公开(公告)号：US06486756B2

公开(公告)日：2002-11-26

申请号：US09816240

申请日：2001-03-26

申请人： Yoshinobu Tarutani ,  Kazuo Saitoh ,  Kazumasa Takagi ,  Yoshihisa Soutome ,  Tokuumi Fukazawa ,  Akira Tsukamoto

发明人： Yoshinobu Tarutani ,  Kazuo Saitoh ,  Kazumasa Takagi ,  Yoshihisa Soutome ,  Tokuumi Fukazawa ,  Akira Tsukamoto

IPC分类号： H03F1700

CPC分类号： H03K19/1952 ,  H01L27/18 ,  H03F19/00

摘要： A superconductor signal amplifier which receives an extremely small high-frequency signal having a frequency of tens of GHz generated in a superconductive circuit, amplifies the voltage of the high-frequency signal without a decrease in frequency, and outputs the thus amplified high-frequency signal from the superconductive circuit. At an output part of a single flux quantum circuit using a flux quantum as a binary information carrier, there are provided a superconductive junction line for flux quantum transmission and a splitter for simultaneously producing two flux quanta from a flux quantum. According to the number of plural series-connected SQUIDs, a plurality of flux quantum signals are generated and input to the plural series-connected SQUIDs so that the SQUIDs are simultaneously switched to a voltage state. In each SQUID pair comprising two SQUIDs, a part of an inductor is shared by the two SQUIDs for reduction in inductance, thereby increasing an output voltage of the series-connected SQUIDs. Furthermore, a magnetic shielding film formed under each SQUID is electrically isolated from ground to prevent a signal delay due to a parasitic capacitance.

摘要翻译： 接收在超导电路中产生的具有数十GHz频率的极小的高频信号的超导体信号放大器放大高频信号的电压而不降低频率，并输出这样放大的高频信号 从超导电路。 在使用磁通量子作为二进制信息载体的单个量子电路的输出部分，提供了用于磁通量子传输的超导结线和用于从磁通量子同时产生两个通量量子的分离器。 根据多个串联SQUID的数量，产生多个通量量子信号并将其输入到多个串联连接的SQUID，使得SQUID同时切换到电压状态。 在包含两个SQUID的每个SQUID对中，电感器的一部分由两个SQUID共享以减小电感，从而增加串联连接的SQUID的输出电压。 此外，形成在每个SQUID下方的磁屏蔽膜与地电隔离以防止由寄生电容引起的信号延迟。

公开(公告)号：US09678187B2

公开(公告)日：2017-06-13

申请号：US14240171

申请日：2012-07-27

申请人： Toru Shirai ,  Yoshitaka Bito ,  Satoshi Hirata ,  Yoshihisa Soutome

发明人： Toru Shirai ,  Yoshitaka Bito ,  Satoshi Hirata ,  Yoshihisa Soutome

IPC分类号： G01R33/46 ,  G01R33/485 ,  G01R33/565 ,  A61B5/055

CPC分类号： G01R33/4625 ,  A61B5/055 ,  G01R33/485 ,  G01R33/56518

摘要： An object of the present invention is to suppress artifacts generated by correction of spectral distortion induced by eddy currents in MRI devices with a simple method, and thereby improve accuracy of the correction.

公开(公告)号：US09599685B2

公开(公告)日：2017-03-21

申请号：US13877702

申请日：2011-10-06

申请人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

IPC分类号： G01R33/34 ,  G01R33/345 ,  H01Q9/06 ,  H01Q21/20 ,  G01R33/28 ,  G01R33/36 ,  G01R33/422

CPC分类号： G01R33/34092 ,  G01R33/288 ,  G01R33/34046 ,  G01R33/3456 ,  G01R33/3657 ,  G01R33/422 ,  H01Q9/065 ,  H01Q21/20

摘要： There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller.

公开(公告)号：US09459331B2

公开(公告)日：2016-10-04

申请号：US13984855

申请日：2012-02-01

申请人： Yosuke Otake ,  Yoshihisa Soutome ,  Ryota Sato ,  Yoshitaka Bito ,  Koji Hirata

发明人： Yosuke Otake ,  Yoshihisa Soutome ,  Ryota Sato ,  Yoshitaka Bito ,  Koji Hirata

IPC分类号： G01R33/3415 ,  G01R33/36 ,  G01R33/422 ,  G01R33/34

CPC分类号： G01R33/365 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3635 ,  G01R33/3657 ,  G01R33/3678 ,  G01R33/422

摘要： To provide a technique for sufficiently eliminating magnetic coupling between RF coils and improving image quality when a multi-element multi-tuned RF coil is used as a receive RF coil for an MRI device. In the invention, each of RF coils which constitute a multi-element multi-tuned RF coil which is used as a receive RF coil for an MRI device is provided with an inter-coil magnetic coupling prevention circuit which resonates at each frequency to which each RF coil is tuned and provides a high impedance. The inter-coil magnetic coupling prevention circuit adjusts an inductor and a capacitor so that both of a circuit on the side of a pre-amplifier viewed from both ends of a signal reception circuit and a circuit on the side of the signal reception circuit viewed from both ends of a serial resonance circuit connected to the pre-amplifier resonate at a plurality of frequencies to which the respective RF coils are tuned.

摘要翻译： 提供一种用于充分消除RF线圈之间的磁耦合并且当多元素多调谐RF线圈用作MRI装置的接收RF线圈时提高图像质量的技术。 在本发明中，构成用作MRI装置的接收RF线圈的多元素多调谐RF线圈的每个RF线圈都设置有线圈间磁耦合防止电路，该电路在每个频率下共振， RF线圈被调谐并提供高阻抗。 线圈间磁耦合防止电路调整电感器和电容器，使得从信号接收电路的两端观看的前置放大器侧的电路和从信号接收电路侧观察的电路 连接到前置放大器的串联谐振电路的两端以相应的RF线圈调谐到的多个频率谐振。

公开(公告)号：US09182468B2

公开(公告)日：2015-11-10

申请号：US13577241

申请日：2011-01-26

申请人： Yukio Kaneko ,  Hideta Habara ,  Yoshihisa Soutome ,  Yosuke Otake ,  Hisaaki Ochi ,  Yoshitaka Bito

发明人： Yukio Kaneko ,  Hideta Habara ,  Yoshihisa Soutome ,  Yosuke Otake ,  Hisaaki Ochi ,  Yoshitaka Bito

IPC分类号： G01R33/565 ,  G01R33/34 ,  G01R33/3415 ,  G01R33/36

CPC分类号： G01R33/5659 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3657 ,  G01R33/3664 ,  G01R33/3678

摘要： There is provided a technique for improving quality of images obtained with an MRI apparatus by using the geometric structures of the conventional RF transmission coil and RF reception coil and without increasing burden on patients or MRI technicians. A conductor loop of an RF reception coil disposed between a subject and an RF transmission coil is used also as a loop for magnetic field adjustment in order to shield or enhance a rotating magnetic field B1 generated by the RF transmission coil. Further, the conductor loop operated as a conductor loop for magnetic field adjustment among the conductor loops constituting the RF reception coil is driven so that inhomogeneity of the rotating magnetic field B1 is reduced.

摘要翻译： 提供了一种通过使用常规RF传输线圈和RF接收线圈的几何结构来提高使用MRI装置获得的图像质量并且不增加患者或MRI技术人员负担的技术。 设置在被检体和RF传输线圈之间的RF接收线圈的导体环也用作用于磁场调整的环路，以便屏蔽或增强由RF传输线圈产生的旋转磁场B1。 此外，作为构成RF接收线圈的导体环路之间用于磁场调整的导体回路的导体回路被驱动，使得旋转磁场B1的不均匀性降低。

公开(公告)号：US20140253126A1

公开(公告)日：2014-09-11

申请号：US14349424

申请日：2012-10-17

申请人： Hideta Habara ,  Yoshihisa Soutome ,  Hiroyuki Takeuchi ,  Hisaaki Ochi

发明人： Hideta Habara ,  Yoshihisa Soutome ,  Hiroyuki Takeuchi ,  Hisaaki Ochi

IPC分类号： G01R33/34

CPC分类号： G01R33/34092 ,  G01R33/3415 ,  G01R33/3453 ,  G01R33/36 ,  G01R33/365

摘要： In order to provide a technique which can suppress coupling to homogenize the spatial distribution of an RF magnetic field and can improve penetration of the RF magnetic field into the subject, pad-like electric field conductors having a predetermined area are provided outside both ends of a rung conductor as a part of a configuration which forms a loop-like circuit and is driven as an antenna. An antenna device includes a sheet-like conductor, a rung conductor which is arranged at a predetermined distance from the sheet-like conductor, two electric field conductors which are arranged in both end portions of the rung conductor at a predetermined distance from the sheet-like conductor, and connection terminals which are transmission and reception terminals provided in the rung conductor and the sheet-like conductor. The rung conductor and the sheet-like conductor configure a loop circuit which resonates at a preset frequency.

摘要翻译： 为了提供可以抑制耦合以均匀化RF磁场的空间分布并且可以改善RF磁场对被摄体的穿透的技术，具有预定面积的垫状电场导体设置在 梯形导体作为形成环状电路并被驱动为天线的配置的一部分。 天线装置包括片状导体，布置在与片状导体预定距离的梯形导体，两个电场导体，布置在与片状导体预定距离的梯形导体的两个端部中， 以及设置在梯形导体和片状导体中的发送和接收端子的连接端子。 梯形导体和片状导体构成以预设频率谐振的环路电路。

公开(公告)号：US20130221968A1

公开(公告)日：2013-08-29

申请号：US13877702

申请日：2011-10-06

申请人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

IPC分类号： G01R33/34

CPC分类号： G01R33/34092 ,  G01R33/288 ,  G01R33/34046 ,  G01R33/3456 ,  G01R33/3657 ,  G01R33/422 ,  H01Q9/065 ,  H01Q21/20

摘要： There is provided a technique for suppressing increase of SAR without sacrificing sensitivity in RF coils used in MRI apparatuses. The present invention provides an antenna device comprising a sheet-shaped conductor and a ribbon-shaped conductor disposed on the subject side with respect to the sheet-shaped conductor with a predetermined distance from the sheet-shaped conductor. The ribbon-shaped conductor has a meandering shape, and is adjusted so as to resonate at transmission and reception frequencies, and it is constituted so that distance to the sheet-shaped conductor becomes smaller at both end part thereof along the static magnetic field direction compared with the distance to the sheet-shaped conductor at the center thereof. Moreover, the ribbon-shaped conductor is constituted so as to have a smaller width, as the distance to the sheet-shaped conductor becomes smaller.

摘要翻译： 提供了抑制SAR增加的技术，而不牺牲MRI装置中使用的RF线圈的灵敏度。 本发明提供了一种天线装置，其包括片状导体和布置在与片状导体相距预定距离的片状导体的被检体侧的带状导体。 带状导体具有曲折形状，并且被调整为在发送和接收频率下谐振，并且其构造成使得沿着静磁场方向在其两端部处的与片状导体的距离变小 与其中心的片状导体的距离。 此外，随着与片状导体的距离变小，带状导体构成为具有较小的宽度。

公开(公告)号：US08193810B2

公开(公告)日：2012-06-05

申请号：US12292449

申请日：2008-11-19

申请人： Yosuke Otake ,  Yoshihisa Soutome ,  Koji Hirata ,  Yoshitaka Bito

发明人： Yosuke Otake ,  Yoshihisa Soutome ,  Koji Hirata ,  Yoshitaka Bito

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/3635

摘要： An RF coil having at least three different resonance frequencies, wherein one of the resonance frequencies is adjusted to be a frequency fA of a magnetic resonance signal generated by a test subject, and the coil is adjusted so that ratio of difference between the frequency fA and a first frequency fB lower than fA and nearest to fA among the resonance frequencies (fA−fB), and difference between the frequency fA and a second resonance frequency fC higher than fA and nearest to the frequency fA among the resonance frequencies (fC−fA), should be from 0.5 to 2.0. There is provided a technique for receiving magnetic resonance signals always with high detection efficiency by an RF coil of an MRI apparatus even if significant loss is caused in the RF coil, or test subject is changed.

摘要翻译： 具有至少三个不同谐振频率的RF线圈，其中谐振频率之一被调整为由测试对象产生的磁共振信号的频率fA，并且调节线圈，使得频率fA与 在谐振频率（fA-fB）中比fA低且最接近fA的第一频率fB，以及频率fA与谐振频率（fC-fA）之间的最接近频率fA的fA的第二谐振频率fC之间的差 ），应为0.5〜2.0。 提供了一种用于通过MRI装置的RF线圈始终具有高检测效率的磁共振信号的技术，即使在RF线圈中引起显着的损失，或者测试对象发生变化。

公开(公告)号：US20110121834A1

公开(公告)日：2011-05-26

申请号：US13054474

申请日：2009-07-22

申请人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito

发明人： Yoshihisa Soutome ,  Hideta Habara ,  Yoshitaka Bito

IPC分类号： G01R33/44

CPC分类号： G01R33/365 ,  G01R33/3415 ,  G01R33/3657

摘要： There is provided a high-frequency coil of an MRI device, which can easily and highly reproducibly reduce electromagnetic coupling between adjacent surface coils among a plurality of surface coils disposed with intervals. An electromagnetic decoupling coil that can generate a magnetic flux for canceling a magnetic flux generated by one of the adjacent surface coils and interlinking with the other surface coil is disposed between the adjacent surface coils. The electromagnetic decoupling coil is provided with a capacitor, and is tuned by means of the capacitor so that the electromagnetic coupling should be minimized in such a range that the resonance frequency thereof should be lower than the resonance frequency of the surface coils.

摘要翻译： 提供了一种MRI装置的高频线圈，其可以容易且高度可重复地减少间隔设置的多个表面线圈中的相邻表面线圈之间的电磁耦合。 可以在相邻的表面线圈之间设置电磁去耦线圈，该电磁去耦线圈可以产生用于消除由相邻的表面线圈之一产生的磁通并与另一个表面线圈相互连接的磁通量。 电磁去耦线圈设置有电容器，并通过电容器进行调谐，使得电磁耦合应在其共振频率应低于表面线圈的谐振频率的范围内最小化。

公开(公告)号：US20080061785A1

公开(公告)日：2008-03-13

申请号：US11782679

申请日：2007-07-25

申请人： Yoshihisa Soutome ,  Hideta Habara ,  Hisaaki Ochi

发明人： Yoshihisa Soutome ,  Hideta Habara ,  Hisaaki Ochi

IPC分类号： G01R33/34

CPC分类号： G01R33/3453 ,  G01R33/34076 ,  G01R33/3628 ,  G01R33/3635 ,  G01R33/3678

摘要： In an MRI apparatus, an RF coil is provided which can generate or detect a circularly-polarized magnetic field with one feeding port, and which can radiate highly efficient, highly homogeneous electromagnetic waves and detect a highly sensitive, highly homogeneous magnetic resonance signal. For this purpose, the coil has a cylindrical shape, one feeding port which exchanges signals, plural first capacitors disposed at circumferential positions in at least one cross-section effectively orthogonal to the direction of the static magnetic field, and at least one second capacitor. In this RF coil, in which a static magnetic field is applied in essentially an identical direction to the direction of the central axis of the cylindrical shape, a second capacitor having a smaller capacity than the capacity of the first capacitor, is disposed at a position from 22.5° to 67.5° or 202.5° to 247.5° in a clockwise direction with respect to the center of the cylindrical shape from the feeding port in a cross-section viewed from a direction passing through the static magnetic field.

摘要翻译： 在MRI装置中，提供能够利用一个馈送端口产生或检测圆偏振磁场的RF线圈，并且可以辐射高效，高度均匀的电磁波并检测高灵敏度，高度均匀的磁共振信号。 为此，线圈具有圆筒形状，一个馈送端口交换信号，多个第一电容器设置在与静态磁场方向有效正交的至少一个截面的圆周位置处，以及至少一个第二电容器。 在该RF线圈中，以与圆筒形状的中心轴方向基本相同的方向施加静磁场，将具有比第一电容器容量小的容量的第二电容器设置在位置 在从穿过静磁场的方向观察的横截面中，相对于圆柱形的中心从顺时针方向从22.5°至67.5°或202.5°至247.5°。