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：US09726744B2

公开(公告)日：2017-08-08

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 ,  G01R33/24 ,  A61B5/055 ,  G01R33/483 ,  G01R33/561

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

摘要： Systems and methods for magnetic resonance imaging, including adjusting spatial distribution of a rotating magnetic field. By minimizing imaging time, the B1 nonuniformity 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.

公开(公告)号：US08198894B2

公开(公告)日：2012-06-12

申请号：US12417852

申请日：2009-04-03

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

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

IPC分类号： G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/34053 ,  G01R33/34076 ,  G01R33/341 ,  G01R33/3635

摘要： An RF coil for MR Imaging that can change a resonance frequency easily and instantaneously in response to a nuclide to be imaged without exchange and adjustment and that also causes only small lowering of sensitivity. The RF coil has a sub coil for changing a resonance frequency of the transmitting/receiving RF coil for transmitting and receiving an MR signal between itself and a nuclide that is an object to be imaged. The sub coil is equipped with a switch, and at the time of switching-on, shifts the resonance frequency of the RF coil by changing an inductance value of the RF coil in a noncontact manner using inductance coupling.

摘要翻译： 用于MR成像的RF线圈，其能够响应于待成像的核素而容易且瞬时地改变谐振频率而不进行交换和调整，并且也仅导致灵敏度的小的降低。 RF线圈具有用于改变发射/接收RF线圈的谐振频率的子线圈，用于在其与作为要成像的对象的核素之间发送和接收MR信号。 子线圈配备有开关，并且在接通时通过使用电感耦合以非接触方式改变RF线圈的电感值来移动RF线圈的谐振频率。

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：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：US09541614B2

公开(公告)日：2017-01-10

申请号：US14001221

申请日：2012-04-06

申请人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hideta Habara

发明人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hideta Habara

IPC分类号： G01R33/34 ,  A61B5/055

CPC分类号： G01R33/34 ,  A61B5/055 ,  G01R33/34076

摘要： The present invention is directed to an elliptical birdcage coil which reduces time and effort upon manufacturing and production cost, with less variations in performance. There is provided a high frequency coil unit made up of the elliptical birdcage coil having plural capacitors arranged at least on either of the ring conductors and the rung conductors, the capacitance of the plural capacitors being uniform with respect to each conductor type on which the capacitors are placed. In this elliptical birdcage coil, a value of inductance and arrangement of the ring conductors and the rung conductors are determined in such a manner that the capacitance of the capacitors becomes identical with respect to each conductor type on which the capacitors are arranged.

摘要翻译： 本发明涉及椭圆形鸟笼线圈，其减少制造时的时间和精力以及生产成本，性能变化较小。 提供了一种高频线圈单元，其由椭圆形的鸟笼线圈构成，具有至少布置在任一个环形导体和梯形导体上的多个电容器，多个电容器的电容相对于其上的电容器 摆放在。 在该椭圆形的鸟笼线圈中，以这样一种方式确定环形导体和梯形导体的电感和布置值，使得电容器的电容相对于其上布置有电容器的每种导体类型相同。

公开(公告)号：US20140103931A1

公开(公告)日：2014-04-17

申请号：US14001221

申请日：2012-04-06

申请人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hideta Habara

发明人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hideta Habara

IPC分类号： G01R33/34

CPC分类号： G01R33/34 ,  A61B5/055 ,  G01R33/34076

摘要： The present invention is directed to an elliptical birdcage coil which reduces time and effort upon manufacturing and production cost, with less variations in performance. There is provided a high frequency coil unit made up of the elliptical birdcage coil having plural capacitors arranged at least on either of the ring conductors and the rung conductors, the capacitance of the plural capacitors being uniform with respect to each conductor type on which the capacitors are placed. In this elliptical birdcage coil, a value of inductance and arrangement of the ring conductors and the rung conductors are determined in such a manner that the capacitance of the capacitors becomes identical with respect to each conductor type on which the capacitors are arranged.

摘要翻译： 本发明涉及椭圆形鸟笼线圈，其减少制造时的时间和精力以及生产成本，性能变化较小。 提供了一种高频线圈单元，其由椭圆形的鸟笼线圈构成，具有至少布置在任一个环形导体和梯形导体上的多个电容器，多个电容器的电容相对于其上的电容器 摆放在。 在该椭圆形的鸟笼线圈中，以这样一种方式确定环形导体和梯形导体的电感和布置值，使得电容器的电容相对于其上布置有电容器的每种导体类型相同。

公开(公告)号：US07884609B2

公开(公告)日：2011-02-08

申请号：US12071899

申请日：2008-02-27

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： G01R33/34046 ,  G01R33/34007 ,  G01R33/34076 ,  G01R33/3415 ,  G01R33/3628 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/3678

摘要： To provide an RF coil of an MRI apparatus and improve the irradiation efficiency and the reception sensitivity of a circular polarized magnetic field with a simple structure.An RF coil has a set of input/output terminals and two loops. The two loops are disposed and capacitors in the loops are adjusted so that the linearly polarized magnetic fields generated and detected by the loops are perpendicular to each other, and the combined magnetic field of the linearly polarized magnetic fields is a circular polarized magnetic field.

摘要翻译： 提供MRI装置的RF线圈，并以简单的结构提高圆偏振磁场的照射效率和接收灵敏度。 RF线圈具有一组输入/输出端子和两个回路。 设置两个环路，并调整环路中的电容器，使得由环路产生和检测的线性极化磁场彼此垂直，并且线性极化磁场的组合磁场是圆极化磁场。