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：US20110267062A1

公开(公告)日：2011-11-03

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： G01R33/32 ,  H03H7/42

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：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：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：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：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：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：US20140292334A1

公开(公告)日：2014-10-02

申请号：US14241515

申请日：2012-07-27

申请人： Yukio Kaneko ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hideta Habara ,  Yosuke Otake

发明人： Yukio Kaneko ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hideta Habara ,  Yosuke Otake

IPC分类号： G01R33/565

CPC分类号： G01R33/5659 ,  A61B5/055 ,  G01R33/246 ,  G01R33/4835 ,  G01R33/5612

摘要： With minimizing extension of imaging time, the B1 non-uniformity reducing effect of RF shimming is maximized for an imaging section of an arbitrary axis direction and an arbitrary position. B1 distributions are measured for only several sections of one predetermined direction, and a radio frequency magnetic field condition that maximizes the B1 non-uniformity reducing effect for an imaging section of an arbitrary direction and an arbitrary position is calculated from the B1 distribution data. For example, after B1 distributions of only several sections of the AX direction are measured, the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the AX direction is obtained by interpolation with optimal radio frequency magnetic field conditions calculated from B1 distributions of two sections near the imaging section, and the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the SAG or COR direction is obtained by using only B1 values of a crossing region with the imaging section extracted from the B1 distributions.

摘要翻译： 随着成像时间的延长最小化，对于任意轴方向和任意位置的成像部分，RF匀场的B1均匀性减小效果最大化。 B1分布仅测量一个预定方向的几个部分，并且从B1分布数据计算使任意方向和任意位置的成像部分的B1不均匀性减小效果最大化的射频磁场条件。 例如，在AX方向的仅仅几个部分的B1分布被测量之后，通过利用从B1计算出的最佳射频磁场条件进行插值来获得用于AX方向的任意位置的成像部分的最佳射频磁场条件 通过仅使用从B1提取的成像部分的交叉区域的B1值获得用于SAG或COR方向的任意位置的成像部分的最佳射频磁场条件， 分布。

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：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。