed on the frame.

According to some embodiments, a system for facilitating non-invasive in-situ imaging of metabolic processes of plants is disclosed. The system may include a frame comprises a frame body and a base member. Further, the system may include at least one rare-earth permanent magnet disposed on the frame. Further, the system may include at least one arm coupled to the frame. Further, the system may include at least one coil disposed on a first end of an arm of the at least one arm. Further, the system may include at least one sensor disposed on the frame. Further, the system may include a processing device communicatively coupled with the at least one sensor and the at least one coil. Further, the system may include an actuator communicatively coupled with the processing device. Further, the system may include a presentation device disposed on the frame.

A system may comprise a magnetic resonance imaging (MRI) device including a bore that is configured to accommodate a subject. The MRI device may include multiple superconducting magnets configured to generate a magnetic field in the bore. The MRI device may include one or more superconducting connections each of which is configured to connect at least two of the multiple superconducting magnets. The system may further include a radiation source configured to emit a radiation beam toward the bore. The radiation source may be able to rotate in a plane perpendicular to a direction of the magnetic field in the bore. The MRI device may further include one or more protection components configured to prevent at least a portion of the radiation beam from irradiating the one or more superconducting connections.

In some aspects, a resonator device includes a dielectric substrate, a ground plane on a first side of the substrate, and conductors on a second, opposite side of the substrate. The conductors include first and second resonators and two baluns. Each balun includes a feed, a first branch and a second branch. The feed is connected to the first and second branches, and the first and second branches are capacitively coupled to the respective first and second resonators. The first branch includes a delay line configured to produce a phase shift relative to the second branch. The resonator device includes a sample region configured to support a magnetic resonance sample between the first and second resonators.

An asymmetric magnet for use in performing MRI of a patient's head. The magnet has a patient end. The magnet provides an offset imaging volume (35) in a recess with an isocentre that is positioned closer to the patient end than an opposite end. The magnet has at least three groups of coils (44, 45, 46) in a generally tapering arrangement. The magnet also has an additional group of coils (47). A first group of coils (44) overlaps the additional group of coils (47), such that a bottom portion (47″) of the additional group of coils (47) is positioned closer to the patient end of the magnet than a top portion (44′) of the first group of coils (44).