公开(公告)号：US5109198A

公开(公告)日：1992-04-28

申请号：US469916

申请日：1990-01-24

申请人： Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno ,  Munetaka Tsuda ,  Toshihiro Ishizuka

发明人： Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno ,  Munetaka Tsuda ,  Toshihiro Ishizuka

IPC分类号： G01R33/34

CPC分类号： G01R33/34046

摘要： In a nuclear magnetic resonance imaging apparatus including a first probe circuit for detecting magnetic flux in a first direction and a second probe circuit for detecting magnetic flux in a direction perpendicular to the first direction, the arm angle of conductor arms to form the first probe circuit and the arm angle of conductor arms to form the second probe circuit are different from each other.

摘要翻译： 在包括用于检测第一方向的磁通的第一探针电路和用于检测与第一方向垂直的方向上的磁通的第二探针电路的核磁共振成像装置中，形成第一探针电路的导体臂的臂角 并且形成第二探针电路的导体臂的臂角彼此不同。

公开(公告)号：US4875013A

公开(公告)日：1989-10-17

申请号：US162982

申请日：1988-03-02

申请人： Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno

发明人： Yoshiki Murakami ,  Etsuji Yamamoto ,  Masao Yabusaki ,  Hideki Kohno

IPC分类号： G01R33/343

CPC分类号： G01R33/343

摘要： A high-frequency coil of the type of slot resonator in which outer conductors that have wing portions at both ends thereof and that are divided, are formed on the cylindrical surface, and ring-like inner conductors are formed on the inside of the wing portions. The wing portions have a width different from the width of the inner conductors. The self resonance frequency of the coil is adjusted by adjusting the width which is smaller than the other width. Further, the neighboring tips of the wing portions are opposed to each other via an air gap. The self resonance frequency is also adjusted depending upon the position of the dielectric plate inserted in the gap.

摘要翻译： 在圆筒形表面上形成有槽谐振器类型的高频线圈，其中在其两端具有翼部并被分割的外导体，并且在翼部的内侧形成有环形的内导体 。 翼部的宽度不同于内导体的宽度。 通过调节小于另一个宽度的宽度来调节线圈的自谐振频率。 此外，翼部的相邻端部经由气隙彼此相对。 自谐振频率也根据插入间隙中的电介质板的位置来调节。

公开(公告)号：US4825163A

公开(公告)日：1989-04-25

申请号：US225781

申请日：1988-07-29

申请人： Masao Yabusaki ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Hideki Kohno

发明人： Masao Yabusaki ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Hideki Kohno

IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/20

CPC分类号： G01R33/3678 ,  G01R33/34076 ,  G01R33/422

摘要： A quadrature probe for nuclear magnetic resonance includes two sets of coils which are combined with an angle of 90.degree. therebetween. Four pieces of outer conductors and two pieces of ring-shaped inner conductors are capacitively coupled to each other through an insulator or an air gap. In the outer conductor(s) in at least one of a set of outer conductors disposed at positions symmetrical with respect to each other so as to form a first coil and a set of outer conductors disposed at positions symmetrical with respect to each other so as to form a second coil, a conductor member(s) for adjustment is attached in parallel to the arm portion(s) in that outer conductor(s) of that set. Alternatively, the arm portion(s) itself in that set is slidably attached to the wing portions in that set.

摘要翻译： 用于核磁共振的正交探针包括两组线圈，它们之间的角度为90°。 四条外导体和两片环形内导体通过绝缘体或气隙彼此电容耦合。 在设置在彼此对称的位置的一组外部导体中的至少一个中的外部导体中，以形成设置在彼此对称的位置处的第一线圈和一组外部导体，以便 为了形成第二线圈，用于调节的导体构件平行于该组的外导体中的臂部附接。 或者，该组中的臂部分本身可滑动地附接到该组中的翼部。

公开(公告)号：US5245285A

公开(公告)日：1993-09-14

申请号：US719994

申请日：1991-06-24

申请人： Toshihiro Ishizuka ,  Munetaka Tsuda ,  Masao Yabusaki ,  Yasuo Wada ,  Takayuki Shimizu

发明人： Toshihiro Ishizuka ,  Munetaka Tsuda ,  Masao Yabusaki ,  Yasuo Wada ,  Takayuki Shimizu

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

CPC分类号： G01R33/34076 ,  G01R33/3628 ,  G01R33/422

摘要： A quadrature detection device for magnetic resonance imaging includes a pair of probes each having a pair of first conductors with a vertical arm and wings formed at both ends of the vertical arm and guard rings disposed inside the wings to oppose them and predetermined capacitors. In each probe, the resonance characteristics of the probe has two peaks. Symmetry of the peak existing in the resonance frequency range is effected by spacing the peak existing in a frequency range other than the resonance frequency range apart from the former. Thus, uniformity of the resulting image can be improved. The drop of the Q value of the probe is prevented by shifting the former peak to a higher frequency range than the latter peak. Also, electric symmetry of the probe is maintained.

摘要翻译： 用于磁共振成像的正交检测装置包括一对探针，每个探针具有一对具有垂直臂的第一导体和形成在垂直臂的两端的翼和设置在翼内的防护环以与它们和预定的电容器相对。 在每个探针中，探针的共振特性有两个峰。 存在于谐振频率范围内的峰值的对称性是通过将存在于除了前者之外的谐振频率范围之外的频率范围内存在的峰值间隔来实现的。 因此，可以提高所得图像的均匀性。 通过将前一个峰值移动到比后一个峰值更高的频率范围来防止探测器的Q值的下降。 此外，保持探针的电对称性。

公开(公告)号：US4777443A

公开(公告)日：1988-10-11

申请号：US119489

申请日：1987-11-12

申请人： Masao Yabusaki ,  Etsuji Yamamoto ,  Takashi Onodera ,  Yukiko Ogura ,  Hideaki Nakane ,  Shigeru Matsui ,  Hideki Kohno

发明人： Masao Yabusaki ,  Etsuji Yamamoto ,  Takashi Onodera ,  Yukiko Ogura ,  Hideaki Nakane ,  Shigeru Matsui ,  Hideki Kohno

IPC分类号： G01R33/035 ,  G01R33/36 ,  G01R33/20

CPC分类号： G01R33/326 ,  G01R33/0358

摘要： Disclosed in a nuclear magnetic resonance (NMR) based inspection apparatus using an SQUID flux meter for detecting a small NMR signal, in which a receiving coil for receiving the NMR signal from an object is connected to a mixer, which mixes a reference high-frequency signal with the NMR signal so that the NMR signal is reduced to a low-frequency signal having a differential component of frequencies of both signals, and the low-frequency signal is applied to the input coil of the SQUID flux meter so that it is converted into a voltage signal. The mixer circuit includes Schottky diodes operative at a liquid helium temperature or Josephson junctions, and the portions of apparatus from the reception coil up to the SQUID flux meter are operated in a superconductive state at a liquid helium temperature.

摘要翻译： 在使用SQUID通量计检测小型NMR信号的基于核磁共振（NMR）的检查装置中公开了一种用于从物体接收NMR信号的接收线圈连接到混频器，该混频器将参考高频 用NMR信号进行信号，使得NMR信号被减少到具有两个信号的频率的差分分量的低频信号，并且低频信号被施加到SQUID通量计的输入线圈，使得其被转换 变成电压信号。 混频器电路包括以液氦温度或约瑟夫逊结操作的肖特基二极管，并且从接收线圈到SQUID通量计的装置部分在液氦温度下处于超导状态。

公开(公告)号：US5107216A

公开(公告)日：1992-04-21

申请号：US473428

申请日：1990-02-01

申请人： Masao Yabusaki ,  Etsuji Yamamoto ,  Hiroyuki Takeuchi ,  Hideki Kohno

发明人： Masao Yabusaki ,  Etsuji Yamamoto ,  Hiroyuki Takeuchi ,  Hideki Kohno

IPC分类号： G01R33/32 ,  A61B5/055 ,  G01R33/343 ,  G01R33/36

CPC分类号： G01R33/3657 ,  G01R33/343

摘要： In an imaging apparatus using the nuclear magnetic resonance, a solenoid coil and a slot-resonator coil are combined with each other so as to constitute a quadrature-phase detection probe. In order to operate the slot-resonator coil at low frequency, inductance is added to the slot-resonator coil. Further in order to cut the coupling between a transmitting coil and a receiving coil in a cross coil system, a capacitor together with the added inductance to form a resonant circuit is connected in parallel to the inductance. A favorable probe can be obtained in a vertical-magnetic field type imaging apparatus.

摘要翻译： 在使用核磁共振的成像装置中，螺线管线圈和缝隙谐振器线圈彼此组合以构成正交相位检测探针。 为了以低频操作缝隙谐振器线圈，电感被加到缝隙谐振器线圈上。 此外，为了切断交叉线圈系统中的发送线圈和接收线圈之间的耦合，电容器与附加的电感一起形成谐振电路并联连接到电感。 可以在垂直磁场型成像装置中获得良好的探针。

公开(公告)号：US4929881A

公开(公告)日：1990-05-29

申请号：US356423

申请日：1989-05-25

申请人： Masao Yabusaki ,  Etsuji Yamamoto ,  Hiroyuki Takeuchi ,  Hideki Kohno

发明人： Masao Yabusaki ,  Etsuji Yamamoto ,  Hiroyuki Takeuchi ,  Hideki Kohno

IPC分类号： A61B10/00 ,  A61B5/055 ,  G01R33/34 ,  G01R33/36

CPC分类号： G01R33/34046 ,  G01R33/3628 ,  G01R33/3657

摘要： There is provided a probe to detect a nuclear magnetic resonance signal in which each of a plurality of arms forming a current path of an Alderman-Grant type coil is divided into two conductor plates, the two conductor plates are connected by an inductor, and a resonance frequency is reduced by increasing the inductance of the current path.

摘要翻译： 提供了一种用于检测核磁共振信号的探针，其中形成Alderman-Grant型线圈的电流路径的多个臂中的每一个被分成两个导体板，两个导体板通过电感器连接， 通过增加电流路径的电感来减小谐振频率。

公开(公告)号：US5355885A

公开(公告)日：1994-10-18

申请号：US988889

申请日：1992-12-10

申请人： Munetaka Tsuda ,  Atsushi Takane ,  Masao Yabusaki

发明人： Munetaka Tsuda ,  Atsushi Takane ,  Masao Yabusaki

IPC分类号： A61B5/055 ,  G01R33/28

CPC分类号： G01R33/28

摘要： In an illuminating method for nuclear magnetic resonance inspection, the progress of inspection is visually informed to a patient so that the patient can easily and surely keep himself or herself at rest during a scanning period, thereby improving accuracy of the inspection and allowing the patient to feel more at ease. Control signals indicating the progress of inspection are supplied from a control circuit to an illumination control circuit. The illumination control circuit changes, based on the control signals, the intensity, color, etc. of light emitted from a magnet cavity illuminating panel in accordance with the progress of inspection. It is thus possible to visually inform the patient of the progress of inspection, improve accuracy of the inspection, and illuminate a magnetic field generating space for suppressing a feeling of uneasiness felt by the patient.

摘要翻译： 在用于核磁共振检查的照明方法中，视觉上向患者通知检查的进展，使得患者能够在扫描期间容易且可靠地保持自己的休息状态，从而提高检查的准确性并允许患者 感觉更放心 指示检查进度的控制信号从控制电路提供给照明控制电路。 照明控制电路根据控制信号，根据检查的进度，改变从磁体腔照明面板发射的光的强度，颜色等。 因此，可以将病人的检查进度视觉上通知病人，提高检查精度，照射用于抑制患者感觉到的不舒服感的产生空间的磁场。

公开(公告)号：US4875010A

公开(公告)日：1989-10-17

申请号：US174424

申请日：1988-03-28

申请人： Koichi Yokosawa ,  Etsuji Yamamoto ,  Hideaki Nakane ,  Masao Yabusaki ,  Yukiko Ogura

发明人： Koichi Yokosawa ,  Etsuji Yamamoto ,  Hideaki Nakane ,  Masao Yabusaki ,  Yukiko Ogura

IPC分类号： A61B5/055 ,  A61B10/00 ,  G01R33/035 ,  G01R33/32 ,  G01R33/36

CPC分类号： G01R33/326 ,  G01R33/0358

摘要： In a signal detecting circuit of, for example, an NMR apparatus, a signal transmission path transmits an AC magnetic flux signal to be superposed on a DC magnetic field whose strength does not change with time during a period of signal detection. The signal transmission path comprises a superconducting closed loop including a receiving coil receiving the AC magnetic flux signal, an input coil applying the received AC magnetic flux signal as an input to a flux meter, and a variable resistor replacing part of the superconducting closed loop and having its resistance value changed in relation to a change in the strength of the DC magnetic field.

摘要翻译： 在例如NMR装置的信号检测电路中，在信号检测期间，信号传输路径传输要叠加在强度不随时间变化的直流磁场上的交流磁通信号。 信号传输路径包括超导闭环，包括接收交流磁通信号的接收线圈，输入线圈将接收到的交流磁通信号作为输入馈送到通量计，以及替代部分超导闭环的可变电阻器，以及 其电阻值相对于直流磁场强度的变化而变化。