公开(公告)号：US06850065B1

公开(公告)日：2005-02-01

申请号：US10205794

申请日：2002-07-26

申请人： Hiroyuki Fujita ,  Mark Xueming Zou

发明人： Hiroyuki Fujita ,  Mark Xueming Zou

IPC分类号： G01R33/341 ,  G01V3/00

CPC分类号： G01R33/3678

摘要： A RF receive coil system for imaging a breast on a human chest with a horizontal field MRI system includes a volume saddle coil adapted to be contoured about the chest; and a Helmholtz coil having a lower portion adapted to be contoured about the chest and an upper portion adapted to be above the chest The coils are operable in quadrature mode.

摘要翻译： 用于使用水平场MRI系统对人胸部的乳房进行成像的RF接收线圈系统包括适于围绕胸部轮廓的体积鞍座线圈; 以及亥姆霍兹线圈，其具有适于围绕胸部轮廓的下部和适于在胸部上方的上部。线圈可以正交模式操作。

公开(公告)号：US5699802A

公开(公告)日：1997-12-23

申请号：US536950

申请日：1995-09-29

申请人： Wilhelm Duerr

发明人： Wilhelm Duerr

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/422 ,  A61B5/055 ,  A61B5/415 ,  G01R33/34046 ,  G01R33/3678

摘要： In a mammography antenna arrangement for magnetic resonance examinations of a female breast, a conductor arrangement forms a closed circuit and surrounds a receptacle opening for the female breast. The receptacle opening lies in a surface that is essentially horizontally directed. Two arcuate conductor segments have their ends connected to the conductor arrangement via electrical connecting locations and surround an examination space that is fashioned for the acceptance of the female breast. The two conductor segments are respectively arranged in vertical, planes, the two planes being perpendicular to one another.

摘要翻译： 在用于女性乳房的磁共振检查的乳房照相天线装置中，导体装置形成闭合电路并围绕女性乳房的插座开口。 容器开口位于基本上水平定向的表面中。 两个弓形导体段的端部通过电气连接位置连接到导体装置，并且围绕着用于接受女性乳房的检查空间。 两个导体段分别布置在垂直的平面中，两个平面彼此垂直。

公开(公告)号：US5661400A

公开(公告)日：1997-08-26

申请号：US629170

申请日：1996-04-08

申请人： Erich Plies ,  Alejandro Valenzuela

发明人： Erich Plies ,  Alejandro Valenzuela

IPC分类号： G01R33/34 ,  A61B5/055 ,  G01R33/341 ,  H01F6/06 ,  G01V3/00

CPC分类号： G01R33/341 ,  G01R33/34023

摘要： An antenna for nuclear magnetic resonance tomography has at least one annulus antenna surrounded by a passive layer of superconductor material, so that an optimally uniform magnetic field and an optimally high signal-to-noise ratio are assured during operation.

摘要翻译： 用于核磁共振断层摄影的天线具有由超导体材料的无源层包围的至少一个环形天线，使得在操作期间确保最佳均匀的磁场和最佳高的信噪比。

公开(公告)号：US5502387A

公开(公告)日：1996-03-26

申请号：US294507

申请日：1994-08-23

申请人： Robert E. McGill

发明人： Robert E. McGill

IPC分类号： G01R33/36 ,  A61B5/055 ,  G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  H01F5/00 ,  G01R33/28

CPC分类号： G01R33/34084 ,  G01R33/34061 ,  G01R33/3671 ,  G01R33/3678 ,  G01R33/34007 ,  G01R33/3415 ,  G01R33/3628

摘要： A variable geometry coil system includes a single fixed horizontal coil and a vertically oriented pair of movable coils interconnected through an electronic matrix to allow for a multi-mode system which enables either the vertical pair or the horizontal coil to function alone or to enable a quadrature combination of the coils for optimum signal performance. The vertical coil pair includes two matched coils which are loaded to reduce their tuning sharpness so as to eliminate the need for clinical tuning prior to utilization. Signal losses incurred by the Q reduction are compensated for by including an integrated preamplifier at the signal output.

摘要翻译： 可变几何线圈系统包括单个固定水平线圈和通过电子矩阵互连的垂直取向的一对可动线圈，以允许多模式系统，其允许垂直对或水平线圈单独运行或使得正交 线圈的组合用于最佳信号性能。 垂直线圈对包括两个匹配的线圈，其被加载以降低其调谐锐度，以便在使用之前不需要临床调谐。 通过在信号输出端包括一个集成的前置放大器来补偿Q减少引起的信号损耗。

公开(公告)号：US5483159A

公开(公告)日：1996-01-09

申请号：US240192

申请日：1994-05-09

申请人： Teunis R. Van Heelsbergen

发明人： Teunis R. Van Heelsbergen

IPC分类号： A61B5/055 ,  G01N24/08 ,  G01R33/34 ,  G01R33/341 ,  G01R33/36 ,  G01R33/28

CPC分类号： G01R33/3678 ,  G01R33/34007 ,  G01R33/34046 ,  G01R33/34053 ,  G01R33/34061 ,  G01R33/3628

摘要： A quadrature coil system which includes the following elements. (1) First and second electric main conductors which are situated at a distance from one another in a first plane and a second plane, respectively, and each of which is formed as a loop with an opening, the main conductors having mainly the same orientation. (2) First and second connection conductors, each of which constitutes an electric connection between the free ends of the first and second main conductors, which free ends are situated to corresponding sides of the opening. (3) An electric connection device which is connected to the conductors so that first and second sets of turns are formed which are suitable to generate and/or receive first and second magnetic fields, respectively, which are mutually orthogonally directed. (a) There is provided at least one third connection conductor which constitutes an electric connection between a point on the first main conductor, being situated between the two free ends, and a corresponding point on the second main conductor; (b) each of the first and second connection conductors consist of substantially equal first and second connection conductor portions, the first connection conductor portions being connected to the free ends of the first main conductor and the second connection conductor portions being connected to the free ends of the second main conductor; (c) the four ends of the first and second connection portions are electrically connected, via an electric connection network, to one another and to the electric connection device.

摘要翻译： 正交线圈系统，包括以下元件。 （1）分别在第一平面和第二平面中彼此相隔一定距离的第一和第二电主导体，并且每个主导体形成为具有开口的环，主导体具有主要相同的取向 。 （2）第一和第二连接导体，每个连接导体构成第一和第二主导体的自由端之间的电连接，该自由端位于开口的相应侧面。 （3）一种电连接装置，其连接到导体，使得形成第一和第二组匝，其适合于分别相互正交地产生和/或接收第一和第二磁场。 （a）提供至少一个第三连接导体，其构成位于第一主导体之间的位于两个自由端之间的点与第二主导体上的对应点之间的电连接; （b）第一和第二连接导体中的每一个由基本相同的第一和第二连接导体部分组成，第一连接导体部分连接到第一主导体的自由端，第二连接导体部分连接到自由端 的第二主导体; （c）第一和第二连接部分的四个端部经由电连接网络彼此电连接到电连接装置。

公开(公告)号：US5389880A

公开(公告)日：1995-02-14

申请号：US85742

申请日：1993-06-30

申请人： Issei Mori

发明人： Issei Mori

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/56 ,  G01R33/20

CPC分类号： G01R33/34061 ,  G01R33/3678 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/3628 ,  G01R33/56

摘要： Four QD surface coil assemblies each constituted by an 8-shaped coil and a rectangular coil are one-dimensionally arranged under the spine array of a patient in the direction of the body axis of the patient. Each 8-shaped coil senses an RF magnetic field in an x direction near the spine array of the patient, and each rectangular coil senses an RF magnetic field in a y direction. Outputs from the 8-shaped coils and the rectangular coils are input to 90.degree. hybrid combiner circuits through pre-amplifiers, the phase of any one of the outputs is shifted by 90.degree., and then the outputs are added to each other. Outputs from the 90.degree. hybrid combiner circuits are supplied as raw data, through receiver/data acquisition systems, to a data processing unit (computer). In the data processing unit, raw data are two-dimensionally Fourier-transformed to form image signals p.sub.i (x,y,z) (i=1 to 4). The signals p.sub.1 (x,y,z) are squared, the sum of p.sub.i (x,y,z) is calculated with respect to i, and finally, the square root of the sum is calculated to obtain an image.

摘要翻译： 四个由8形线圈和矩形线圈构成的QD表面线圈组件被一维地布置在患者的脊柱阵列的下面，沿着患者体轴方向。 每个8形线圈感测靠近患者脊柱阵列的x方向上的RF磁场，并且每个矩形线圈在y方向上感测RF磁场。 8线圈和矩形线圈的输出通过前置放大器输入到90°混合组合电路，任一个输出的相位偏移90°，然后将输出相加。 来自90°混合组合器电路的输出作为原始数据通过接收器/数据采集系统提供给数据处理单元（计算机）。 在数据处理单元中，原始数据被二维傅里叶变换以形成图像信号pi（x，y，z）（i = 1至4）。 信号p1（x，y，z）是平方的，相对于i计算pi（x，y，z）的和，最后计算和的平方根以获得图像。

公开(公告)号：US5317266A

公开(公告)日：1994-05-31

申请号：US974120

申请日：1992-11-10

申请人： Ralph Meissner

发明人： Ralph Meissner

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/20

CPC分类号： G01R33/341 ,  G01R33/3415

摘要： A local antenna for transmitting and/or receiving radio frequency signals in a nuclear magnetic resonance imaging apparatus includes first and second sub-antennas which are axially spaced from each other. The sub-antennas each are composed of at least one conductor turn. An electrical series circuit is formed of the first sub-antenna, a capacitive element for shortening the path length effective for the radio frequency signal and of the second sub-antenna. The two sub-antennas have the same winding direction. A capacitor is connected in parallel with the series circuit. The respective capacitance values of the series capacitive element and the parallel capacitor are approximately the same. For constructing a local antenna system especially suitable for mammography, two such local antennas are arranged side-by-side and are electrically connected in parallel. The series capacitive elements of the two local antennas face each other.

摘要翻译： 用于在核磁共振成像设备中发送和/或接收射频信号的本地天线包括彼此轴向间隔开的第一和第二子天线。 子天线每个由至少一个导体转弯组成。 电串联电路由第一子天线形成，电容元件用于缩短对射频信号和第二子天线有效的路径长度。 两个子天线具有相同的卷绕方向。 电容器与串联电路并联连接。 串联电容元件和并联电容器的各自的电容值大致相同。 为了构建特别适用于乳房X线照相术的本地天线系统，两个这样的本地天线并排设置并联并联。 两个本地天线的串联电容元件彼此面对。

公开(公告)号：US5276398A

公开(公告)日：1994-01-04

申请号：US929900

申请日：1992-08-11

申请人： Richard S. Withers ,  Guo-Chun Liang

发明人： Richard S. Withers ,  Guo-Chun Liang

IPC分类号： G01R33/341 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36 ,  H01F5/00 ,  H01F6/00 ,  G01V3/00

CPC分类号： G01R33/3628 ,  G01R33/34 ,  G01R33/34007 ,  G01R33/34023 ,  G01R33/34092 ,  Y10S505/844

摘要： A magnetic resonance probe coil is fabricated using a superconductive material for the coil. Three distinct embodiments are described: a single-layer coil with no crossovers; a dual-film coil wherein the capacitors are formed through an intermediate dielectric layer; a single-layer coil incorporating a superconducting crossover. All of the embodiments are designed to take advantage of the properties of the superconducting material to achieve very high quality factors (Q) of tens of thousands to over a million. The superconductor is patterned into a spiral design to achieve self-resonance at a desired frequency in the range of 1 to 1000 MHz and the device operates at temperatures higher than 30 K. A broadband matching network is also disclosed which, when operated in conjunction with the superconducting magnetic resonance probe coil, allows operation over a wide range of frequencies while maintaining extremely low loss.

摘要翻译： 使用用于线圈的超导材料制造磁共振探针线圈。 描述了三个不同的实施例：没有交叉的单层线圈; 一种双电影线圈，其中电容器通过中间介质层形成; 包含超导交叉的单层线圈。 所有实施例被设计为利用超导材料的性质来实现数万到超过一百万的非常高的质量因子（Q）。 将超导体图案化为螺旋设计，以在1至1000MHz的范围内以期望的频率实现自谐振，并且器件在高于30K的温度下工作。还公开了宽带匹配网络，其与 超导磁共振探针线圈允许在宽范围的频率下工作，同时保持极低的损耗。

公开(公告)号：US5241272A

公开(公告)日：1993-08-31

申请号：US933735

申请日：1992-08-24

申请人： Axel Friedrich

发明人： Axel Friedrich

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/341

CPC分类号： G01R33/3678

摘要： A local antenna system for generating and receiving circularly-polarized, high-frequency magnetic fields in a nuclear magnetic resonance imaging apparatus has two coil groups disposed to define an examination volume therebetween, with each coil group having two coils therein, with each coil having a middle axis disposed at an angle substantially less than 90.degree. relative to the middle axis of the other coil in that group. The coil groups are disposed relative to the examination volume so that each coil in a coil group has a diagonally disposed counterpart coil in the other coil group. When the diagonally coils are respectively fed with currents which are phase-shifted by 90.degree. relative to each other, they respectively generate circularly-polarized high-frequency magnetic fields in the examination volume which are in-phase. In a reception mode, the signals induced in the diagonally disposed coils are superimposed in-phase.

摘要翻译： 用于在核磁共振成像设备中产生和接收圆偏振的高频磁场的本地天线系统具有两个线圈组，其设置成限定其间的检查体积，每个线圈组在其中具有两个线圈，每个线圈具有 中间轴相对于该组中的另一个线圈的中间轴线以大致小于90度的角度设置。 线圈组相对于检查体积布置，使得线圈组中的每个线圈在另一线圈组中具有对角设置的配对线圈。 当对角线圈分别馈入相对于彼此相移90度的电流时，它们分别产生同相的检查体积中的圆偏振高频磁场。 在接收模式中，在对角设置的线圈中感应的信号是同相的。

公开(公告)号：US5160891A

公开(公告)日：1992-11-03

申请号：US609779

申请日：1990-11-07

申请人： Hanan Keren

发明人： Hanan Keren

IPC分类号： G01R33/341 ,  G01R33/3415

CPC分类号： G01R33/3678 ,  G01R33/3415

摘要： Receiver circuitry for a surface coil array used in magnetic resonance diagnostic systems, said circuitry minimizes reflections and thus relaxes the prior art necessity for balancing the individual receiver channel for each array by obtaining quadrature signals from the acquired signals in processing circuitry located as close as possible process-wise to the display equipment.

摘要翻译： 用于磁共振诊断系统中的表面线圈阵列的接收器电路，所述电路使反射最小化，并因此松弛了现有技术的必要性，以通过从处理电路中获取的信号获得正交信号，该信号位于尽可能靠近的位置 过程到显示设备。