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公开(公告)号：US5510714A
公开(公告)日：1996-04-23
申请号：US926517
申请日：1992-08-10
CPC分类号： G01R33/34046 , G01R33/3642 , G01R33/3657 , G01R33/3678
摘要： In a bird cage resonator, the axial length of rungs is changed between orthogonal elements. By doing this, the real view fields of orthogonal ports A and B in the sagittal direction are changed and the sensitivity difference between both view fields is reduced. For an object with an elliptical section to be inspected such as the human body, a remarkable difference in detection sensitivity between each orthogonal ports is eliminated and the receiving sensitivity of MRI apparatus employing the QD method is improved.
摘要翻译： 在鸟笼式谐振器中，梯级的轴向长度在正交元件之间变化。 通过这样做，矢状方向上的正交端口A和B的真实视场被改变，并且两个视场之间的灵敏度差减小。 对于具有诸如人体等待检查的椭圆形截面的物体，消除了每个正交端口之间的检测灵敏度的显着差异，并且提高了采用QD方法的MRI装置的接收灵敏度。
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公开(公告)号：US5477145A
公开(公告)日：1995-12-19
申请号：US177393
申请日：1994-01-05
CPC分类号： G01R33/3642 , G01R33/34046 , G01R33/3657
摘要： In an RF probe comprising a resonator and a pickup coil, the pickup coil is an 8-shaped coil, and a center portion of this pickup coil is constituted in such a manner that crossing coils become parallel to each other at the portion. The center portion where the coils of the pickup coil are parallel to each other is so disposed as to extend along, and in the vicinity of, a part of a conductor loop of the resonator.
摘要翻译： 在包括谐振器和拾取线圈的RF探针中，拾取线圈是8形线圈，并且该拾取线圈的中心部分以这样的方式构成，使得交叉线圈在该部分处彼此平行。 拾波器线圈的线圈彼此平行的中心部分被布置成沿着谐振器的导体环的一部分延伸并且在谐振器的导体环的一部分附近。
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3.发明授权Multiple-coil adopting a quadrature detection method applied thereto and a signal processing circuit employing the same in an MRI apparatus in a vertical magnetic system 失效采用应用正交检测方法的多线圈和在垂直磁系统中的MRI装置中采用该线圈的信号处理电路。
公开(公告)号：US5592088A
公开(公告)日：1997-01-07
申请号：US427868
申请日：1995-04-26
IPC分类号： G01R33/34 , G01R33/341 , G01R33/3415 , G01R33/36 , G01R33/48
CPC分类号： G01R33/34053 , G01R33/34061 , G01R33/3415 , G01R33/3621 , G01R33/3678
摘要： A probe for an MRI apparatus in a vertical magnetic field system including: an array coil which is formed by arranging a plurality of unit coils, which can be driven independently of one another, in a direction perpendicularly intersecting a direction of a static magnetic field; and a compensating coil which forms a magnetic field in a direction perpendicularly intersecting both a direction of a magnetic field formed by the array coil and the direction of the magnetic field, a signal detected by the array coil and a signal detected by the compensating coil being composed so as to be in phase with each other, thereby to be outputted.
摘要翻译： 一种用于垂直磁场系统中的MRI装置的探针，包括：阵列线圈，其通过在与静磁场方向垂直相交的方向上排列可彼此独立地驱动的多个单位线圈形成; 以及补偿线圈，其在与由阵列线圈形成的磁场的方向和磁场方向垂直相交的方向上形成磁场，由阵列线圈检测的信号和由补偿线圈检测的信号是 被构成为彼此同相，从而被输出。
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4.发明授权Multiple-coil adopting a quadrature detection method applied thereto and a signal processing circuit employing the same in an MRI apparatus in a vertical magnetic system 失效采用应用正交检测方法的多线圈和在垂直磁系统中的MRI装置中采用该线圈的信号处理电路。
公开(公告)号：US5457386A
公开(公告)日：1995-10-10
申请号：US981399
申请日：1992-11-25
IPC分类号： G01R33/34 , G01R33/341 , G01R33/3415 , G01R33/36 , G01R33/28
CPC分类号： G01R33/34053 , G01R33/34061 , G01R33/3415 , G01R33/3621 , G01R33/3678
摘要： A probe for an MRI apparatus in a vertical magnetic field system including: an array coil which is formed by arranging a plurality of unit coils, which can be driven independently of one another, in a direction perpendicularly intersecting a direction of a static magnetic field; and a compensating coil which forms a magnetic field in a direction perpendicularly intersecting both a direction of a magnetic field formed by the array coil and the direction of the magnetic field, a signal detected by the array coil and a signal detected by the compensating coil being composed so as to be in phase with each other, thereby to be outputted.
摘要翻译： 一种用于垂直磁场系统中的MRI装置的探针，包括：阵列线圈，其通过在与静磁场方向垂直相交的方向上排列可彼此独立地驱动的多个单位线圈形成; 以及补偿线圈，其在与由阵列线圈形成的磁场的方向和磁场方向垂直相交的方向上形成磁场，由阵列线圈检测的信号和由补偿线圈检测的信号是 被构成为彼此同相，从而被输出。
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公开(公告)号：US5280246A
公开(公告)日：1994-01-18
申请号：US793456
申请日：1991-11-18
IPC分类号： G01R33/3415 , G01V3/00
CPC分类号： G01R33/3415
摘要： A nuclear magnetic resonance apparatus receives nuclear magnetic resonance signals from an object under test with an RF probe which is an array of coils, implements down-frequency conversion with frequency converters for the received signals in multiple channels such that the frequency bands of the converted signals do not virtually overlap, filters the converted signals with band pass filters each operating to cut off frequency bands of other channels, hybridizes the filtered signals of multiple channels to form a hybridized signal, and produces an image from the hybridized signal.
摘要翻译： 核磁共振装置使用作为线圈阵列的RF探头从被测物体接收核磁共振信号，利用频率转换器对多个通道中的接收信号进行低频转换，使得转换信号的频带 不要虚地重叠，用带通滤波器对转换的信号进行滤波，每个带通滤波器各自操作以切断其他信道的频带，将多个信道的滤波信号杂交以形成杂交信号，并从杂交信号产生图像。
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6.发明授权Magnetic resonance imaging apparatus for detecting magnetic resonance signals by radio frequency receiving coils 失效用于通过射频接收线圈检测磁共振信号的磁共振成像装置
公开(公告)号：US5951474A
公开(公告)日：1999-09-14
申请号：US804925
申请日：1997-02-24
CPC分类号： G01R33/3415 , G01R33/34061 , G01R33/3678
摘要： RF receiving coil device used in a magnetic resonance imaging apparatus capable of acquiring a tomographic image of an object under examination positioned in a static magnetic field along a predetermined direction including quadrature detection coils for detecting an MR signal component along a direction perpendicular to a body axis direction of the object under examination and also perpendicular to a direction of the static magnetic field, and for detecting another MR-signal component along the body axis direction.
摘要翻译： RF接收线圈装置，其用于可以沿着预定方向获取位于静态磁场中的检查对象的断层图像，所述磁共振成像装置包括正交检测线圈，用于沿垂直于体轴的方向检测MR信号分量 检测对象的方向，也垂直于静磁场的方向，并且用于检测沿着身体轴线方向的另一个MR信号分量。
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公开(公告)号：US5559434A
公开(公告)日：1996-09-24
申请号：US516892
申请日：1995-08-18
CPC分类号： G01R33/34046 , G01R33/3642 , G01R33/3657 , G01R33/3678
摘要： An MRI RF coil including first and second ring elements having a plurality of peripheral segments connected in ring shape which are apart from each other along a common vertical axial line. The RF coil also includes a plurality of axial conductive segments for connecting the first and second ring elements electrically to each other at the contacts of the plurality of peripheral segments with a plurality of current loops being formed by neighboring axial conductive segments and two peripheral segments connected thereby. Further, at least one control signal feeding point is positioned at any one of the peripheral segments of the first or second ring elements.
摘要翻译： 一种MRI RF线圈，其包括第一和第二环形元件，所述第一和第二环形元件具有连接成环形的多个周边段，它们沿着共同的垂直轴线彼此分开。 RF线圈还包括多个轴向导电段，用于在多个周边段的触点处将第一和第二环形元件彼此电连接，多个电流环由相邻的轴向导电段形成，并且两个外围段连接 从而。 此外，至少一个控制信号馈送点位于第一或第二环形元件的任何一个外围段上。
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8.发明授权RF probe which can vary distance between receiving coils which face each other 失效RF探头可以改变彼此面对的接收线圈之间的距离
公开(公告)号：US5552707A
公开(公告)日：1996-09-03
申请号：US297060
申请日：1994-08-29
CPC分类号： G01R33/34084 , G01R33/34061 , G01R33/365 , G01R33/3628
摘要： An RF probe including: two coils for detecting MR signals which are arranged at positions which face each other at a predetermined distance; an apparatus for changing a distance between those coils; and an apparatus for reducing a high frequency coupling between the two coils which is caused due to a change in distance between the coils, in accordance with the distance between the coils.
摘要翻译： 一种射频探针，包括：用于检测MR信号的两个线圈，其布置在彼此面对预定距离的位置; 用于改变这些线圈之间距离的装置; 以及用于根据线圈之间的距离减小由于线圈之间的距离的变化而导致的两个线圈之间的高频耦合的装置。
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公开(公告)号：US5489847A
公开(公告)日：1996-02-06
申请号：US252624
申请日：1994-06-01
申请人： Takayuki Nabeshima , Tetsuhiko Takahashi , Yoshikuni Matsunaga , Etsuji Yamamoto , Kageyoshi Katakura
发明人： Takayuki Nabeshima , Tetsuhiko Takahashi , Yoshikuni Matsunaga , Etsuji Yamamoto , Kageyoshi Katakura
CPC分类号： G01R33/34053 , G01R33/3415 , G01R33/365 , G01R33/3678 , G01R33/3628
摘要： An RF probe for MRI, in which a plurality of unit coils including conductive loops having resonance capacitors and inductors connected with the conductive loops in series are arranged so as to be distant from each other with a predetermined distance, electromagnetic coupling being produced between at least two inductors to remove electromagnetic coupling between the unit coils.
摘要翻译： 一种用于MRI的RF探针，其中包括具有谐振电容器的导电回路和串联的导电回路的电感器的多个单位线圈布置成彼此远离预定距离，至少在至少 两个电感器去除单元线圈之间的电磁耦合。
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公开(公告)号：US5453692A
公开(公告)日：1995-09-26
申请号：US98816
申请日：1993-07-29
CPC分类号： G01R33/3415 , G01R33/34046 , G01R33/365
摘要： An RF probe for an MRI device including a plurality of hollow cylindrical resonators arranged in series such that the respective axes of the resonators align substantially in a z-axis direction of a three dimensional orthogonal coordinate system, radio frequency power signal supply/reception pickup coils to/from the respective resonators; and loop coils situated riding on two adjacent resonators in x- and y-axis directions, and an electromagnetic shield which surrounds the hollow cylindrical resonators, pickup coils and loop coils and grounded with respect to radio frequency.
摘要翻译： 一种用于MRI装置的RF探针，其包括串联布置的多个中空圆柱形谐振器，使得谐振器的各个轴线基本上在三维正交坐标系的z轴方向上对准，射频功率信号供应/接收拾取线圈 来自相应的谐振器; 以及围绕x和y轴方向的两个相邻谐振器上的环形线圈，以及围绕中空圆柱形谐振器，拾取线圈和环形线圈并相对于射频接地的电磁屏蔽。
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