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：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：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°。

公开(公告)号：US09684044B2

公开(公告)日：2017-06-20

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 ,  G01R33/3415 ,  G01R33/345 ,  G01R33/36

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.

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：US08089280B2

公开(公告)日：2012-01-03

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： G01V3/00

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°。

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。