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    Magnetic resonance imaging apparatus and RF coil employed therein
    1.
    发明授权
    Magnetic resonance imaging apparatus and RF coil employed therein 失效
    磁共振成像装置及其中使用的RF线圈

    公开(公告)号：US5559434A

    公开(公告)日：1996-09-24

    申请号：US516892

    申请日：1995-08-18

    申请人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

    发明人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

    IPC分类号： G01R33/34 ,  G01R33/36 ,  G01V3/00

    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。

    Magnetic resonance imaging apparatus and RF coil employed therein
    2.
    发明授权
    Magnetic resonance imaging apparatus and RF coil employed therein 失效
    磁共振成像装置及其中使用的RF线圈

    公开(公告)号：US5510714A

    公开(公告)日：1996-04-23

    申请号：US926517

    申请日：1992-08-10

    申请人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

    发明人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

    IPC分类号： G01R33/34 ,  G01R33/36 ,  G01V3/00

    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。

    Nuclear magnetic resonance apparatus
    5.
    发明授权
    Nuclear magnetic resonance apparatus 失效
    核磁共振装置

    公开(公告)号：US5280246A

    公开(公告)日：1994-01-18

    申请号：US793456

    申请日：1991-11-18

    申请人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshikuni Matsunaga ,  Ryuichi Suzuki

    发明人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshikuni Matsunaga ,  Ryuichi Suzuki

    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。

    RF probe
    7.
    发明授权
    RF probe 失效
    射频探头

    公开(公告)号：US5477145A

    公开(公告)日：1995-12-19

    申请号：US177393

    申请日：1994-01-05

    申请人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto

    发明人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto

    IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/36 ,  G01V3/00

    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。

    RF probe for nuclear magnetic resonance imaging (MRI) devices
    8.
    发明授权
    RF probe for nuclear magnetic resonance imaging (MRI) devices 失效
    用于核磁共振成像（MRI）装置的RF探针

    公开(公告)号：US5453692A

    公开(公告)日：1995-09-26

    申请号：US98816

    申请日：1993-07-29

    申请人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto ,  Hiroyuki Itagaki

    发明人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto ,  Hiroyuki Itagaki

    IPC分类号： G01R33/34 ,  G01V3/00

    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。

    Nuclear magnetic resonanace inspection apparatus and its method
    9.
    发明授权
    Nuclear magnetic resonanace inspection apparatus and its method 失效
    核磁共振检测仪及其方法

    公开(公告)号：US5384536A

    公开(公告)日：1995-01-24

    申请号：US33543

    申请日：1993-03-18

    申请人： Yoshiki Murakami ,  Tetsuhiko Takahashi ,  Etsuji Yamamoto

    发明人： Yoshiki Murakami ,  Tetsuhiko Takahashi ,  Etsuji Yamamoto

    IPC分类号： A61B5/055 ,  G01R33/28 ,  G01R33/36 ,  G01R33/20

    CPC分类号： G01R33/3692 ,  G01R33/28 ,  G01R33/3621

    摘要： This application describes a nuclear magnetic resonance inspection apparatus. In this apparatus, a nuclear magnetic resonance signal detected by a detection coil is wirelessly transmitted to a signal processing system. In another embodiment, the nuclear magnetic resonance signal is stored in a memory medium provided to the detection coil. This memory medium can be separated from the detection coil. The signal processing system reads out the nuclear magnetic resonance signal from the memory medium separated, and processes the signal.

    摘要翻译： 本申请描述了核磁共振检查装置。 在该装置中，由检测线圈检测出的核磁共振信号被无线发送到信号处理系统。 在另一个实施例中，核磁共振信号被存储在提供给检测线圈的存储介质中。 该存储介质可以与检测线圈分离。 信号处理系统从分离的存储介质读出核磁共振信号，并处理该信号。