METHODS AND APPARATUS FOR MAGNETIC FIELD SHIMMING

    公开(公告)号:US20170276749A1

    公开(公告)日:2017-09-28

    申请号:US15466500

    申请日:2017-03-22

    Abstract: According to some aspects, a method of producing a permanent magnet shim configured to improve a profile of a B0 magnetic field produced by a B0 magnet is provided. The method comprises determining deviation of the B0 magnetic field from a desired B0 magnetic field, determining a magnetic pattern that, when applied to magnetic material, produces a corrective magnetic field that corrects for at least some of the determined deviation, and applying the magnetic pattern to the magnetic material to produce the permanent magnet shim. According to some aspects, a permanent magnet shim for improving a profile of a B0 magnetic field produced by a B0 magnet is provided. The permanent magnet shim comprises magnetic material having a predetermined magnetic pattern applied thereto that produces a corrective magnetic field to improve the profile of the B0 magnetic field.

    RADIO FREQUENCY COIL METHODS AND APPARATUS
    36.
    发明申请

    公开(公告)号:US20200337644A1

    公开(公告)日:2020-10-29

    申请号:US16926272

    申请日:2020-07-10

    Abstract: Aspects relate to providing radio frequency components responsive to magnetic resonance signals. According to some aspects, a radio frequency component comprises at least one coil having a conductor arranged in a plurality of turns oriented about a region of interest to respond to corresponding magnetic resonant signal components. According to some aspects, the radio frequency component comprises a plurality of coils oriented to respond to corresponding magnetic resonant signal components. According to some aspects, an optimization is used to determine a configuration for at least one radio frequency coil.

    Rotatable magnet methods and apparatus for a magnetic resonance imaging system

    公开(公告)号:US10698048B2

    公开(公告)日:2020-06-30

    申请号:US16393052

    申请日:2019-04-24

    Abstract: According to some aspects, a magnetic resonance imaging system comprising a B0 magnet configured to produce a B0 magnetic field for the magnetic resonance imaging system, the B0 magnet comprising at least one first B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, at least one second B0 magnet to produce a magnetic field to contribute to the B0 magnetic field for the magnetic resonance imaging system, wherein the at least one first B0 magnet and the at least one second B0 magnet are arranged relative to one another so that an imaging region is provided there between, a surface configured to support a patient anatomy within the imaging region, and a positioning member coupled to the B0 magnet and configured to allow the B0 magnet to be tilted to position the planar surface at a corresponding incline.

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