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。

公开(公告)号：US5528145A

公开(公告)日：1996-06-18

申请号：US275348

申请日：1994-07-15

申请人： Satoshi Hirata ,  Yoshitaka Bito ,  Etsuji Yamamoto

发明人： Satoshi Hirata ,  Yoshitaka Bito ,  Etsuji Yamamoto

IPC分类号： G01R33/561 ,  G01R33/565 ,  G01R33/20

CPC分类号： G01R33/5615 ,  G01R33/5616 ,  G01R33/56527 ,  G01R33/56554

摘要： A high-speed magnetic resonance spectroscopic imaging method for obtaining information relating to an object placed in a space by irradiating the object placed in the space applied with a static magnetic field and field gradients in three different directions so as to excite a nuclear spin in the object. At least one of the field gradients is applied while inverting a sign thereof periodically and a magnetic resonance signal generated by excitation of the nuclear spin is measured. A Fourier transform is applied to the measured magnetic resonance signal thereby to obtain a chemical shift image and a measurement spectral bandwidth is set to a value not larger than a frequency difference between two different chemical shifts having frequencies remotest from each other among a plurality of chemical shifts intended to be measured, the measurement spectral bandwidth being determined by a reciprocal of an inversion period of the field gradient which is applied while inverting a sign thereof periodically. The method enables setting of spatial resolution and spectral bandwidth independently.

摘要翻译： 一种高速磁共振光谱成像方法，用于通过照射放置在施加有三个不同方向的静磁场和场梯度的空间中的物体来获得与放置在空间中的物体相关的信息，以便激发在 目的。 应用场梯度中的至少一个，同时周期性地反转其符号，并且测量由核自旋的激发产生的磁共振信号。 对所测量的磁共振信号进行傅里叶变换，从而获得化学位移图像，并且将测量谱带宽设定为不同于多个化学物质中具有彼此偏离的频率的两个不同化学位移之间的频率差的值 测量频谱带宽由周期性地反转其符号时施加的场梯度的反转周期的倒数确定。 该方法可以独立设置空间分辨率和光谱带宽。

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

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

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。

公开(公告)号：US5382902A

公开(公告)日：1995-01-17

申请号：US985645

申请日：1992-12-07

申请人： Yo Taniguchi ,  Etsuji Yamamoto

发明人： Yo Taniguchi ,  Etsuji Yamamoto

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/563 ,  G01R33/567 ,  G01V3/00

CPC分类号： G01R33/5676

摘要： A magnetic resonance imaging method for obtaining an image of an object laid in a space in which a static magnetic field is applied, so as to substantially eliminate motional artifacts. The method includes sequentially measuring a plurality of magnetic resonance views with a plurality of encodings by repeating a measurement sequence of exciting nuclear spins in said object, applying a phase-encoding field gradient along a first direction with programmed time integral to encode the excited spins, and detecting the encoded spins in the presence of a readout field gradient along a second direction to generate a magnetic resonance view so that measurements of magnetic resonance views with at least low-order encoding are obtained during the repetition of the measurement sequence. Thereafter respective magnetic resonance views are subjected to a first Fourier transformation so as to generate a plurality of projection views with a plurality of encodings forming a data matrix in a hybrid domain, displacements in respective projection views due to motion of the object are corrected using displacement information obtained from projection views with low-order encodings so as to generate a corrected data matrix in the hybrid domain, and the corrected data matrix is subjected to a second Fourier transformation so as to generate the image of the object.

摘要翻译： 一种磁共振成像方法，用于获得放置在施加静磁场的空间中的物体的图像，以便基本上消除运动伪像。 该方法包括通过重复所述物体中激发的核自旋的测量序列来顺序地测量具有多个编码的多个磁共振视图，沿着第一方向施加相位编码场梯度以编程的时间积分来编码激励的自旋， 以及在沿着第二方向存在读出场梯度的情况下检测编码的旋转以产生磁共振视图，使得在重复测量序列期间获得具有至少低阶编码的磁共振视图的测量。 然后对各磁共振视图进行第一傅里叶变换，以便在混合域中产生多个形成数据矩阵的编码的多个投影视图，由于对象的运动而在各个投影视图中的位移使用位移进行校正 从具有低阶编码的投影视图获得的信息，以便在混合域中产生校正数据矩阵，并且对经校正的数据矩阵进行第二傅立叶变换，以便生成对象的图像。

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：US5065097A

公开(公告)日：1991-11-12

申请号：US500901

申请日：1990-03-29

申请人： Tatsuo Nozokido ,  Etsuji Yamamoto ,  Hideki Kohno

发明人： Tatsuo Nozokido ,  Etsuji Yamamoto ,  Hideki Kohno

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/485 ,  G01R33/565

CPC分类号： G01R33/56527 ,  G01R33/485

摘要： A testing method and apparatus by use of nuclear magnetic resonance measure, at timings influenced and not influenced from chemical shift, nuclear magnetic resonance signals taken from a sample to be tested at least one of whose values of permeability and chemical shift is known and a reference sample both of whose values of permeability and chemical shift and their spatial distribution are uniform thereby to acquire four items of image vector information. Further, the testing method and apparatus take phase differences between the items of image vector information to separately extract the phase component influenced by the permeability distribution and the phase component influenced from the chemical shift.

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。

公开(公告)号：US4853636A

公开(公告)日：1989-08-01

申请号：US141788

申请日：1988-01-11

申请人： Etsuji Yamamoto ,  Yukiko Ogura ,  Hideki Kohno

发明人： Etsuji Yamamoto ,  Yukiko Ogura ,  Hideki Kohno

IPC分类号： G01R33/54

CPC分类号： G01R33/4833

摘要： An NMR imaging method for obtaining a tomographic image of an object through two-dimensional Fourier transformation imaging. After a whole image of a predetermined slice is displayed, a given field of view having a given size and located at a given position in the image is designated. On the basis of data derived from this designation, setting values for magnetic field generators and a signal detector are arithmetically determined for limiting the region in which the NMR signal is generated and the region to be imaged, whereby local imaging of the aforementioned field of view is conducted with high resolution. Further, division of an image resulting from the imaging operation is automatically corrected by exchanging positionally the divided image blocks with each other.

摘要翻译： 一种用于通过二维傅里叶变换成像获得物体的断层图像的NMR成像方法。 在显示预定切片的整个图像之后，指定具有给定尺寸并且位于图像中的给定位置的给定视场。 基于从该指定导出的数据，算术地确定用于限制产生NMR信号的区域和要成像的区域的磁场发生器和信号检测器的设定值，由此上述视野的局部成像 以高分辨率进行。 此外，通过将分割的图像块彼此交换而自动地校正由成像操作产生的图像的划分。

公开(公告)号：US4803190A

公开(公告)日：1989-02-07

申请号：US29645

申请日：1987-03-24

申请人： Kohei Sarumaru ,  Etsuji Yamamoto

发明人： Kohei Sarumaru ,  Etsuji Yamamoto

IPC分类号： B01J23/881 ,  B01J23/88 ,  B01J23/883 ,  B01J27/192 ,  B01J37/04 ,  C07B61/00 ,  C07C45/00 ,  C07C45/35 ,  C07C45/37 ,  C07C47/22 ,  C07C51/25 ,  C07C57/05 ,  C07C67/00 ,  C07C253/26 ,  C07C255/08 ,  B01J21/00 ,  B01J23/16 ,  B01J27/18

CPC分类号： B01J23/8876 ,  B01J23/002 ,  B01J27/192 ,  C07C253/26 ,  C07C45/35 ,  C07C45/37 ,  C07C51/252 ,  B01J2523/00 ,  Y02P20/52

摘要： In the production of a Mo-Bi-Na composite oxide catalyst by the process comprising incorporating compounds as respective element sources into a composite and subjecting the composite to heating treatment in an aqueous system, bismuth oxide and/or bismuth subcarbonate are/is used as a Bi source copmpound and at least a part of the heat treatment is conducted at a temperature of 450.degree. to 600.degree. C. The activity of the catalyst is significantly improved by introducing Bi in the form of the specified water insoluble compound into the catalyst.

摘要翻译： 在制备Mo-Bi-Na复合氧化物催化剂的过程中，包括将化合物作为各元素源并入复合材料中，并使复合材料在水性体系中进行加热处理，将氧化铋和/或亚碳酸铋用作 Bi源组成，至少一部分热处理在450〜600℃的温度下进行。通过将特定的水不溶性化合物的Bi引入催化剂，催化剂的活性显着提高。

公开(公告)号：US4558425A

公开(公告)日：1985-12-10

申请号：US413821

申请日：1982-09-01

申请人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hideki Kohno ,  Shinji Yamamoto

发明人： Etsuji Yamamoto ,  Kensuke Sekihara ,  Hideki Kohno ,  Shinji Yamamoto

IPC分类号： A61B10/00 ,  A61B5/055 ,  A61B5/107 ,  G01R33/28 ,  G01R33/38 ,  G01R33/48 ,  G01R33/58 ,  G01N15/00

CPC分类号： G01R33/381 ,  A61B5/1077 ,  G01R33/28 ,  G01R33/58

摘要： In an imaging apparatus using nuclear magnetic resonance which includes apparatus for generating a static magnetic field, a linear gradient magnetic field and a radio frequency magnetic field, respectively, signal detection device for detecting the nuclear magnetic resonant signal from an object to be inspected, a computer for calculating from the detection signal an image and output device for displaying the result of calculation by the computer, the improvement wherein the size of the object to be inspected is detected by use of ultrasonic wave or light beams and a signal indicative of the detected size of the object is applied to the linear gradient magnetic field generation apparatus so as to control the intensity of the linear gradient magnetic field.

摘要翻译： 在使用核磁共振的成像装置中，分别包括用于产生静磁场的装置，线性梯度磁场和射频磁场，用于检测来自被检体的核磁共振信号的信号检测装置， 用于从检测信号计算用于显示计算机的计算结果的图像和输出装置的计算机，其中通过使用超声波或光束来检测要检查的对象的大小，以及指示检测到的信号的信号 物体的大小被施加到线性梯度磁场产生装置，以便控制线性梯度磁场的强度。