公开(公告)号：EP2967426A4

公开(公告)日：2017-05-17

申请号：EP14776085

申请日：2014-03-10

Applicant: INVIVO CORP

Inventor： BRADSHAW KENNETH

IPC: G01R33/34 ,  A61B5/055 ,  G01R33/3415 ,  G01R33/36

CPC classification number: A61B5/004 ,  A61B5/0555 ,  A61B5/4312 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/365

公开(公告)号：EP2817649A1

公开(公告)日：2014-12-31

申请号：EP13751507.8

申请日：2013-02-22

Applicant: The Trustees of Columbia University in the City of New York

Inventor： DUAN, Yunsuo ,  PETERSON, Bradley, S. ,  LIU, Feng ,  KANGARLU, Alayar

IPC: G01R33/36

CPC classification number: G01R33/36 ,  G01R33/3415 ,  G01R33/3621 ,  G01R33/365 ,  G01R33/48

Abstract: Arrangement, magnetic resonance imaging system and method can be provided, according to certain exemplary embodiments of the present disclosure. For example, a plurality of radio frequency (RF) coil elements can be utilized which can include at least one coil element that is coupled to and non-standard impedance matched with at least one preamplifier.

公开(公告)号：EP2589976A1

公开(公告)日：2013-05-08

申请号：EP12189898.5

申请日：2012-10-25

Applicant: Imris Inc.

Inventor： Zhu, Haoqin ,  Wang, Grace Fengqi

IPC: G01R33/3415 ,  G01R33/36 ,  G01R33/34

CPC classification number: G01R33/365 ,  G01R33/34007 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/3642

Abstract: A receive coil for MRI includes a stacked pair of coil elements to communicate the respective MR signals therein to the signal processing system in separate channels. This greatly increases image SNR and penetration depth and in parallel imaging. The coils are arranged in a stacked relationship so as to be at least partly and preferably wholly overlapped and lying in the same or closely adjacent planes. The coils include tuning capacitors to a common resonant frequency. The coils are connected by a conductor arranged such that the signals of the first and second coils are decoupled. The conductor can form a common portion of the coils including a capacitance of in the common portion arranged. The coils can be connected by two conductors one of which is a short and the other contains a capacitor. In both cases the connection conductors provide the decoupling.

Abstract translation: 用于MRI的接收线圈包括堆叠的一对线圈元件，以将各自的MR信号传送到单独信道中的信号处理系统。 这大大增加了图像信噪比和穿透深度以及并行成像。 线圈以堆叠的关系布置成至少部分地且优选地完全重叠并且位于相同或接近相邻的平面中。 线圈包括调谐电容器到共用谐振频率。 线圈由布置成使得第一和第二线圈的信号解耦的导体连接。 导体可以形成线圈的共同部分，包括布置的公共部分中的电容。 线圈可以由两根导体连接，其中一根短路，另一根包含一个电容。 在这两种情况下，连接导体提供去耦。

公开(公告)号：EP2577339A1

公开(公告)日：2013-04-10

申请号：EP11720883.5

申请日：2011-04-26

Applicant: Koninklijke Philips Electronics N.V. ,  Philips Intellectual Property & Standards GmbH

Inventor： FINDEKLEE, Christian

IPC: G01R33/36

CPC classification number: G01R33/3642 ,  G01R33/3415 ,  G01R33/365

Abstract: A radio-frequency coil assembly (18), for use in a magnetic resonance imaging system (10), includes a plurality of coil elements (18
n ). The coil elements (18
n ) are connected to a decoupling network (40) which includes a plurality of decoupling elements (40
n,x ) connected (via transmission lines) to pairs of coil elements (18
n , 18
x ) at corresponding ports (64
n ,64
x ) from which the coil can be fed. The decoupling elements (40
n,x ) compensate for mutual coupling between pairs of corresponding coil elements. An inductive coupling loop (51
n ), with a constant or adjustable mutual inductance, inductively couples the associated coil element (18
n ) to the corresponding decoupling network port (64
n ). Transmission lines (52
n ) electrically connect each inductive coupling loop (51
n ) to the decoupling network (40) at the corresponding port (64
n ). Each transmission line (52
n ) has an electrical length of
kλ /2 where
k =0,1,2,3... and λ is a wavelength of the excited and/or received resonance signals inside the transmission line.

公开(公告)号：EP2534499A1

公开(公告)日：2012-12-19

申请号：EP11708065.5

申请日：2011-02-07

Applicant: Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Inventor： FERRAND, Guillaume ,  LUONG, Michel ,  FRANCE, Alain

IPC: G01R33/34 ,  G01R33/36 ,  G01R33/422 ,  G01R33/345 ,  H01P5/10 ,  G01N24/08

CPC classification number: H01P5/10 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3456 ,  G01R33/3628 ,  G01R33/365 ,  G01R33/3685 ,  G01R33/422

Abstract: The present invention relates to a linear resonator (100) of a high-frequency antenna suitable for emitting a radiofrequency energisation signal and for receiving a radiofrequency relaxation signal, said linear resonator (100) comprising a radiating element (103) suitable for emitting a radiofrequency energisation signal and for receiving a radiofrequency relaxation signal. Said resonator also comprises: a balun circuit consisting of a power-supply line (133) and two coupling lines (131, 132); a substrate (120), consisting of a dielectric material, supporting said radiating element (103) which contains said balun circuit (130); two contact points (136, 137) connecting said balun circuit (130) to said radiating element (103), said contact points being formed by one of the ends of said coupling lines (131, 132) extending out of said substrate (120), the distance separating the two contact points (136, 137) being selected such as to ensure the impedance matching of said resonator (100); and a chip floorplan (111) separating said coupling lines (131, 132) from said radiating element (103, 303).

Abstract translation: 本发明涉及一种适用于发射射频激励信号和接收射频驰豫信号的高频天线的线性谐振器（100），所述线性谐振器（100）包括辐射元件（103），其适于发射射频 激励信号并用于接收射频弛豫信号。 所述谐振器还包括：由电源线（133）和两条耦合线（131,132）组成的平衡 - 不平衡转换器电路; 一个由电介质材料组成的衬底（120），支撑包含所述平衡 - 不平衡转换器电路（130）的所述辐射元件（103）; 将所述平衡 - 不平衡转换器电路（130）连接到所述辐射元件（103）的两个接触点（136,137），所述接触点由所述耦合线（131,132）的伸出所述基板（120）的一端形成， ，选择两个接触点（136,137）之间的距离以确保所述谐振器（100）的阻抗匹配; 和将所述耦合线（131,132）与所述辐射元件（103,303）分开的芯片平面布置图（111）。

公开(公告)号：EP2496953A1

公开(公告)日：2012-09-12

申请号：EP10773631.6

申请日：2010-11-05

Applicant: Albert-Ludwigs-Universität Freiburg

Inventor： PETER, Andreas ,  SCHONHARDT, Stefan ,  KORVINK, Jan

IPC: G01R33/3415 ,  G01R33/36

CPC classification number: G01R33/3415 ,  G01R33/34007 ,  G01R33/365 ,  Y10T29/49071

Abstract: The invention relates to a multi-channel coil array for use as a transceiver in magnetic resonance imaging (MRI), comprising a plurality of high frequency (HF) coils disposed next to one another, devices for electromagnetically decoupling the HF coils, coil elements which are applied onto a planar carrier element, which each form an individual element together with the carrier element, where the carrier elements (5) have a regular, equilateral polygonal outer contour, and a two-dimensional or three-dimensional structure of the entire coil array created by joining a plurality of individual elements to each other, where the coil elements are arranged on each carrier element (5) such that they result in a complete individual coil (2), respectively, and the shape of the individual coils (2) corresponds to the outer contour of the carrier element (5), characterized in that an individual coil (2) has a loop-shaped structure (1), which leads to a decoupling of individual coils (2) not immediately adjacent to each other when a plurality of individual elements are arranged. In this way, tedious and cost-intensive adjustment of the coils to each other can be dispensed with, the handling of multi-channel coil arrays of this type is simplified, and the costs for MRI measurements are lowered. In addition, the space requirement for adding new coils is reduced, and the modular design makes it possible to easily implement any three-dimensional or two-dimensional shape.

公开(公告)号：EP1852710A3

公开(公告)日：2009-09-23

申请号：EP07007609.6

申请日：2007-04-13

Applicant: Quality Electro Dynamics, LLC.

Inventor： Yang, Xiaoyu ,  Fujita, Hiroyuki ,  Zheng, Tsinghua

IPC: G01R33/36 ,  G01R33/3415

CPC classification number: G01R33/3415 ,  G01R33/365

Abstract: An MRI RF transmit system uses a plurality of RF transmit coils (51a, 51n), each being driven with separately controllable RF magnitude and phase. The magnitude and phase of each coil drive are separately and independently controlled so that the RF transmit coils act as if they are decoupled from each other. The controlled magnitude and phase values may be based on empirically derived information relating to self and mutual coupling of RF transmit coils.

公开(公告)号：EP2089733A1

公开(公告)日：2009-08-19

申请号：EP07853142.3

申请日：2007-11-20

Applicant: Varian, Inc.

Inventor： FINNIGAN, James P. ,  ZENS, Albert P.

IPC: G01R33/32 ,  A61B5/055

CPC classification number: G01R33/34 ,  G01R33/34092 ,  G01R33/3635 ,  G01R33/365

Abstract: A single RF port, multiply-resonant circuit comprises coupled resonant sub-circuits coupled through an adjustable reactive element exhibiting a dynamic range that includes a value of the reactive component of sufficient magnitude to produce an impedance producing substantial mutual isolation of the sub-circuits.

公开(公告)号：EP1721184A4

公开(公告)日：2009-03-25

申请号：EP05714507

申请日：2005-02-24

Applicant: CA NAT RESEARCH COUNCIL

Inventor： HOULT DAVID IAN

IPC: G01R33/36 ,  G01R33/3415 ,  G01R33/58

CPC classification number: G01R33/583 ,  G01R33/3415 ,  G01R33/365

Abstract: In nuclear magnetic resonance experiments, Cartesian electronic feedback is used to reduce substantially in transmission and/or reception the deleterious effects of sample-mediated and direct interactions between coils in an array of transmitting and/or receiving coils. The feedback is also used with single or multiple coils to maintain at essentially constant values the relationship between an input transmitter voltage and the magnetic resonance flip angle, and the relationship between transverse nuclear magnetisation and the strength of the free induction decay signal presented by a receiver for analysis, regardless of factors such as sample electrical conductivity.

公开(公告)号：EP1839065A2

公开(公告)日：2007-10-03

申请号：EP05857012.8

申请日：2005-11-22

Applicant: M2M Imaging Corp.

Inventor： DEVRIES, Jon T. ,  GAO, Erzhen ,  KUNIMOTO, Wallace

IPC: G01R33/34

CPC classification number: G01R33/34053 ,  G01R33/3403 ,  G01R33/34061 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/365

Abstract: A magnetic resonance imaging system (10) includes a primary magnet and a secondary magnet operable to produce magnetic fields within a sample being imaged. The MRI system further includes at least one RF coil (50) that is operable to receive electromagnetic frequencies from the sample. The RF coil is formed from tubing (221) that serves as a cooling conduit through which flows a cooling fluid provided by a cooling source. The cooling fluid cools the RF coils to improve imaging of the sample.