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1. 发明申请

US20120086452A1 RF COIL AND MAGNETIC RESONANCE IMAGING APPARATUS 审中-公开
标题翻译：射频线圈和磁共振成像装置
公开(公告)号：US20120086452A1
公开(公告)日：2012-04-12
申请号：US13378099
申请日：2010-06-21
申请人： Masayoshi Dohata , Shinichiro Suzuki , Manabu Mochizuki
发明人： Masayoshi Dohata , Shinichiro Suzuki , Manabu Mochizuki
IPC分类号： G01R33/341
CPC分类号： G01R33/3456
摘要： It is an object of the present invention to provide an RF coil and an MRI apparatus capable of ensuring a wide imaging space and excellent in terms of allowing maintenance at the time of installation or failure. In order to do so, an RF coil of the present invention includes a cylindrical outer conductor and a plurality of rung conductors disposed inside the outer conductor along a circumferential direction of the outer conductor. In addition, each of the plurality of rung conductors is electrically connected to the outer conductor through a capacitor so as to form an electrical loop. The outer conductor is divided into a plurality of portions in the circumferential direction and is characterized in that the numbers of rung conductors disposed in at least two divided portions are different. In addition, an MRI apparatus of the present invention includes such an RF coil.
摘要翻译：本发明的一个目的是提供一种能够确保宽的成像空间并且在安装或故障时允许维护方面优异的RF线圈和MRI装置。为了这样做，本发明的RF线圈包括圆柱形外部导体和沿外部导体的圆周方向设置在外部导体内部的多个梯形导体。此外，多个梯形导体中的每一个通过电容器电连接到外导体，以形成电环路。外导体在圆周方向上分成多个部分，其特征在于，设置在至少两个分割部分中的梯形导体的数量不同。此外，本发明的MRI装置包括这样的RF线圈。

2. 外观设计

USD591862S1 Radio frequency coil for magnetic resonance imaging apparatus 有权
标题翻译：用于磁共振成像装置的射频线圈
公开(公告)号：USD591862S1
公开(公告)日：2009-05-05
申请号：US29318339
申请日：2008-05-19
申请人： Takeshi Taniguchi , Shinichiro Suzuki , Takahide Shimoda , Masayoshi Dohata , Daisuke Yokoyama
设计人： Takeshi Taniguchi , Shinichiro Suzuki , Takahide Shimoda , Masayoshi Dohata , Daisuke Yokoyama

3. 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。

4. 发明申请

US20110181287A1 MAGNETIC RESONANCE IMAGING APPARATUS 有权
标题翻译：磁共振成像装置
公开(公告)号：US20110181287A1
公开(公告)日：2011-07-28
申请号：US13122593
申请日：2009-10-08
申请人： Kosuke Ito , Takayuki Abe , Masayoshi Dohata
发明人： Kosuke Ito , Takayuki Abe , Masayoshi Dohata
IPC分类号： G01R33/44
CPC分类号： A61B5/055 , G01R33/288
摘要： A magnetic resonance imaging apparatus comprises: static magnetic field generation means which generates a static magnetic field in an imaging space where an object to be examined is placed; gradient magnetic field generation means which generates a gradient magnetic field in the imaging space; high-frequency magnetic field generation means which generates a high-frequency magnetic field in the imaging space; calculation means which calculates an amount of the electromagnetic wave absorbed by the object when the high-frequency magnetic field is irradiated to the object; and a measurement means which measures a characteristic of the high-frequency magnetic field generation means.The calculation means calculates the amount of the electromagnetic wave absorbed by the object according to the characteristic of the high-frequency magnetic field generation means measured by the measurement means.
摘要翻译：磁共振成像装置包括：静电磁场产生装置，其在放置被检体的成像空间中产生静磁场; 梯度磁场产生装置，其在成像空间中产生梯度磁场; 在成像空间中产生高频磁场的高频磁场产生装置; 计算装置，其计算当所述高频磁场照射到所述物体时被所述物体吸收的电磁波的量; 以及测量高频磁场产生装置的特性的测量装置。计算装置根据由测量装置测量的高频磁场产生装置的特性来计算被物体吸收的电磁波的量。

5. 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。

6. 发明申请

US20110026801A1 MAGNETIC RESONANCE IMAGING APPARATUS, RECEIVING COIL AND METHOD OF MANUFACTURING THE COIL 有权
标题翻译：磁共振成像装置，接收线圈及制造线圈的方法
公开(公告)号：US20110026801A1
公开(公告)日：2011-02-03
申请号：US12937314
申请日：2009-04-07
申请人： Masayoshi Dohata , Shizuka Nagai , Daisuke Yokoyama
发明人： Masayoshi Dohata , Shizuka Nagai , Daisuke Yokoyama
IPC分类号： G06K9/00
CPC分类号： G01R33/34046 , G01R33/34007 , G01R33/34084 , G01R33/3415 , G01R33/3678
摘要： A magnetic resonance imaging apparatus is provided, characterized by: one pair of static magnetic field generating means disposed sandwiching a space in which a test object is placed; magnetic field generating means configured to apply a high-frequency magnetic field and a gradient magnetic field to the test object placed in the static magnetic field; and receiving means configured to receive a nuclear magnetic resonance signal generated from the test object, and characterized in that: the receiving means includes a receiving coil having a predetermined coil pattern and capable of being shaped into a cylinder; the receiving coil includes flexible parts and rigid parts alternately disposed along the circumference direction when shaped into the cylinder; and the flexible parts include a flexible substrate on which a portion of the predetermined coil pattern is mounted and a air-bubbles-containing resin section for covering the both surfaces of the flexible substrate.
摘要翻译：提供了一种磁共振成像装置，其特征在于：一对静电磁场产生装置，设置成夹着放置测试对象的空间; 磁场产生装置，被配置为向放置在静磁场中的测试对象施加高频磁场和梯度磁场; 以及接收装置，被配置为接收从所述测试对象产生的核磁共振信号，并且其特征在于：所述接收装置包括具有预定线圈图案并且能够成形为圆筒的接收线圈; 接收线圈包括当成形为圆筒时沿着圆周方向交替布置的柔性部件和刚性部件; 并且柔性部件包括其上安装有预定线圈图案的一部分的柔性基板和用于覆盖柔性基板的两个表面的含气泡的树脂部分。

7. 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。

8. 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.

9. 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。

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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