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1. 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.

2. 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。

3. 发明授权

US09638771B2 High-frequency coil and magnetic resonance imaging device employing same 有权
公开(公告)号：US09638771B2
公开(公告)日：2017-05-02
申请号：US13811979
申请日：2011-07-25
申请人： Yoshihisa Soutome , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi , Hideta Habara
发明人： Yoshihisa Soutome , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi , Hideta Habara
IPC分类号： G01R33/34 , A61B5/055 , G01R33/345 , G01R33/36 , G01R33/422
CPC分类号： G01R33/34 , A61B5/055 , G01R33/34046 , G01R33/34084 , G01R33/3453 , G01R33/365 , G01R33/3657 , G01R33/3678 , G01R33/422
摘要： A technique is provided to reserve large examination space in the tunnel type MRI apparatus, without increasing production cost nor reducing significantly irradiation efficiency and homogeneity in an irradiation distribution within an imaging region. The present invention provides an RF coil unit in which four partial cylindrical coils are placed with a gap therebetween in the circumferential direction inside a cylindrical RF shield, in such a manner that two pairs of the partial cylindrical coils are opposed to each other, and magnetic fields produced by the individual partial cylindrical coils are combined, thereby producing a circularly polarized wave field or an elliptically polarized wave field. The partial cylindrical coil is provided with a partial cylindrical conductor, multiple first conductors substantially parallel with the central axis of the RF shield, multiple capacitors connecting both ends of the first conductors with the partial cylindrical conductor, and a second conductor adjacent to at least one of the ends of the first conductor. The partial cylindrical coils are respectively provided with high frequency signals having a desired amplitude ratio and phase difference, while a reference frequency thereof being identical.

4. 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。

5. 发明申请

US20130119991A1 HIGH-FREQUENCY COIL AND MAGNETIC RESONANCE IMAGING DEVICE EMPLOYING SAME 有权
标题翻译：使用其的高频线圈和磁共振成像装置
公开(公告)号：US20130119991A1
公开(公告)日：2013-05-16
申请号：US13811979
申请日：2011-07-25
申请人： Yoshihisa Soutome , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi , Hideta Habara
发明人： Yoshihisa Soutome , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi , Hideta Habara
IPC分类号： G01R33/34
CPC分类号： G01R33/34 , A61B5/055 , G01R33/34046 , G01R33/34084 , G01R33/3453 , G01R33/365 , G01R33/3657 , G01R33/3678 , G01R33/422
摘要： A technique is provided to reserve large examination space in the tunnel type MRI apparatus, without increasing production cost nor reducing significantly irradiation efficiency and homogeneity in an irradiation distribution within an imaging region. The present invention provides an RF coil unit in which four partial cylindrical coils are placed with a gap therebetween in the circumferential direction inside a cylindrical RF shield, in such a manner that two pairs of the partial cylindrical coils are opposed to each other, and magnetic fields produced by the individual partial cylindrical coils are combined, thereby producing a circularly polarized wave field or an elliptically polarized wave field. The partial cylindrical coil is provided with a partial cylindrical conductor, multiple first conductors substantially parallel with the central axis of the RF shield, multiple capacitors connecting both ends of the first conductors with the partial cylindrical conductor, and a second conductor adjacent to at least one of the ends of the first conductor. The partial cylindrical coils are respectively provided with high frequency signals having a desired amplitude ratio and phase difference, while a reference frequency thereof being identical.
摘要翻译：提供了一种在隧道式MRI装置中预留大的检查空间的技术，而不增加成本区域内的照射分布的生产成本，降低照射效率和均匀性。本发明提供了一种RF线圈单元，其中四个部分圆柱形线圈在圆柱形RF屏蔽内沿圆周方向放置有间隙，使得两对部分圆柱形线圈彼此相对，并且磁性由各个部分圆柱形线圈产生的磁场组合，从而产生圆偏振波场或椭圆偏振波场。部分圆柱形线圈设置有部分圆柱形导体，多个第一导体基本上平行于RF屏蔽的中心轴线，多个电容器连接第一导体的两端与部分圆柱形导体，第二导体与至少一个的第一导体的端部。部分圆柱形线圈分别设置有具有期望的振幅比和相位差的高频信号，而其参考频率相同。

6. 发明申请

US20120262173A1 HIGH-FREQUENCY COIL UNIT AND MAGNETIC RESONANCE IMAGING DEVICE 有权
标题翻译：高频线圈单元和磁共振成像装置
公开(公告)号：US20120262173A1
公开(公告)日：2012-10-18
申请号：US13512090
申请日：2010-11-29
申请人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
发明人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
IPC分类号： G01R33/34 , G01R33/48
CPC分类号： G01R33/34046 , G01R33/34053 , G01R33/34076 , G01R33/3453 , G01R33/3657 , G01R33/3678
摘要： There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.
摘要翻译：提供了一种用于在隧道式MRI装置中确保大的检查空间的技术，而不会增加制造成本，并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。在部分圆柱形RF线圈的两个梯级之间，该线圈对应于部分被去除的圆柱形RF线圈，设置有产生磁场的半环，该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。此外，具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。

7. 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。

8. 发明授权

US09274189B2 High-frequency coil unit and magnetic resonance imaging device 有权
标题翻译：高频线圈单元和磁共振成像装置
公开(公告)号：US09274189B2
公开(公告)日：2016-03-01
申请号：US13512090
申请日：2010-11-29
申请人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
发明人： Yoshihisa Soutome , Hideta Habara , Yoshitaka Bito , Hiroyuki Takeuchi , Tetsuhiko Takahashi , Hisaaki Ochi
IPC分类号： G01R33/34 , G01R33/48 , G01R33/345 , G01R33/36
CPC分类号： G01R33/34046 , G01R33/34053 , G01R33/34076 , G01R33/3453 , G01R33/3657 , G01R33/3678
摘要： There is provided a technique for securing a large examination space in a tunnel type MRI device without inviting increase of manufacturing cost and without significantly reducing irradiation efficiency or uniformity of the irradiation intensity distribution in an imaging region. Between rungs of a partially cylindrical RF coil, which coil corresponds to a cylindrical RF coil of which part is removed, there are disposed half-loops generating magnetic fields, which are synthesized with magnetic fields generated by loops constituted by adjacent rungs of the partially cylindrical RF coil and rings connecting the rungs to generate a circularly polarized or elliptically polarized magnetic field. Further, high-frequency signals of the same reference frequency having a desired amplitude ratio and phase difference are supplied to the partially cylindrical RF coils and half-loops.
摘要翻译：提供了一种用于在隧道式MRI装置中确保大的检查空间的技术，而不会增加制造成本，并且不显着降低成像区域中的照射强度分布的照射效率或均匀性。在部分圆柱形RF线圈的两个梯级之间，该线圈对应于部分被去除的圆柱形RF线圈，设置有产生磁场的半环，该磁场由具有由部分圆柱形的相邻梯级构成的环产生的磁场合成 RF线圈和环连接梯级以产生圆偏振或椭圆偏振磁场。此外，具有期望幅度比和相位差的相同参考频率的高频信号被提供给部分圆柱形RF线圈和半环。

9. 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。

10. 发明授权

US09726744B2 Magnetic resonance imaging equipment, high frequency magnetic field irradiation method and program 有权
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.

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