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1. 发明申请

US20120299594A1 ANTENNA DEVICE 有权
标题翻译：天线设备
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。

2. 发明授权

US09599685B2 Antenna device and magnetic resonance imaging device for suppressing absorption rate of irradiated waves 有权
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.

3. 发明申请

US20130221968A1 ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE 有权
标题翻译：天线装置和磁共振成像装置
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。

4. 发明授权

US09182463B2 Magnetic resonance examination apparatus and antenna device 有权
标题翻译：磁共振检查仪和天线装置
公开(公告)号：US09182463B2
公开(公告)日：2015-11-10
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： G01R33/34
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。

5. 发明授权

US08648597B2 Antenna system and magnetic resonance imaging apparatus 有权
标题翻译：天线系统和磁共振成像装置
公开(公告)号：US08648597B2
公开(公告)日：2014-02-11
申请号：US12702666
申请日：2010-02-09
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： G01R33/3456
摘要： An RF coil is provided with a hollow-shaped outer conductive element and strip-shaped conductive elements disposed along the outer conductive element in the axial direction. The strip-shaped conductive elements are disposed with uneven intervals to secure an internal space at a position where the strip-shaped conductive elements are not disposed. In order to obtain uniform sensitivity at the center section of the RF coil, the strip-shaped conductive elements and the outer conductive element are electrically connected via capacitors of which capacitances are adjusted so that a magnetic field component perpendicular to the center axis should be generated at a desired resonance frequency, and the strip-shaped conductive elements are axisymmetrically disposed with respect to the center axis of the outer conductive element. As a result, a comfortable examination space in a tunnel type MRI apparatus is achieved without increasing the manufacturing cost of the MRI apparatus.
摘要翻译： RF线圈设置有中空形的外导电元件和沿轴向方向沿着外导电元件设置的条形导电元件。带状导电元件以不均匀的间隔设置，以将内部空间固定在未设置条形导电元件的位置。为了在RF线圈的中心部分获得均匀的灵敏度，条状导电元件和外部导电元件通过电容被调节的电容器电连接，使得应当产生垂直于中心轴的磁场分量并且所述带状导电元件相对于外导电元件的中心轴线对称设置。结果，在不增加MRI装置的制造成本的情况下实现隧道式MRI装置中的舒适的检查空间。

6. 发明授权

US08947084B2 Antenna device and magnetic resonance imaging device 有权
标题翻译：天线装置和磁共振成像装置
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。

7. 发明申请

US20110204890A1 ANTENNA DEVICE AND MAGNETIC RESONANCE IMAGING DEVICE 有权
标题翻译：天线装置和磁共振成像装置
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。

8. 发明授权

US07808241B2 Magnetic resonance imaging apparatus 有权
标题翻译：磁共振成像装置
公开(公告)号：US07808241B2
公开(公告)日：2010-10-05
申请号：US12227063
申请日：2006-12-26
申请人： Masayoshi Dohata , Hisaaki Ochi , Yoshiyuki Miyamoto
发明人： Masayoshi Dohata , Hisaaki Ochi , Yoshiyuki Miyamoto
IPC分类号： G01V3/00
CPC分类号： G01R33/3415 , G01R33/34053 , G01R33/365 , G01R33/3657 , G01R33/3664 , G01R33/3806 , G01R33/5611 , G01R33/56375 , G01R33/56383
摘要： A vertical magnetic field type MRI apparatus is capable of high-speed-imaging a large cross section such as a whole human body while suppressing an increase in the number of channels and maintaining sensitivity to a deep portion of a subject to be high. A receiving coil is composed of a plurality of sub coils. A first sub coil (3-1) of the receiving coil is arranged in a first plane (1001) including an axis substantially parallel to the direction of a static magnetic field and forms a first current loop around the surface of the subject. A second sub coil (5-1) of the receiving coil is constituted by a pair of conductor loops (5-2, 5-3) that sandwich the subject in the vicinities of the surface of the subject and are arranged substantially symmetrically each other. The conductor loops have respective cross points (5-4, 5-5). The conductor loops are arranged with the first sub coil to ensure that the cross points are located in the first plane in which the current loop of the first sub coil is provided. An electromagnetic coupling between the first and second sub coils is not generated. The second sub coil exhibits a sensitivity distribution symmetrical to the direction of the static magnetic field. The first and second sub coils are arranged as a basic configuration and combined with each other to ensure that an electromagnetic coupling with another sub coil that exhibits a sensitivity distribution symmetrical to x and y directions is suppressed.
摘要翻译：垂直磁场型MRI装置能够在抑制通道数量的增加并且保持对被摄体的深部的敏感性高的同时，对诸如整个人体的大截面进行高速成像。接收线圈由多个子线圈组成。接收线圈的第一子线圈（3-1）布置在包括基本上平行于静磁场的方向的轴线的第一平面（1001）中，并且围绕被摄体的表面形成第一电流回路。接收线圈的第二子线圈（5-1）由一对导体环（5-2,5-3）构成，该对导体环（5-2,5-3）将被摄体夹在被检体的表面附近并彼此大致对称。导体环具有各自的交叉点（5-4,5-5）。导体环与第一子线圈一起布置以确保交叉点位于提供第一子线圈的电流环的第一平面中。不产生第一和第二子线圈之间的电磁耦合。第二子线圈表现出与静磁场方向对称的灵敏度分布。第一和第二子线圈被布置为基本配置并且彼此组合以确保与另外的子线圈的电磁耦合具有与x和y方向对称的灵敏度分布。

9. 发明申请

US20090160441A1 Magnetic Resonance Imaging Apparatus 有权
标题翻译：磁共振成像仪
公开(公告)号：US20090160441A1
公开(公告)日：2009-06-25
申请号：US12227063
申请日：2006-12-26
申请人： Masayoshi Dohata , Hisaaki Ochi , Yoshiyuki Miyamoto
发明人： Masayoshi Dohata , Hisaaki Ochi , Yoshiyuki Miyamoto
IPC分类号： G01R33/34 , G01R33/48
CPC分类号： G01R33/3415 , G01R33/34053 , G01R33/365 , G01R33/3657 , G01R33/3664 , G01R33/3806 , G01R33/5611 , G01R33/56375 , G01R33/56383
摘要： A vertical magnetic field type MRI apparatus is capable of high-speed-imaging a large cross section such as a whole human body while suppressing an increase in the number of channels and maintaining sensitivity to a deep portion of a subject to be high. A receiving coil is composed of a plurality of sub coils. A first sub coil (3-1) of the receiving coil is arranged in a first plane (1001) including an axis substantially parallel to the direction of a static magnetic field and forms a first current loop around the surface of the subject. A second sub coil (5-1) of the receiving coil is constituted by a pair of conductor loops (5-2, 5-3) that sandwich the subject in the vicinities of the surface of the subject and are arranged substantially symmetrically each other. The conductor loops have respective cross points (5-4, 5-5). The conductor loops are arranged with the first sub coil to ensure that the cross points are located in the first plane in which the current loop of the first sub coil is provided. An electromagnetic coupling between the first and second sub coils is not generated. The second sub coil exhibits a sensitivity distribution symmetrical to the direction of the static magnetic field. The first and second sub coils are arranged as a basic configuration and combined with each other to ensure that an electromagnetic coupling with another sub coil that exhibits a sensitivity distribution symmetrical to x and y directions is suppressed.
摘要翻译：垂直磁场型MRI装置能够在抑制通道数量的增加并且保持对被摄体的深部的敏感性高的同时，对诸如整个人体的大截面进行高速成像。接收线圈由多个子线圈组成。接收线圈的第一子线圈（3-1）布置在包括基本上平行于静磁场的方向的轴线的第一平面（1001）中，并且围绕被摄体的表面形成第一电流回路。接收线圈的第二子线圈（5-1）由一对导体环（5-2,5-3）构成，该对导体环（5-2,5-3）将被摄体夹在被检体的表面附近并彼此大致对称。导体环具有各自的交叉点（5-4,5-5）。导体环与第一子线圈一起布置以确保交叉点位于提供第一子线圈的电流环的第一平面中。不产生第一和第二子线圈之间的电磁耦合。第二子线圈表现出与静磁场方向对称的灵敏度分布。第一和第二子线圈被布置为基本配置并且彼此组合以确保与另外的子线圈的电磁耦合具有与x和y方向对称的灵敏度分布。

10. 发明授权

US08035383B2 Magnetic resonance imaging apparatus and RF coil for magnetic resonance imaging apparatus 有权
标题翻译：用于磁共振成像装置的磁共振成像装置和RF线圈
公开(公告)号：US08035383B2
公开(公告)日：2011-10-11
申请号：US12064514
申请日：2006-12-21
申请人： Hisaaki Ochi , Masayoshi Dohata , Atsushi Ninomiya , Yoshiyuki Miyamoto
发明人： Hisaaki Ochi , Masayoshi Dohata , Atsushi Ninomiya , Yoshiyuki Miyamoto
IPC分类号： G01V3/00
CPC分类号： G01R33/34046 , G01R33/34069 , G01R33/3415 , G01R33/3806 , G01R33/5611
摘要： This invention provides a receiving coil that allows a high-quality image of high depth sensitivity to be obtained during vertical magnetic field MRI without limiting selection of a cross section to be imaged and of a phase-encoding axis. A subject's field of view is broadened without deterioration of the coil characteristics. Two orthogonal solenoid coils (3-1 and 4-1) and sub-coils (5-1, 6-1, and 7-1) whose sensitivity distributions each become an odd function in an x-direction, a y-direction, and a z-direction, respectively, with respect to the origin of the sensitivity distribution of each of the solenoid coils are used as multiple sub-coils to construct the receiving coil. This receiving coil is suitable for a high-speed imaging method in which an image is acquired using reduced phase encoding and the image is reconstructed using image folding. In addition, the subject's field of view can be broadened by arranging conductors of the coil appropriately.
摘要翻译：本发明提供了一种接收线圈，其允许在垂直磁场MRI期间获得高深度灵敏度的高质量图像，而不限制要成像的横截面和相位编码轴的选择。受试者的视野扩大而不会降低线圈特性。两个正交电磁线圈（3-1和4-1）和子线圈（5-1,6-1和7-1）的灵敏度分布在x方向，y方向，和相对于每个螺线管线圈的灵敏度分布的原点的z方向被用作构成接收线圈的多个子线圈。该接收线圈适用于使用减少的相位编码获取图像并且使用图像折叠重建图像的高速成像方法。此外，可以通过适当地布置线圈的导体来扩大被摄体的视野。

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