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    • 2. 发明申请
    • RF SCREEN FOR MRI SYSTEMS
    • MRI系统的RF屏幕
    • WO2014195277A1
    • 2014-12-11
    • PCT/EP2014/061418
    • 2014-06-03
    • KONINKLIJKE PHILIPS N.V.PHILIPS GMBH
    • FORTHMANN, PeterWUELBERN, Jan HendrikVERNICKEL, PeterFINDEKLEE, Christian
    • G01R33/422
    • G01R33/422
    • The invention relates to a magnet assembly for an MRI system with an improved RF screen. The RF screen is located between an RF coil assembly and a gradient coil assembly and comprises multiple layers of a screening foil. The screening foil comprises a dielectric foil and a plurality of conductive patches which are applied to a first side of the dielectric foil. By wrapping up the screening foil several times an RF screen comprising a plurality of capacitors is created, which effectively shields RF radiation from the gradient coil assembly. Further the shape and arrangement of the conductive patches is chosen such that the flow of eddy currents in the conductive patches caused by a gradient magnetic field is reduced.
    • 本发明涉及一种具有改进的射频屏幕的MRI系统的磁体组件。 RF屏幕位于RF线圈组件和梯度线圈组件之间,并且包括多层屏蔽箔。 屏蔽箔包括电介质箔和多个导电贴片,其被施加到电介质箔片的第一侧。 通过将屏蔽箔多次封装,产生包括多个电容器的RF屏幕,其有效地屏蔽来自梯度线圈组件的RF辐射。 此外,选择导电贴片的形状和布置,使得由梯度磁场引起的导电片中的涡流的流动减小。
    • 6. 发明申请
    • AMPLIFIER DEVICE FOR AN ANTENNA-LIKE MRI TRANSDUCER AND CORRESPONDING MRI APPARATUS
    • 放大器装置用于天线般的MRI传感器及相应的MRI装置
    • WO2017174533A1
    • 2017-10-12
    • PCT/EP2017/057904
    • 2017-04-04
    • KONINKLIJKE PHILIPS N.V.
    • LEUSSLER, ChristophVERNICKEL, Peter
    • G01R33/36H01P1/185H03H11/20
    • H03F1/565G01R33/3614G01R33/3628H01P1/185H03F3/19H03F3/245H03F2200/222H03F2200/387H03F2200/451H03H7/38
    • The invention relates to an amplifier device (14) adapted for an antenna-like transducer for MRI applications, especially for an RF coil, wherein the amplifier device (14) comprises at least one amplifier channel (16) including: an input connection device (18) for connecting an RF signal source (12); an output connection device (20) for connecting the antenna-like RF transducer; an RF amplifier unit (22); and an impedance matching circuit (24) configured to adapt the coupling of the RF amplifier unit (22) to the actually connected antenna-like RF transducer with regard to an actual load of the amplifier device (14), which load results from the combination of the antenna-like RF transducer and a person or sample interacting with the antenna-like RF transducer, wherein the impedance matching circuit (24) establishes an electric line (34) between the RF amplifier unit (22) and the antenna-like transducer with an adjustable line length. The invention further relates to the corresponding MRI apparatus.
    • 本发明涉及一种适用于MRI应用的天线状换能器,特别是用于RF线圈的放大器设备(14),其中放大器设备(14)包括至少一个放大器通道(16) ),包括:用于连接RF信号源(12)的输入连接装置(18); 输出连接装置(20),用于连接天线状RF转换器; 一个RF放大器单元(22); 以及阻抗匹配电路(24),其被配置为关于所述放大器设备(14)的实际负载来调整所述RF放大器单元(22)与所述实际连接的类天线RF传感器的耦合,所述负载由所述组合 其中阻抗匹配电路(24)在RF放大器单元(22)和天线状换能器(22)之间建立电线(34) 线长可调。 本发明还涉及相应的MRI设备。
    • 7. 发明申请
    • RHEOLOGY UNIT FOR MRI WITH INTEGRATED OSCILLATOR AND RF ANTENNA
    • 具有集成振荡器和射频天线的MRI的流变学单元
    • WO2014072895A1
    • 2014-05-15
    • PCT/IB2013/059876
    • 2013-11-04
    • KONINKLIJKE PHILIPS N.V.PHILIPS DEUTSCHLAND GMBH
    • WIRTZ, DanielVERNICKEL, PeterMAZURKEWITZ, PeterLEUSSLER, Christoph
    • G01R33/34G01R33/36G01R33/563
    • G01R33/34084A61B5/055G01R33/3415G01R33/3692G01R33/56358
    • The present invention provides a rheology module (200) for use in a magnetic resonance (MR) rheology imaging system (110), whereby the rheology module (200) is adapted to introduce mechanical oscillations into a subject of interest(120), comprising a housing(202), a mechanical oscillator unit(204), which extends at least partially outside the housing (202) and is movable relative to the housing(202), and a transducer (206) for moving the oscillator unit(204),whereby the rheology module (200) comprises at least one radio frequency (RF) antenna unit(210, 212), which comprises at least one RF coil(214, 216).With the RF antenna device integrated into the rheology module, an antenna placement close to a region of interest (ROI) can be achieved to improve the MR imaging capabilities of a MR rheology imaging system. Thus, imaging of the ROI can be performed more efficiently. Furthermore, connection and cabling can be facilitated, since only one module has to be connected to generate the oscillation and to operate the RF antenna device.
    • 本发明提供一种用于磁共振(MR)流变学成像系统(110)的流变学模块(200),由此流变学模块(200)适于将机械振荡引入感兴趣的对象(120),包括 壳体(202),机械振荡器单元(204),其至少部分地延伸到壳体(202)外部并且可相对于壳体(202)移动;以及用于移动振荡器单元(204)的换能器(206) 由此流变学模块(200)包括至少一个射频(RF)天线单元(210,212),其包括至少一个RF线圈(214,216)。随着RF天线装置集成到流变模块中,天线 可以实现靠近感兴趣区域(ROI)的放置以改善MR流变学成像系统的MR成像能力。 因此,可以更有效地执行ROI的成像。 此外,由于仅必须连接一个模块以产生振荡并操作RF天线装置,所以可以促进连接和布线。