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51 条记录 (耗时 0.017 秒)

    Electrical circuit in the magnetic field of an MR apparatus
    4.
    发明申请
    Electrical circuit in the magnetic field of an MR apparatus 有权
    MR设备磁场中的电路

    公开(公告)号：US20140139221A1

    公开(公告)日：2014-05-22

    申请号：US14072826

    申请日：2013-11-06

    申请人： BRUKER BIOSPIN AG

    发明人： Arthur Schwilch ,  Daniel Marek ,  Martin Luke

    IPC分类号： G01R33/32

    CPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/34015 ,  G01R33/3621 ,  G01R33/3628 ,  G01R33/3657

    摘要： An electrical circuit with one or more semiconductor components (10) is characterized in that at least one semiconductor junction of at least one of the semiconductor components of the electrical circuit is disposed such that the average direction of motion of the charge carriers in the semiconductor junction is essentially parallel to the lines of force of the magnetic field B0, wherein the corresponding semiconductor component is disposed directly on a substrate (12), which is made of a material with good thermal conduction properties. In this way, undistorted characteristics of the semiconductor component used can be ensured despite the very strong magnetic field and the low operating temperatures.

    摘要翻译： 具有一个或多个半导体部件（10）的电路的特征在于，电路的至少一个半导体部件的至少一个半导体结设置成使得半导体结中的载流子的平均运动方向 基本上平行于磁场B0的力线，其中相应的半导体部件直接设置在由具有良好导热性能的材料制成的基板（12）上。 以这种方式，尽管存在非常强的磁场和低的工作温度，但是可以确保使用的半导体部件的未失真特性。

    Coil System for a Magnetic Resonance Tomography System
    5.
    发明申请
    Coil System for a Magnetic Resonance Tomography System 有权
    用于磁共振层析成像系统的线圈系统

    公开(公告)号：US20130331269A1

    公开(公告)日：2013-12-12

    申请号：US13915486

    申请日：2013-06-11

    申请人： Marijn Pieter Oomen ,  Robert Rehner ,  Peter van Haßelt

    发明人： Marijn Pieter Oomen ,  Robert Rehner ,  Peter van Haßelt

    IPC分类号： G01R33/34

    CPC分类号： G01R33/34023 ,  F17C7/00 ,  F17C7/02 ,  F17C9/00 ,  G01R33/34015 ,  G01R33/3403 ,  G01R33/3415

    摘要： A coil system for a magnetic resonance tomography system includes a plurality of coils for sending and/or receiving high-frequency signals. The plurality of coils is disposed in a receiving chamber between a tomography magnet and a lining of an opening in the tomography magnet and may be cooled by a cooling apparatus. When the coil system is in an operating state, the receiving chamber is filled with a cryogenic cooling medium.

    摘要翻译： 用于磁共振断层摄影系统的线圈系统包括用于发送和/或接收高频信号的多个线圈。 多个线圈被布置在断层摄影磁体和层析成像磁体中的开口的衬里之间的接收室中，并且可以由冷却装置冷却。 当线圈系统处于操作状态时，接收室中充满低温冷却介质。

    Suspended substrate circuits and nuclear magnetic resonance probes utilizing same
    6.
    发明授权
    Suspended substrate circuits and nuclear magnetic resonance probes utilizing same 失效
    悬浮衬底电路和利用其的核磁共振探针

    公开(公告)号：US08587314B2

    公开(公告)日：2013-11-19

    申请号：US13031907

    申请日：2011-02-22

    申请人： Sean T. Burns

    发明人： Sean T. Burns

    IPC分类号： G01R33/44

    CPC分类号： G01R33/3628 ,  G01R33/34007 ,  G01R33/34015 ,  G01R33/34092 ,  G01R33/3635

    摘要： A nuclear magnetic resonance (NMR) probe circuit assembly includes one or more probe circuits in signal communication with one or more respective sample coils configured for transmitting and/or receiving radio-frequency (RF) energy to and/or from a sample of interest. One or more of the probe circuits have a suspended substrate configuration in which variable capacitors share a common dielectric substrate that is separated from a ground plane by an air gap. Each variable capacitor includes an electrode that is movable by a user-actuated adjusting device. One or more of the probe circuits may have a multiply resonant or broadband configuration, and may have one or more individual channels. One or more of the variable capacitors enable tuning to resonant frequencies of selected nuclei. One or more other variable capacitors may enable impedance matching.

    摘要翻译： 核磁共振（NMR）探针电路组件包括一个或多个与一个或多个相应的采样线圈进行信号通信的探针电路，所述一个或多个相应的采样线圈被配置用于向感兴趣的样本发射和/或接收射频（RF）能量和/或从感兴趣的样本。 一个或多个探针电路具有悬置的衬底配置，其中可变电容器共享通过气隙与接地平面分离的公共电介质衬底。 每个可变电容器包括可由用户致动的调节装置移动的电极。 探头电路中的一个或多个可以具有多重谐振或宽带配置，并且可以具有一个或多个单独信道。 一个或多个可变电容器使得能够调谐到所选核的谐振频率。 一个或多个其它可变电容器可以实现阻抗匹配。

    NMR CryoMAS probe for high-field wide-bore magnets
    7.
    发明授权
    NMR CryoMAS probe for high-field wide-bore magnets 有权
    用于高场宽孔磁体的NMR CryoMAS探头

    公开(公告)号：US07915893B2

    公开(公告)日：2011-03-29

    申请号：US12518946

    申请日：2007-11-18

    申请人： Siddarth Shevgoor ,  F David Doty

    发明人： Siddarth Shevgoor ,  F David Doty

    IPC分类号： G01V3/00

    CPC分类号： G01R33/307 ,  G01R33/31 ,  G01R33/34015 ,  G01R33/34092

    摘要： All critical circuit components, including the sample coils, are located along with the spinner assembly in a region that may be evacuated to high vacuum for thermal insulation and high-voltage operation. A hermetically sealed spinner assembly simultaneously satisfies the requirements of hermeticity, low total emissivity, rf compatibility, spinning performance, magnetic compatibility, and high filling factor by utilizing metal construction except for the central region near the rf sample coils. Hence, it is possible to maintain high vacuum in the region external to the MAS spinner assembly even over a broad range of bearing and drive gas temperatures. A bundle of optical fibers is provided for tachometry for spin rates up to 60 kHz. The use of alumina disc capacitors allows the noise contributions from the most critical capacitors to be reduced to a minor fraction of the total and simplifies high voltage operation.

    摘要翻译： 包括样品线圈在内的所有关键电路部件与旋转器组件一起位于可以被抽空到高真空以进行绝热和高压操作的区域中。 密封的旋转器组件通过利用除了rf样品线圈附近的中心区域之外的金属结构，同时满足气密性，低总发射率，低相容性，旋转性能，磁兼容性和高填充系数的要求。 因此，即使在宽范围的轴承和驱动气体温度下，也可以在MAS旋转器组件外部的区域中保持高真空。 提供一束光纤用于高达60 kHz的旋转速度的转速。 使用氧化铝盘式电容器可以将最关键的电容器的噪声贡献降低到总体的一小部分，并简化高压运行。