公开(公告)号：US20120262173A1

公开(公告)日：2012-10-18

申请号：US13512090

申请日：2010-11-29

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

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

IPC分类号： G01R33/34 ,  G01R33/48

CPC分类号： G01R33/34046 ,  G01R33/34053 ,  G01R33/34076 ,  G01R33/3453 ,  G01R33/3657 ,  G01R33/3678

摘要： There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.

摘要翻译： 提供了一种用于在隧道式MRI装置中确保大的检查空间的技术，而不会增加制造成本，并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。 在部分圆柱形RF线圈的两个梯级之间，该线圈对应于部分被去除的圆柱形RF线圈，设置有产生磁场的半环，该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。 此外，具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。

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：US08947084B2

公开(公告)日：2015-02-03

申请号：US13125829

申请日：2009-07-22

申请人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Masayoshi Dohata

发明人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Masayoshi Dohata

IPC分类号： G01R33/44 ,  H01Q9/04 ,  G01R33/34 ,  G01R33/341 ,  A61B5/055

CPC分类号： G01R33/34046 ,  A61B5/055 ,  G01R33/34007 ,  G01R33/34053 ,  G01R33/34061 ,  G01R33/341

摘要： Manufacture cost and maintenance cost of RF coils of MRI devices are reduced without any limitation concerning size of the coils. By constituting an antenna device for magnetic resonance imaging devices with a cylindrical outer conductor, a looped ribbon-shaped conductor disposed inside the cylindrical outer conductor along the cylindrical surface, and a feed point for transmission and/or reception between the cylindrical conductor and the ribbon-shaped conductor, and disposing the ribbon-shaped conductor so that length thereof can be readily adjusted, there is provided an antenna device for magnetic resonance imaging devices that generates a magnetic field component perpendicular to the central axis of the cylinder at a desired resonance frequency and shows sensitivity without using capacitors and without being imposed any limitation concerning size in the diametral direction of the cylinder.

摘要翻译： 降低了MRI装置的RF线圈的制造成本和维护成本，而对于线圈的尺寸没有任何限制。 通过构成用于具有圆柱形外部导体的磁共振成像装置的天线装置，沿着圆柱形表面设置在圆柱形外部导体内的环状带状导体，以及用于在圆柱形导体和带状物之间传输和/或接收的馈电点 并且设置带状导体以使得其长度可以容易地调整，提供了一种用于磁共振成像装置的天线装置，其以期望的共振频率产生垂直于圆柱体的中心轴线的磁场分量 并且在不使用电容器的情况下显示灵敏度，并且不对气缸的直径方向上的尺寸施加任何限制。

公开(公告)号：US08803526B2

公开(公告)日：2014-08-12

申请号：US13142439

申请日：2010-01-28

申请人： Yosuke Otake ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Koji Hirata

发明人： Yosuke Otake ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Koji Hirata

IPC分类号： G01V3/00

CPC分类号： G01R33/3685

摘要： The present invention provides a technique for maintaining a function for effectively blocking common mode noise with a simple configuration, even in the case where unbalance occurs in characteristic impedance of a coaxial cable in an MRI apparatus, and improving the performance of an RF coil. In a circuit where a balun is established by parallel connection with the coaxial cable, multiple serial resonance circuits having different resonance frequencies are connected in parallel. A value of each constitutional element of each of the serial resonance circuits is adjusted in such a manner that the frequency for blocking the common mode noise of the entire balun falls into a range between the resonance frequencies of these serial resonance circuits.

摘要翻译： 本发明提供一种技术，即使在MRI装置中的同轴电缆的特性阻抗发生不平衡的情况下，也能够提高RF线圈的性能的情况下，以简单的结构保持用于有效阻断共模噪声的功能。 在通过与同轴电缆并联建立平衡 - 不平衡转换器的电路中，并联连接具有不同谐振频率的多个串联谐振电路。 每个串联谐振电路的每个结构元件的值被调整为使得阻挡整个平衡 - 不平衡转换器的共模噪声的频率落入这些串联谐振电路的谐振频率之间的范围内。

公开(公告)号：US20120306497A1

公开(公告)日：2012-12-06

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： G01R33/34

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：US20110204890A1

公开(公告)日：2011-08-25

申请号：US13125829

申请日：2009-07-22

申请人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Masayoshi Dohata

发明人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Masayoshi Dohata

IPC分类号： G01R33/44 ,  H01Q9/04

CPC分类号： G01R33/34046 ,  A61B5/055 ,  G01R33/34007 ,  G01R33/34053 ,  G01R33/34061 ,  G01R33/341

摘要： Manufacture cost and maintenance cost of RF coils of MRI devices are reduced without any limitation concerning size of the coils. By constituting an antenna device for magnetic resonance imaging devices with a cylindrical outer conductor, a looped ribbon-shaped conductor disposed inside the cylindrical outer conductor along the cylindrical surface, and a feed point for transmission and/or reception between the cylindrical conductor and the ribbon-shaped conductor, and disposing the ribbon-shaped conductor so that length thereof can be readily adjusted, there is provided an antenna device for magnetic resonance imaging devices that generates a magnetic field component perpendicular to the central axis of the cylinder at a desired resonance frequency and shows sensitivity without using capacitors and without being imposed any limitation concerning size in the diametral direction of the cylinder.

摘要翻译： 降低了MRI装置的RF线圈的制造成本和维护成本，而对于线圈的尺寸没有任何限制。 通过构成用于具有圆柱形外部导体的磁共振成像装置的天线装置，沿着圆柱形表面设置在圆柱形外部导体内的环状带状导体，以及用于在圆柱形导体和带状物之间传输和/或接收的馈电点 并且设置带状导体以使得其长度可以容易地调整，提供了一种用于磁共振成像装置的天线装置，其以期望的共振频率产生垂直于圆柱体的中心轴线的磁场分量 并且在不使用电容器的情况下显示灵敏度，并且不对气缸的直径方向上的尺寸施加任何限制。

公开(公告)号：US20080315880A1

公开(公告)日：2008-12-25

申请号：US12071795

申请日：2008-02-26

申请人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

IPC分类号： G01R33/341

CPC分类号： G01R33/34076 ,  G01R33/34007 ,  G01R33/3635

摘要： There is provided an RF coil capable of resonating or tuning two frequencies, having uniform spatial sensitivity and having a small spatially occupied volume, especially an RF coil suitable for a high magnetic field MRI apparatus. A coil apparatus is made up of a plurality of linear conductors 200, 201 arranged around a central axis and two ring conductors 202, 203 connected to the respective ends of the plurality of linear conductors 200, 201 and capacitors are inserted in the linear conductors 200, 201 and ring conductors 202, 203. The plurality of linear conductors are made up of conductors 200 located near the central axis and conductors 201 located far from the central axis and the ring conductors 202, 203 have star-like polygonal shape so that the linear conductors are arranged alternately. This structure can realize two tuning modes; a resonance mode similar to a birdcage type resonance mode and a resonance mode which becomes zero (node) in the vicinity of the linear conductor group 200 located near the central axis.

摘要翻译： 提供了能够谐振或调谐两个频率的RF线圈，其具有均匀的空间灵敏度并且具有小的空间占用体积，特别是适用于高磁场MRI装置的RF线圈。 线圈装置由围绕中心轴线布置的多个线性导体200,201和连接到多个线性导体200,201的各个端部的两个环形导体202,203组成，并且电容器插入线性导体200 ，201和环形导体202,203。多个线性导体由位于中心轴附近的导体200和位于远离中心轴线的导体201组成，并且环形导体202,203具有星形多边形形状，使得 线性导体交替排列。 该结构可实现两种调谐方式; 类似于鸟笼型共振模式的谐振模式和在位于中心轴附近的线性导体组200附近变为零（节点）的谐振模式。

公开(公告)号：US20130069652A1

公开(公告)日：2013-03-21

申请号：US13522928

申请日：2011-01-25

申请人： Yosuke Otake ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Koji Hirata

发明人： Yosuke Otake ,  Yoshihisa Soutome ,  Yukio Kaneko ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Koji Hirata

IPC分类号： G01R33/34

CPC分类号： G01R33/3664 ,  G01R33/34053 ,  G01R33/34076 ,  G01R33/3415

摘要： There is a provided a technology of receiving a magnetic resonance signal highly sensitively and with a uniform sensitivity distribution in an RF coil of an MRI device which is an RF coil including a switch circuit of switching a circuit configuration. The RF coil of the MRI device of the present invention includes a switch circuit of switching a circuit configuration. Also, the switch circuit switches the circuit configuration by being driven by a control signal received by wireless. For that purpose, the switch circuit includes an antenna of receiving the control signal and a conversion circuit of converting an alternating current voltage received into a direct current voltage.

摘要翻译： 提供了一种技术，其高灵敏度地接收磁共振信号，并且在作为包括切换电路配置的开关电路的RF线圈的MRI装置的RF线圈中具有均匀的灵敏度分布。 本发明的MRI装置的RF线圈包括切换电路结构的开关电路。 此外，开关电路通过由无线接收的控制信号驱动来切换电路配置。 为此，开关电路包括接收控制信号的天线和将所接收的交流电压转换成直流电压的转换电路。

公开(公告)号：US07639012B2

公开(公告)日：2009-12-29

申请号：US12071795

申请日：2008-02-26

申请人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

IPC分类号： G01V3/00

CPC分类号： G01R33/34076 ,  G01R33/34007 ,  G01R33/3635

摘要： There is provided an RF coil capable of resonating or tuning two frequencies, having uniform spatial sensitivity and having a small spatially occupied volume, especially an RF coil suitable for a high magnetic field MRI apparatus. A coil apparatus is made up of a plurality of linear conductors 200, 201 arranged around a central axis and two ring conductors 202, 203 connected to the respective ends of the plurality of linear conductors 200, 201 and capacitors are inserted in the linear conductors 200, 201 and ring conductors 202, 203. The plurality of linear conductors are made up of conductors 200 located near the central axis and conductors 201 located far from the central axis and the ring conductors 202, 203 have star-like polygonal shape so that the linear conductors are arranged alternately. This structure can realize two tuning modes; a resonance mode similar to a birdcage type resonance mode and a resonance mode which becomes zero (node) in the vicinity of the linear conductor group 200 located near the central axis.

摘要翻译： 提供了能够谐振或调谐两个频率的RF线圈，其具有均匀的空间灵敏度并且具有小的空间占用体积，特别是适用于高磁场MRI装置的RF线圈。 线圈装置由围绕中心轴线布置的多个线性导体200,201和连接到多个线性导体200,201的各个端部的两个环形导体202,203组成，并且电容器插入线性导体200 ，201和环形导体202,203。多个线性导体由位于中心轴附近的导体200和位于远离中心轴线的导体201组成，并且环形导体202,203具有星形多边形形状，使得 线性导体交替排列。 该结构可实现两种调谐方式; 类似于鸟笼型共振模式的谐振模式和在位于中心轴附近的线性导体组200附近变为零（节点）的谐振模式。

公开(公告)号：US07589530B2

公开(公告)日：2009-09-15

申请号：US11936885

申请日：2007-11-08

申请人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Yoshihisa Soutome ,  Hisaaki Ochi

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/3635

摘要： An RF coil which is resonant and tuned with two different frequencies, has uniform space sensitivity and occupies less space is provided. The coil is, particularly suited to the high magnetic field MRI apparatus. The coil device is equipped with the multiple number of first coils 200 having the first conducting sections 201 and 202 and the second conducting sections 203 and 204, and the second coils 205 and 206 electrically connected with the end of the multiple number of first coils. In the first conducting sections, two conducting parts 201 and 202 are electrically connected via the first condenser 207, while in the second conducting sections, two conducting parts 203 and 204 are electrically connected via the second condenser 208. And the feeding circuit and/or receiving circuit are connected in parallel with the first condenser at one or two positions. By adjusting the capacity of the first and the second condenser, the RF coil having a uniform sensitivity range at two different frequencies can be configured.

摘要翻译： 谐振和调谐两种不同频率的RF线圈具有均匀的空间灵敏度，占用较少的空间。 该线圈特别适用于高磁场MRI装置。 线圈装置配备有多个具有第一导电部分201和202以及第二导电部分203和204的第一线圈200，并且第二线圈205和206与多个第一线圈的端部电连接。 在第一导电部分中，两个导电部分201和202经由第一电容器207电连接，而在第二导电部分中，两个导电部分203和204经由第二电容器208电连接。并且馈电电路和/或 接收电路在一个或两个位置与第一电容器并联连接。 通过调整第一和第二电容器的容量，可以配置具有两个不同频率的均匀灵敏度范围的RF线圈。