Magnetic Resonance Imaging System and Method for Rapid Shutdown and Recharge of a Superconducting Magnet

    公开(公告)号:US20220349968A1

    公开(公告)日:2022-11-03

    申请号:US17810525

    申请日:2022-07-01

    摘要: A magnetic resonance imaging (MRI) system includes a set of magnet coils for generating a magnetic field. The set of magnet coils are composed of a superconducting material. The system further includes a mechanical cryocooler in thermal contact with the set of magnet coils and operable to reduce and maintain a temperature of the set of magnet coils below a transition temperature of the superconducting material, and an energy storage device coupled to the set of magnet coils. The energy storage device may be capable of receiving and storing energy dissipated from the set of magnet coils during rapid shutdown of the set of magnet coils. The system may also include a controller coupled to the energy storage device. The controller may be programmed to recharge the set of magnet coils using the energy stored in the energy storage device during the rapid shutdown of the set of magnet coils.

    System and method to reduce eddy current artifacts in magnetic resonance imaging

    公开(公告)号:US11378639B2

    公开(公告)日:2022-07-05

    申请号:US16983745

    申请日:2020-08-03

    IPC分类号: G01R33/565 G01R33/58

    摘要: Some implementations provide a system that includes: a housing having a bore in which a subject to be image is placed; a main magnet configured to generate a volume of magnetic field within the bore, the volume of magnetic field having inhomogeneity below a defined threshold; one or more gradient coils configured to linearly vary the volume of magnetic field as a function of spatial location; one or more pulse generating coils configured to generate and apply radio frequency (RF) pulses to the volume of magnetic field in sequence to scan the portion of the subject; one or more shim gradient coils configured to perturb a spatial distribution of the linearly varying volume of magnetic field; and a control unit configured to operate the gradient coils, pulse generating coils, and shim gradient coils such that only the user-defined region within the volume of magnetic field is imaged.

    Flexible high resolution endoscope

    公开(公告)号:US11330970B2

    公开(公告)日:2022-05-17

    申请号:US16326349

    申请日:2016-08-17

    摘要: A flexible high resolution endoscope is provided herein. The endoscope comprises: a plurality of optical fiber bundles; a plurality of lenses in a one-to-one relationship with the plurality of optical fiber bundles; and, a plurality of cameras in a one-to-one relationship with the plurality of optical fiber bundles, each respective optical fiber bundle, of the plurality of optical fiber bundles, having a respective lens, of the plurality of lenses, located at a respective distal end, and a camera, of the plurality of cameras, located at a respective proximal end, the plurality of optical fiber bundles being coupled together at a common distal end, and otherwise being uncoupled from one another, a bending radius of the endoscope defined by a largest respective bending radius of each of the plurality of optical fiber bundles.

    Trajectory alignment system and methods

    公开(公告)号:US11278353B2

    公开(公告)日:2022-03-22

    申请号:US15071251

    申请日:2016-03-16

    摘要: The navigation systems and methods facilitate aligning a tool in relation to a trajectory in real-time to receive input data from a pre-operative plan image, at least one multi-modal image, and at least one real-time multi-modal image; interactively track at least one neural fiber, whereby interactively tracked fiber data is obtainable; automatically generate output data by way of data transformation using the input data and the interactively tracked neural fiber data; and transmit the output data to at least one of: at least one display device for rendering at least one real-time interactive navigation display for facilitating neural navigation, and at least one drive device for positioning at least one tracking device in relation to the tool in real-time, whereby real-time alignment data is achievable, and whereby at least one neurological structure is preservable.

    System and method for increased signal-to-noise ratio in multi spin-echo pulse imaging

    公开(公告)号:US11269025B2

    公开(公告)日:2022-03-08

    申请号:US16819901

    申请日:2020-03-16

    摘要: The present disclosure provides a system for and a method of obtaining a magnetic resonance image by performing magnetic resonance imaging (MRI) at multiple slices simultaneously. The method comprises generating a multiband pulse sequence for spin-echo imaging, the pulse sequence comprising a multiband excitation pulse and at least one multiband refocusing pulse, wherein the multiband excitation pulse simultaneously excites multiple bands, wherein the at least one multiband refocusing pulse simultaneously refocuses the multiple bands, and wherein the phases of the bands excited by the multiband excitation pulse and the phases of the bands refocused by the at least one multiband refocusing pulse are set according to a single row of an orthogonal encoding matrix. The multiband excitation pulse and the at least one multiband refocusing pulse collectively form a multiband pulse pair.

    METHOD, SYSTEM AND APPARATUS FOR TRACKING SURGICAL IMAGING DEVICES

    公开(公告)号:US20220015636A1

    公开(公告)日:2022-01-20

    申请号:US17449671

    申请日:2021-10-01

    摘要: A computing device and methods for tracking surgical imaging devices stores a preoperative image of patient tissue registered to a frame of reference of a tracking system; and receives, from a first imaging device, a first intraoperative image of a first region of the tissue, with a finer resolution than the preoperative image. The computing device receives a position of the first imaging device from the tracking system, and registers the first intraoperative image with the frame of reference. The computing device receives, from a second imaging device, a second intraoperative image of a second region of the patient tissue, with a finer resolution than the first intraoperative image. The computing device registers the second intraoperative image to the first intraoperative image; and controls a display to present the preoperative image overlaid with the first intraoperative image, and the first intraoperative image overlaid with the second intraoperative image.