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1. 发明授权

US09983279B2 Radio frequency (RF) birdcage coil with separately controlled ring members and rungs for use in a magnetic resonance (MR) imaging system 有权
公开(公告)号：US09983279B2
公开(公告)日：2018-05-29
申请号：US14437137
申请日：2013-10-14
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Christoph Leussler , Jan Hendrik Wuelbern
IPC分类号： G01R33/34 , G01R33/36 , H01Q7/00 , G01R33/565
CPC分类号： G01R33/34076 , G01R33/3614 , G01R33/3628 , G01R33/365 , G01R33/5659 , H01Q7/00
摘要： A radio frequency (RF) antenna device (40) applies an RF field to an examination space (16) of a magnetic resonance (MR) imaging system (10). The RF antenna device (40) includes a plurality of rungs (42, 44) arranged substantially parallel and in an azimuthally substantially equally spaced relationship along an outside of a virtual cylinder (50) with a cylinder axis (52) running parallel to main directions of extension (48). At least one transversal antenna member (54) electromagnetically is coupled to at least one rung (42, 44) of the plurality of rungs (42, 44). The at least one transversal antenna member (54) is arranged within a plane substantially perpendicular to the main directions of extension (48) of the plurality of rungs (42, 44). At least one RF circuit (62, 64, 66) is provided for each rung (42, 44) of the plurality of rungs (42, 44) for mutual decoupling and for individually feeding RF power into the at least one transversal antenna member (54).

2. 发明申请

US20180074140A1 MAGNETIC RESONANCE IMAGING (MRI) COIL WITH PIN DIODE DECOUPLING CIRCUIT 审中-公开
公开(公告)号：US20180074140A1
公开(公告)日：2018-03-15
申请号：US15262595
申请日：2016-09-12
申请人： Quality Electrodynamics, LLC
发明人： Xiaoyu Yang , Tsinghua Zheng
IPC分类号： G01R33/36 , G01R33/34
CPC分类号： G01R33/3642 , G01R33/307 , G01R33/34 , G01R33/34069 , G01R33/34076 , G01R33/341 , G01R33/36 , G01R33/3607 , G01R33/3614 , G01R33/3621 , G01R33/3628 , G01R33/3635 , G01R33/365 , G01R33/3657
摘要： A magnetic resonance imaging (MRI) radio frequency (RF) coil comprising an LC circuit including at least one series capacitor, and a decoupling circuit connected in parallel to the LC circuit. The decoupling circuit is configured to decouple the MRI RF coil from one or more other MRI RF coils using passive decoupling upon the production of an induced voltage in the decoupling circuit, or to actively decouple the MRI RF coil from one or more other MRI RF coils upon the insertion of a DC bias into the decoupling circuit. The decoupling circuit includes a pair of fast switching PIN diodes including a first PIN diode connected antiparallel with a second PIN diode, the second PIN diode connected in series with a first capacitor. The decoupling circuit further includes an inductor connected in series with the pair of fast switching PIN diodes and the capacitor.

3. 发明申请

US20170254865A1 A MAGNETIC RESONANCE APPARATUS COMPRISING A PLASMA ANTENNA 审中-公开
公开(公告)号：US20170254865A1
公开(公告)日：2017-09-07
申请号：US15511389
申请日：2015-09-15
申请人： ACADEMISCH ZIEKENHUIS LEIDEN , HALEAKALA R&D, INC.
发明人： Sebastian Aussenhofer , Andrew Webb , Theodore Anderson , Fred Deyer
IPC分类号： G01R33/34 , H01Q1/26 , G01R33/48 , H01Q5/22 , G01R33/36 , G01R33/421
CPC分类号： G01R33/34007 , G01R33/3415 , G01R33/3635 , G01R33/365 , G01R33/3657 , G01R33/3858 , G01R33/421 , G01R33/4808 , H01J37/32018 , H01J37/32082 , H01J37/32192 , H01J37/32339 , H01J37/32917 , H01J37/32972 , H01Q1/26 , H01Q5/22 , H05H1/24
摘要： A magnetic resonance apparatus comprising: a magnetic system configured to provide a magnetic field throughout at least a portion of a cavity, the magnetic field based on magnetic-system-control-data; a transmitter antenna disposed at least partly within the cavity and configured to transmit radio-frequency-transmitted-signalling based on transmitter-control-data; and a receiver antenna disposed at least partly within the cavity and configured to receive radio-frequency-received-signalling representative of magnetic resonance interactions of at least one object, disposed within the portion of the cavity, with the magnetic field and the radio-frequency-transmitted-signalling; wherein, at least one of the transmitter antenna, the receiver antenna and the magnetic system comprises a plasma antenna, and the magnetic resonance imaging apparatus is configured to provide received-data representative of the radio-frequency-received-signalling, the received-data in combination with the magnetic-system-control-data and the transmitter-control-data suitable for providing magnetic resonance imaging and/or magnetic resonance spectroscopy of the at least one object.

4. 发明授权

US09684044B2 Magnetic resonance imaging apparatus and antenna device 有权
公开(公告)号：US09684044B2
公开(公告)日：2017-06-20
申请号：US14349424
申请日：2012-10-17
申请人： Hideta Habara , Yoshihisa Soutome , Hiroyuki Takeuchi , Hisaaki Ochi
发明人： Hideta Habara , Yoshihisa Soutome , Hiroyuki Takeuchi , Hisaaki Ochi
IPC分类号： G01R33/34 , G01R33/3415 , G01R33/345 , G01R33/36
CPC分类号： G01R33/34092 , G01R33/3415 , G01R33/3453 , G01R33/36 , G01R33/365
摘要： In order to provide a technique which can suppress coupling to homogenize the spatial distribution of an RF magnetic field and can improve penetration of the RF magnetic field into the subject, pad-like electric field conductors having a predetermined area are provided outside both ends of a rung conductor as a part of a configuration which forms a loop-like circuit and is driven as an antenna. An antenna device includes a sheet-like conductor, a rung conductor which is arranged at a predetermined distance from the sheet-like conductor, two electric field conductors which are arranged in both end portions of the rung conductor at a predetermined distance from the sheet-like conductor, and connection terminals which are transmission and reception terminals provided in the rung conductor and the sheet-like conductor. The rung conductor and the sheet-like conductor configure a loop circuit which resonates at a preset frequency.

5. 发明授权

US09520636B2 Linear resonator of a high-frequency antenna for a nuclear magnetic resonance imaging apparatus 有权
标题翻译：用于核磁共振成像装置的高频天线的线性谐振器
公开(公告)号：US09520636B2
公开(公告)日：2016-12-13
申请号：US13577557
申请日：2011-02-07
申请人： Guillaume Ferrand , Michel Luong , Alain France
发明人： Guillaume Ferrand , Michel Luong , Alain France
IPC分类号： H01P5/10 , G01R33/34 , G01R33/3415 , G01R33/345 , G01R33/28 , H01P1/203 , G01R33/36 , G01R33/422
CPC分类号： H01P5/10 , G01R33/34076 , G01R33/3415 , G01R33/3456 , G01R33/3628 , G01R33/365 , G01R33/3685 , G01R33/422
摘要： A linear resonator of a high-frequency antenna suitable for emitting a radiofrequency energisation signal and for receiving a radiofrequency relaxation signal, the linear resonator includes a radiating element to emit af radiofrequency energisation signal and receive a radiofrequency relaxation signal. The resonator also includes: a balun circuit including a power-supply line and two coupling lines; a substrate made of a dielectric material, supporting the radiating element which contains the balun circuit; two contact points connecting the balun circuit to the radiating element, the contact points being formed by one of the ends of the coupling lines extending out of the substrate, the distance separating the two contact points being selected so as to ensure the impedance matching of the resonator; and a chip floorplan separating the coupling lines from the radiating element.
摘要翻译：适用于发射射频激励信号和用于接收射频弛豫信号的高频天线的线性谐振器，所述线性谐振器包括发射射频激发信号并接收射频弛豫信号的辐射元件。谐振器还包括：包括电源线和两条耦合线的平衡 - 不平衡转换电路; 由介电材料制成的衬底，支撑包含平衡 - 不平衡转换电路的辐射元件; 将平衡不平衡转换电路连接到辐射元件的两个接触点，接触点由延伸出基板的耦合线的端部中的一个端部形成，分离两个接触点的距离被选择以确保阻抗匹配谐振器以及将耦合线与辐射元件分开的芯片平面图。

6. 发明申请

US20160291100A1 TRANSCEIVER COIL ARRAY FACILITATING MR-GUIDED PROCEDURES 审中-公开
标题翻译：收货线圈阵列，促进MR指导程序
公开(公告)号：US20160291100A1
公开(公告)日：2016-10-06
申请号：US14677700
申请日：2015-04-02
申请人： IMRIS, Inc.
发明人： Seunghoon Ha , Haoqin Zhu , Labros Petropoulos , Meir Dahan
IPC分类号： G01R33/34 , G01R33/48 , G01R33/28 , G01R33/385 , G01R33/36
CPC分类号： G01R33/3607 , G01R33/34046 , G01R33/365 , G01R33/3664 , G01R33/3678
摘要： Nuclear magnetic resonance (MR) imaging can include use of an electrical transceiver coil system comprising an array of segmented loops. The array can be arranged about a portion of an imaging subject and arranged to provide surgical access to a region of the imaging subject from at least one direction. The segmented loops can establish a volumetric radio frequency (RF) excitation field across a volume-of-interest associated with the imaging subject in response to the segmented loops receiving specified transmit phases providing a non-90-degree relative phase between segmented coil loops at adjacent ones of the segmented loops. All or at least some of the segmented loops can provide outputs indicative of an RF signal from the imaging subject, the RF signal elicited in response to RF excitation. The transceiver coil system can facilitate pre-operative, intra-operative, or post-operative MR imaging, such as facilitating access for a surgical procedure.
摘要翻译：核磁共振（MR）成像可以包括使用包括分段环阵列的电收发器线圈系统。阵列可以围绕成像对象的一部分布置，并且布置成从至少一个方向提供对成像对象的区域的手术进入。分段环路可以响应于分段环路接收指定的传输相位而在与成像对象相关联的感兴趣体积上建立体积射频（RF）激励场，从而在分段线圈环之间提供非90度相对相位，相邻的分段循环。所有或至少一些分段环路可以提供指示来自成像对象的RF信号的输出，RF信号响应于RF激励而引起。收发器线圈系统可以促进手术前，手术中或术后MR成像，例如促进外科手术的进入。

7. 发明授权

US09448297B2 Mode splitter/combiner for noise figure minimization and control of power in RF coil arrays 有权
标题翻译：模式分路器/组合器，用于噪声系数最小化和RF线圈阵列功率的控制
公开(公告)号：US09448297B2
公开(公告)日：2016-09-20
申请号：US14240520
申请日：2012-08-27
申请人： George Randall Duensing
发明人： George Randall Duensing
IPC分类号： A61B5/05 , G01R33/565 , G01R33/36 , H01Q3/26
CPC分类号： G01R33/56554 , G01R33/36 , G01R33/365 , H01Q3/26
摘要： A magnetic resonance (MR) system (10) minimizes noise for modes of an array of coils (261, 262, . . . , 26n). The system (10) includes an array of coils (261, 262, . . . , 26n) in which the coils of the array (261, 262, . . . 26n) share impedances. A splitter/combiner (30) receives a plurality of signals (S1; S2, . . . , Sn) from each of the coils (261, 262, . . . , 26n) and converts the plurality of signals (S1; S2, . . . , Sn) to a plurality of signals (S1; S2, . . . , Sn) which are compensated for the shared impedance. The splitter/combiner (30) splits the received signals (S1; S2, . . . , Sn) into components and combines components of like frequency and/or phase to create the impedance compensated signals (S1; S2, . . . , Sn). Each impedance compensated signal is amplified by a corresponding preamplifier (381, 382, . . . , 38n).
摘要翻译：磁共振（MR）系统（10）使线圈阵列（261,262 ...，26n）的模式的噪声最小化。系统（10）包括阵列阵列（261,262 ...，26n），其中阵列（261,262 ... ... 26n）的线圈共享阻抗。分路器/组合器（30）从每个线圈（261,262 ...，26n）接收多个信号（S1; S2，...，Sn）并将多个信号（S1; S2， ...，Sn）到补偿了共享阻抗的多个信号（S1; S2，...，Sn）。分路器/组合器（30）将接收的信号（S1; S2，...，Sn）分成分量并组合类似频率和/或相位的分量以产生阻抗补偿信号（S1; S2，...，Sn ）。每个阻抗补偿信号被相应的前置放大器（381,382，...，38n）放大。

8. 发明授权

US09354287B2 System and apparatus for receiving magnetic resonance (MR) signals from an imaging subject 有权
标题翻译：用于从成像对象接收磁共振（MR）信号的系统和装置
公开(公告)号：US09354287B2
公开(公告)日：2016-05-31
申请号：US11851961
申请日：2007-09-07
申请人： Robert S. Stormont , Dashen Chu
发明人： Robert S. Stormont , Dashen Chu
IPC分类号： A61B5/05 , G01R33/36 , A61B5/055
CPC分类号： G01R33/365 , A61B5/055 , G01R33/3621
摘要： An apparatus for receiving magnetic resonance (MR) signals emitted by an imaging subject includes a receiver coil configured to detect the MR signals and a frequency translating preamplifier coupled to the receiver coil. The frequency translating preamplifier is configured to amplify the MR signals and to convert a frequency of the MR signals to an intermediate frequency. The frequency translating preamplifier may include an amplifier having a predefined gain, a frequency filter configured to filter at least one predetermined frequency and a mixer configured to convert the frequency of the MR signals to the intermediate frequency.
摘要翻译：用于接收由成像对象发射的磁共振（MR）信号的装置包括被配置为检测MR信号的接收器线圈和耦合到接收器线圈的频率转换前置放大器。频率转换前置放大器被配置为放大MR信号并将MR信号的频率转换为中频。频率转换前置放大器可以包括具有预定增益的放大器，被配置为对至少一个预定频率进行滤波的频率滤波器和配置成将MR信号的频率转换为中频的混频器。

9. 发明申请

US20160022142A1 COIL SYSTEMS FOR MAGNETIC RESONANCE IMAGING 审中-公开
标题翻译：用于磁共振成像的线圈系统
公开(公告)号：US20160022142A1
公开(公告)日：2016-01-28
申请号：US14774992
申请日：2014-03-10
申请人： INVIVO CORPORATION
发明人： KENNETH BRADSHAW
IPC分类号： A61B5/00 , A61B5/055
CPC分类号： A61B5/004 , A61B5/0555 , A61B5/4312 , G01R33/34084 , G01R33/3415 , G01R33/365
摘要： A RF coil compression system for use with an MRI system configured to image a patient's breast is disclosed. In one embodiment, the compression system comprises a first compression plate comprising a first plurality of RF coil elements, which is positioned in a plane oriented orthogonal to a direction of the main magnetic field and the first RF coil elements having a reception sensitivity to a B1 field and is orthogonal to a main magnetic field of the MRI system. The compresses system may further comprise a second compression plate, configured to be positioned opposing the first compression plate and orthogonal to the superior-inferior direction, the second compression plate comprising a second plurality of RF coil elements, the second RF coil elements having a reception sensitivity to a B1 field oriented in a direction substantially orthogonal to the first direction and to the main magnetic field of the MRI system.
摘要翻译：公开了一种与配置成对患者乳房进行成像的MRI系统一起使用的RF线圈压缩系统。在一个实施例中，压缩系统包括第一压缩板，其包括第一多个RF线圈元件，该第一多个RF线圈元件位于与主磁场方向垂直的平面中，并且具有对B1的接收灵敏度的第一RF线圈元件并与MRI系统的主磁场正交。压缩系统还可以包括第二压缩板，其被配置为与第一压缩板相对并且与上下方向正交地定位，第二压缩板包括第二多个RF线圈元件，第二RF线圈元件具有接收对于在与MRI系统的主磁场大致正交的方向上取向的B1场的灵敏度。

10. 发明申请

US20150369886A1 SYSTEM AND METHOD FOR DECOUPLING MAGNETIC RESONANCE IMAGING RADIO FREQUENCY COILS WITH A MODULAR MAGNETIC WALL 审中-公开
标题翻译：用模块化磁场去除磁共振成像无线电频率线圈的系统和方法
公开(公告)号：US20150369886A1
公开(公告)日：2015-12-24
申请号：US14830502
申请日：2015-08-19
申请人： MRI INNOVATIONS
发明人： Ravi Menon , Mohamed Aboukhousa , Ian Robert Oliphant Connell , Kyle Michael Gilbert
IPC分类号： G01R33/36 , G01R33/341
CPC分类号： G01R33/365 , G01R33/3415
摘要： A system and method for decoupling radio frequency (“RF”) coils arranged in proximity to each other is provided. The decoupling is achieved using a magnetic wall that includes resonators arranged on an electrically insulating substrate. The magnetic wall is placed between the RF coils. When an electromagnetic field produced by one of the RF coils is incident on the magnetic wall, the magnetic wall acts to filter the incident electromagnetic field by providing a bandstop condition to the field responsible for coupling energy between coil elements. The magnetic wall is modular, and an array of such magnetic walls can be used to enclose individual RF coil elements, or sub-arrays of two or more RF coil elements.
摘要翻译：提供了一种用于去耦接近彼此布置的射频（“RF”）线圈的系统和方法。使用包括布置在电绝缘基板上的谐振器的磁性壁实现去耦。磁性壁放置在RF线圈之间。当由RF线圈中的一个产生的电磁场入射到磁壁上时，磁壁通过向负责耦合线圈元件之间的能量的场提供阻带状态来对入射的电磁场进行滤波。磁壁是模块化的，并且这种磁性壁的阵列可以用于封闭各个RF线圈元件或两个或更多个RF线圈元件的子阵列。

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