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：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：US08742759B2

公开(公告)日：2014-06-03

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： G01V3/00

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：US20120299594A1

公开(公告)日：2012-11-29

申请号：US13577885

申请日：2011-01-21

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： G01R33/28

CPC分类号： G01R33/34046

摘要： There is provided a technique for securing a comfortable examination space in a tunnel type MRI apparatus without increasing the manufacturing cost of the MRI apparatus and sacrificing performance thereof. In an RF coil provided with a hollow-shaped outer conductive element and a strip-shaped conductive element disposed along the outer conductive element in the axial direction, meander lines constituting the strip-shaped conductive element are disposed at uneven distances from the outer conductive element to secure an internal space. In order to obtain uniform sensitivity at the center of the RF coil, the strip-shaped conductive element is constituted with N of connected meander lines, and length of the strip-shaped conductive element is adjusted so that, in the strip-shaped conductive element resonating at resonance frequency of the antenna, nodes are formed in a number of (M+1)×N−1, wherein M is 0 or a natural number of 1 or larger.

摘要翻译： 提供了一种用于在隧道式MRI装置中确保舒适检查空间而不增加MRI装置的制造成本并牺牲其性能的技术。 在具有中空状的外部导电元件的RF线圈和沿着外部导电元件沿轴向设置的条状导电元件，构成条形导电元件的曲折线设置在与外部导电元件不均匀的距离处 以确保内部空间。 为了在RF线圈的中心获得均匀的灵敏度，带状导电元件由N个连接的曲折线构成，并且条形导电元件的长度被调节，使得在带状导电元件 在天线的谐振频率下共振，以（M + 1）×N-1的数量形成节点，其中M为0或自然数为1或更大。

公开(公告)号：US08115486B2

公开(公告)日：2012-02-14

申请号：US12260612

申请日：2008-10-29

申请人： Hideta Habara ,  Yoshitaka Bito

发明人： Hideta Habara ,  Yoshitaka Bito

IPC分类号： G01V3/00 ,  A61B5/055 ,  G06K9/00

CPC分类号： G01R33/3607 ,  G01R33/288 ,  G01R33/4833 ,  G01R33/4836

摘要： An MRI apparatus comprises a waveform controlling means for calculating a radio frequency pulse and applying the pulse to an irradiating means, and the waveform controlling means reads out a radio frequency pulse waveform vector from a first memory means which memorizes multiple radio frequency pulse waveform vectors, calculates a simulated irradiation pattern, and calculates a radio frequency pulse waveform which gives the minimum value of weighted sum of squares of differences of absolute values and squares of differences of phases for an ideal irradiation pattern and the simulated irradiation pattern. An RF pulse waveform showing superior ideal irradiation pattern reproducibility and providing reduced power of the RF waveform is formed, and safety of MRI subject is improved by performing imaging using such an RF pulse.

摘要翻译： MRI装置包括波形控制装置，用于计算射频脉冲并将脉冲施加到照射装置，波形控制装置从存储多个射频脉冲波形向量的第一存储装置读出射频脉冲波形向量， 计算模拟照射图案，并计算给出理想照射图案和模拟照射图案的相位差绝对值和平方差的加权平方和的最小值的射频脉搏波形。 形成显示优异的理想照射图案再现性并且提供RF波形的功率降低的RF脉冲波形，并且通过使用这样的RF脉冲进行成像来提高MRI对象的安全性。

公开(公告)号：US07733092B2

公开(公告)日：2010-06-08

申请号：US12018287

申请日：2008-01-23

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： G01R33/341 ,  G01R33/34046 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/34076 ,  G01R33/3635

摘要： Provided is an RF coil which can highly efficiently and uniformly irradiate a RF magnetic field having two or more magnetic resonance frequencies close to each other, and receive magnetic resonance signals of two or more magnetic resonance frequencies close to each other with high sensitivity and uniform sensitivity profile in an MRI apparatus. Two or more frequencies to which the coil is tuned are adjusted so as to be between resonance frequencies of series resonant circuits constituting the RF coil.

摘要翻译： 提供一种可以高效地均匀地照射具有两个或更多个磁共振频率彼此接近的RF磁场的RF线圈，并以高灵敏度和均匀的灵敏度接收彼此接近的两个或更多个磁共振频率的磁共振信号 在MRI设备中。 线圈调谐到的两个或更多个频率被调整为在构成RF线圈的串联谐振电路的谐振频率之间。