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28 条记录 (耗时 0.015 秒)

    ADJUSTING A FIELD DISTRIBUTION OF AN ANTENNA ARRANGEMENT OF A MAGNETIC RESONANCE SYSTEM
    2.
    发明申请
    ADJUSTING A FIELD DISTRIBUTION OF AN ANTENNA ARRANGEMENT OF A MAGNETIC RESONANCE SYSTEM 审中-公开

    公开(公告)号：US20190257899A1

    公开(公告)日：2019-08-22

    申请号：US16281080

    申请日：2019-02-20

    申请人： Siemens Healthcare GmbH

    发明人： Jürgen Nistler ,  Razvan Lazar

    IPC分类号： G01R33/36 ,  G01R33/58 ,  G01R33/10 ,  G01R33/34

    摘要： A method for adjusting a field distribution of an antenna arrangement of a magnetic resonance system is provided. The symmetry of the field distribution may be impaired by positional inaccuracy of the antenna arrangement in the magnetic resonance system. The antenna arrangement comprises oscillating circuit antenna elements and switching elements. Each of the oscillating circuit antenna elements is assigned a respective switching element of the switching elements. A respective switching element is configured to couple the assigned oscillating circuit antenna element operatively to the antenna arrangement in dependence on a status of the respective switching element. During the method, symmetry information on the field distribution in the antenna arrangement is measured, and the switching elements are automatically adjusted using the measured symmetry information, such that the symmetry of the field distribution in the interior of the antenna arrangement is increased.

    TRANSMITTING ANTENNA FOR A MAGNETIC RESONANCE DEVICE
    3.
    发明申请
    TRANSMITTING ANTENNA FOR A MAGNETIC RESONANCE DEVICE 审中-公开

    公开(公告)号：US20190257896A1

    公开(公告)日：2019-08-22

    申请号：US16277154

    申请日：2019-02-15

    申请人： Siemens Healthcare GmbH

    发明人： Jürgen Nistler

    IPC分类号： G01R33/34 ,  H01Q21/24 ,  G01R33/36

    摘要： A transmitting antenna for a magnetic resonance device includes a plurality of antenna conductors arranged spaced from one another circumferentially around a center line and extending parallel to the center line, and a screening element extending parallel to the center line and circumferentially encompassing the antenna conductors. For at least one pair of the antenna conductors, a radial distance between a first antenna conductor of the pair and the screening element is smaller than a radial distance between a second antenna conductor of the pair and the screening element, a width of the first antenna conductor is smaller in the circumferential direction than a width of the second antenna conductor in the circumferential direction, axial ends of the first antenna conductor are coupled together via a higher capacitance capacitor than axial ends of the second antenna conductor.

    FLAT ADJUSTABLE CAPACITOR FOR MAGNETIC RESONANCE SCANNER
    4.
    发明申请
    FLAT ADJUSTABLE CAPACITOR FOR MAGNETIC RESONANCE SCANNER 审中-公开

    公开(公告)号：US20190019620A1

    公开(公告)日：2019-01-17

    申请号：US16027685

    申请日：2018-07-05

    申请人： Siemens Healthcare GmbH

    发明人： Ludwig Eberler ,  Razvan Lazar ,  Volker Matschl ,  Jürgen Nistler ,  Martin Schramm

    IPC分类号： H01F27/42 ,  H01G5/16 ,  H01G5/40 ,  H01G5/013 ,  G01R33/34

    摘要： The disclosure relates to a compensation capacitor for an antenna of a magnetic resonance scanner and a corresponding antenna with a compensation capacitor. The compensation capacitor has a first electrode and a second electrode arranged in parallel. An insulation material configured to resist high voltages and a dielectric with low dielectric losses are arranged between the first and the second electrode. The second electrode and/or the dielectric may be moved relative to the first electrode such that a surface area of a projection of the surface of the first electrode along the surface normal of the first electrode to the surface of the second electrode and/or the dielectric is variable.

    METHOD AND APPARATUS FOR INTERFERENCE SUPPRESSION FOR MR WHOLE BODY ANTENNAS
    5.
    发明申请
    METHOD AND APPARATUS FOR INTERFERENCE SUPPRESSION FOR MR WHOLE BODY ANTENNAS 有权

    公开(公告)号：US20220137168A1

    公开(公告)日：2022-05-05

    申请号：US17519563

    申请日：2021-11-04

    申请人： Siemens Healthcare GmbH

    发明人： Jürgen Nistler ,  Markus Vester

    IPC分类号： G01R33/422

    摘要： A magnetic resonance tomography system that includes a transmitter for generating an excitation signal and a body coil for emitting the excitation signal, and a method for operation of the magnetic resonance tomography system are provided. The magnetic resonance tomography system has a patient tunnel, in which the body coil is arranged. The magnetic resonance tomography system also has a first transmission interference suppression antenna that is arranged between the body coil and an opening in the patient tunnel. The first transmission interference suppression antenna is configured to provide a spatial transmission characteristic that may be compared with the body coil.

    MR RADIO-FREQUENCY SHIELDING UNIT
    9.
    发明申请
    MR RADIO-FREQUENCY SHIELDING UNIT 审中-公开

    公开(公告)号：US20180364322A1

    公开(公告)日：2018-12-20

    申请号：US16007886

    申请日：2018-06-13

    申请人： Siemens Healthcare GmbH

    发明人： Ludwig Eberler ,  Jürgen Nistler ,  Markus Vester

    IPC分类号： G01R33/422 ,  G01R33/34

    CPC分类号： G01R33/422 ,  G01R33/34007 ,  H01Q1/526 ,  H01Q7/00

    摘要： A radio-frequency shielding unit for shielding a radio-frequency antenna unit of a magnetic resonance apparatus and a magnetic resonance apparatus are provided. The radio-frequency shielding unit includes a support layer, a first conducting layer, an insulating layer, and a second conducting layer. The first conducting layer is arranged between the support layer and the insulating layer, and the insulating layer is arranged between the first conducting layer and the second conducting layer.