公开(公告)号：US20060001427A1

公开(公告)日：2006-01-05

申请号：US11169940

申请日：2005-06-30

申请人： Ryuya Ando ,  Mitsushi Abe ,  Hiroyuki Watanabe

发明人： Ryuya Ando ,  Mitsushi Abe ,  Hiroyuki Watanabe

IPC分类号： G01V3/00

CPC分类号： G01R33/3873

摘要： A magnetic resonance imaging apparatus and the magnet apparatus thereof comprise plural pairs of magnetic field generation sources, arranged face to face with each other, for forming a magnetic field space 3; and magnetic field homogeneity adjusting apparatuses 17 and 18 for providing homogeneity adjustment of the magnetic field formed in the magnetic field space 3. The magnetic field homogeneity adjusting apparatuses 17 and 18 contain a plurality of tapped holes 24 for installing a magnetic field homogeneity adjusting member 26 of smaller volume in a plate-formed tray made of a non-magnetic substance; and a plurality of mounts 25 for installing the magnetic field homogeneity adjusting member 27 of greater volume, these mounts being formed over the area containing a plurality of through-holes for permitting installation of a magnetic field homogeneity adjusting member 26 of smaller volume, whereby major magnetic field adjusting work can be performed independently of minor magnetic field adjusting work.

摘要翻译： 磁共振成像装置及其磁铁装置包括彼此面对面布置的多对磁场产生源，用于形成磁场空间3; 以及用于提供在磁场空间3中形成的磁场的均匀性调节的磁场均匀性调节装置17和18.磁场均匀性调节装置17和18包含多个用于安装磁场均匀性调节构件26的螺纹孔24 在由非磁性物质制成的板状托盘中的体积较小; 以及用于安装更大体积的磁场均匀性调节构件27的多个安装件25，这些安装件形成在包含多个通孔的区域上，用于允许安装较小体积的磁场均匀性调节构件26，由此主要 可以独立于小磁场调整工作进行磁场调整工作。

公开(公告)号：US07245128B2

公开(公告)日：2007-07-17

申请号：US11169940

申请日：2005-06-30

申请人： Ryuya Ando ,  Mitsushi Abe ,  Hiroyuki Watanabe

发明人： Ryuya Ando ,  Mitsushi Abe ,  Hiroyuki Watanabe

IPC分类号： G01V3/00

CPC分类号： G01R33/3873

摘要： A magnetic resonance imaging apparatus and the magnet apparatus thereof comprise plural pairs of magnetic field generation sources, arranged face to face with each other, for forming a magnetic field space 3; and magnetic field homogeneity adjusting apparatuses 17 and 18 for providing homogeneity adjustment of the magnetic field formed in the magnetic field space 3. The magnetic field homogeneity adjusting apparatuses 17 and 18 contain a plurality of tapped holes 24 for installing a magnetic field homogeneity adjusting member 26 of smaller volume in a plate-formed tray made of a non-magnetic substance; and a plurality of mounts 25 for installing the magnetic field homogeneity adjusting member 27 of greater volume, these mounts being formed over the area containing a plurality of through-holes for permitting installation of a magnetic field homogeneity adjusting member 26 of smaller volume, whereby major magnetic field adjusting work can be performed independently of minor magnetic field adjusting work.

摘要翻译： 磁共振成像装置及其磁铁装置包括彼此面对面布置的多对磁场产生源，用于形成磁场空间3; 以及用于提供在磁场空间3中形成的磁场的均匀性调整的磁场均匀性调节装置17和18。 磁场均匀性调节装置17和18包含多个用于在由非磁性物质制成的板状托盘中安装体积较小的磁场均匀性调节构件26的螺纹孔24; 以及用于安装更大体积的磁场均匀性调节构件27的多个安装件25，这些安装件形成在包含多个通孔的区域上，用于允许安装较小体积的磁场均匀性调节构件26，由此主要 可以独立于小磁场调整工作进行磁场调整工作。

公开(公告)号：US20140176138A1

公开(公告)日：2014-06-26

申请号：US14239872

申请日：2012-08-10

申请人： Yukinobu Imamura ,  Mitsushi Abe ,  Takeshi Yatsuo ,  Masanao Terada ,  Ryuya Ando ,  Takeshi Kawamura

发明人： Yukinobu Imamura ,  Mitsushi Abe ,  Takeshi Yatsuo ,  Masanao Terada ,  Ryuya Ando ,  Takeshi Kawamura

IPC分类号： G01R33/34

CPC分类号： G01R33/34092 ,  G01R33/34007 ,  G01R33/4215 ,  G01R33/56518 ,  Y10T29/49117

摘要： In a gradient magnetic field coil device including: a plurality of main coils generating in an imaging region of a magnetic field resonance imaging device a magnetic field distribution in which an intensity linearly inclines; and a plurality of shield coils, arranged on an opposite side of the imaging region across the main coils, suppressing residual magnetic field generated by the main coils on the opposite side. The plurality of main coils and the plurality of shield coils are connected in series. The device further includes a plurality of current adjusting devices, connected to the shield coils in parallel, independently adjusting currents flowing through the shield coils, respectively, to enhance symmetry of the residual magnetic field. The gradient magnetic field coil device is provided which can suppress generation of eddy current magnetic field even if there is a relative position deviation between the main coils and shield coils.

摘要翻译： 一种梯度磁场线圈装置，包括：多个主线圈，其在磁场共振成像装置的摄像区域中产生强度呈线性倾斜的磁场分布; 以及多个屏蔽线圈，其布置在主线圈上的成像区域的相对侧上，从而抑制由相反侧的主线圈产生的残余磁场。 多个主线圈和多个屏蔽线圈串联连接。 该装置还包括多个并联的屏蔽线圈的电流调节装置，分别独立地调节流过屏蔽线圈的电流，以增强残余磁场的对称性。 提供了梯度磁场线圈装置，即使在主线圈和屏蔽线圈之间存在相对位置偏差，也可以抑制涡电流磁场的产生。

公开(公告)号：US07714574B2

公开(公告)日：2010-05-11

申请号：US11942037

申请日：2007-11-19

申请人： Ryuya Ando ,  Mitsushi Abe ,  Tsutomu Yamamoto ,  Tomoo Chiba

发明人： Ryuya Ando ,  Mitsushi Abe ,  Tsutomu Yamamoto ,  Tomoo Chiba

IPC分类号： G01V3/00

CPC分类号： G01R33/3815 ,  G01R33/3804 ,  G01R33/3806 ,  G01R33/421

摘要： A superconducting magnet includes: a superconducting coil for generating a static magnetic field; a refrigerant container for containing the superconducting coil and a refrigerant; a vacuum container for holding the refrigerant container in a vacuum state; a radiation shield between the refrigerant container and the vacuum container; a refrigerator for re-liquidfying the refrigerant; and a dynamic magnetic field shield. The refrigerator includes: first and second regenerative refrigerants. The dynamic magnetic field shield is an electric good conductor and arranged around the first regenerative refrigerant along a motion axis of the first regenerative refrigerant, wherein a direction of the motion axis is aligned with a direction of a magnetic force line of the static magnetic field at the first regenerative refrigerant.

摘要翻译： 超导磁体包括：用于产生静磁场的超导线圈; 用于容纳超导线圈和制冷剂的制冷剂容器; 用于将制冷剂容器保持在真空状态的真空容器; 在制冷剂容器和真空容器之间的辐射屏蔽; 用于重新液化制冷剂的冰箱; 和动态磁场屏蔽。 冰箱包括：第一和第二再生制冷剂。 所述动态磁场屏蔽是电导体，沿着所述第一再生制冷剂的运动轴围绕所述第一再生制冷剂配置，其中所述运动轴的方向与所述静磁场的磁力线的方向对齐， 第一个再生制冷剂。

公开(公告)号：US07990661B2

公开(公告)日：2011-08-02

申请号：US12186618

申请日：2008-08-06

申请人： Yoshiya Higuchi ,  Mitsushi Abe ,  Ryuya Ando ,  Tsutomu Yamamoto ,  Takuro Honda

发明人： Yoshiya Higuchi ,  Mitsushi Abe ,  Ryuya Ando ,  Tsutomu Yamamoto ,  Takuro Honda

IPC分类号： H02H7/00 ,  H01F6/00 ,  H01F6/02

CPC分类号： G01R33/3815 ,  G01R33/288 ,  G01R33/3806 ,  G01R33/421 ,  H01F6/02

摘要： The active shield superconducting electromagnet apparatus includes: a main switching circuit in which first and second main coils, first and second shield coils, and a first superconducting persistent current switch are connected in series; a sub switching circuit in which a bypass circuit, in which a superconducting fault current limiter and a second superconducting persistent current switch are connected in series, are connected to a series circuit of the first main coil and the second main coil in parallel; a first closed circuit in which at least one of the first main coil and the first shield coil, and a first quench protection circuit are connected in series; and a second closed circuit in which one of the second main coil and the second shield coil, and a second quench protection circuit are connected in series.

摘要翻译： 有源屏蔽超导电磁铁装置包括：主开关电路，其中第一和第二主线圈，第一和第二屏蔽线圈以及第一超导持续电流开关串联连接; 其中以超导故障电流限制器和第二超导持续电流开关串联连接的旁路电路并联连接到第一主线圈和第二主线圈的串联电路; 第一闭合电路，其中第一主线圈和第一屏蔽线圈中的至少一个以及第一骤冷保护电路串联连接; 以及第二闭合回路，其中第二主线圈和第二屏蔽线圈中的一个以及第二骤冷保护电路串联连接。

公开(公告)号：US20110057655A1

公开(公告)日：2011-03-10

申请号：US12991475

申请日：2009-05-08

申请人： Ryuya Ando ,  Mitsushi Abe ,  Shogo Maeno

发明人： Ryuya Ando ,  Mitsushi Abe ,  Shogo Maeno

IPC分类号： G01R33/44

CPC分类号： G01R33/3873 ,  G01R33/3806 ,  H01F7/202

摘要： On the basis of the magnetic field intensity distribution of a magnetic field space (3), in order to homogenize the distribution, the positions and the volumes of magnetic material shims (such as shim bolts (27)) which have to be arranged on shim trays (17, 18) are first computed on a minute computational grid. Subsequently, from the distributions of the computed positions and volumes of the magnetic material shims, the local maximum values and local minimum values thereof are extracted, and the distribution areas of the volumes of the magnetic material shims with each value as the center are extracted. Then, the volumes of the magnetic materials distributed in the distribution areas are added. Finally, the results of the addition are displayed with the positions of corresponding local maximum values or the positions of corresponding local minimum values.

摘要翻译： 在磁场空间（3）的磁场强度分布的基础上，为了均匀分布，必须布置在垫片上的磁性材料垫片（例如垫片螺栓（27））的位置和体积 托盘（17,18）首先在微计算网格上计算。 随后，从计算的磁性材料垫片的位置和体积的分布中，提取其局部最大值和局部最小值，并提取每个值作为中心的磁性材料垫片的体积分布面积。 然后，分配在分配区域中的磁性材料的体积相加。 最后，添加的结果以对应的局部最大值的位置或对应的局部最小值的位置显示。

公开(公告)号：US09689938B2

公开(公告)日：2017-06-27

申请号：US14239872

申请日：2012-08-10

申请人： Yukinobu Imamura ,  Mitsushi Abe ,  Takeshi Yatsuo ,  Masanao Terada ,  Ryuya Ando ,  Takeshi Kawamura

发明人： Yukinobu Imamura ,  Mitsushi Abe ,  Takeshi Yatsuo ,  Masanao Terada ,  Ryuya Ando ,  Takeshi Kawamura

IPC分类号： G01R33/34 ,  G01R33/421 ,  G01R33/565

CPC分类号： G01R33/34092 ,  G01R33/34007 ,  G01R33/4215 ,  G01R33/56518 ,  Y10T29/49117

摘要： In a gradient magnetic field coil device including: a plurality of main coils generating in an imaging region of a magnetic field resonance imaging device a magnetic field distribution in which an intensity linearly inclines; and a plurality of shield coils, arranged on an opposite side of the imaging region across the main coils, suppressing residual magnetic field generated by the main coils on the opposite side. The plurality of main coils and the plurality of shield coils are connected in series. The device further includes a plurality of current adjusting devices, connected to the shield coils in parallel, independently adjusting currents flowing through the shield coils, respectively, to enhance symmetry of the residual magnetic field. The gradient magnetic field coil device is provided which can suppress generation of eddy current magnetic field even if there is a relative position deviation between the main coils and shield coils.

公开(公告)号：US20080180100A1

公开(公告)日：2008-07-31

申请号：US11942037

申请日：2007-11-19

申请人： Ryuya Ando ,  Mitsushi Abe ,  Tsutomu Yamamoto ,  Tomoo Chiba

发明人： Ryuya Ando ,  Mitsushi Abe ,  Tsutomu Yamamoto ,  Tomoo Chiba

IPC分类号： G01R33/3815 ,  H01F6/04 ,  F17C13/00

CPC分类号： G01R33/3815 ,  G01R33/3804 ,  G01R33/3806 ,  G01R33/421

摘要： A superconducting magnet includes: a superconducting coil for generating a static magnetic field; a refrigerant container for containing the superconducting coil and a refrigerant; a vacuum container for holding the refrigerant container in a vacuum state; a radiation shield between the refrigerant container and the vacuum container; a refrigerator for re-liquidfying the refrigerant; and a dynamic magnetic field shield. The refrigerator includes: first and second regenerative refrigerants. The dynamic magnetic field shield is an electric good conductor and arranged around the first regenerative refrigerant along a motion axis of the first regenerative refrigerant, wherein a direction of the motion axis is aligned with a direction of a magnetic force line of the static magnetic field at the first regenerative refrigerant.

摘要翻译： 超导磁体包括：用于产生静磁场的超导线圈; 用于容纳超导线圈和制冷剂的制冷剂容器; 用于将制冷剂容器保持在真空状态的真空容器; 在制冷剂容器和真空容器之间的辐射屏蔽; 用于重新液化制冷剂的冰箱; 和动态磁场屏蔽。 冰箱包括：第一和第二再生制冷剂。 所述动态磁场屏蔽是电导体，沿着所述第一再生制冷剂的运动轴围绕所述第一再生制冷剂配置，其中所述运动轴的方向与所述静磁场的磁力线的方向对齐， 第一个再生制冷剂。

公开(公告)号：US20070057667A1

公开(公告)日：2007-03-15

申请号：US11513375

申请日：2006-08-31

申请人： Ryuya Ando ,  Mitsushi Abe ,  Takeshi Nakayama ,  Tsutomu Yamamoto

发明人： Ryuya Ando ,  Mitsushi Abe ,  Takeshi Nakayama ,  Tsutomu Yamamoto

IPC分类号： G01N27/84

CPC分类号： G01R33/421 ,  G01R33/3806

摘要： A magnet device has main coils in a pair positioned facing each other to form a static magnetic field space in between and external magnetic flux shielding coils placed coaxially to the main coils. The external magnetic flux shielding coils have a first coil group having a small coefficient of coil coupling and a second coil group having a coefficient of coil coupling greater than that of the first coil group. The first coil group is connected in series to the second coil group. External magnetic flux entering the magnetic field imaging space formed by main coils in a pair positioned facing each other is effectively warded off.

摘要翻译： 磁体装置具有彼此面对的主线圈，以在其间形成静磁场空间，并且与主线圈同轴放置的外部磁通屏蔽线圈。 外部磁通屏蔽线圈具有线圈耦合系数小的第一线圈组和具有大于第一线圈组的线圈耦合系数的第二线圈组。 第一线圈组与第二线圈组串联连接。 有效地消除了进入由成对定位的主线圈形成的磁场成像空间的外部磁通。

公开(公告)号：US08947089B2

公开(公告)日：2015-02-03

申请号：US12991495

申请日：2009-05-08

申请人： Mitsushi Abe ,  Ryuya Ando ,  Takeshi Nakayama

发明人： Mitsushi Abe ,  Ryuya Ando ,  Takeshi Nakayama

IPC分类号： G01R33/3873 ,  G01R33/3875 ,  G01R33/389 ,  G01R33/383 ,  G01R33/38 ,  A61B5/055 ,  H01F7/02

CPC分类号： G01R33/3873 ,  A61B5/055 ,  G01R33/38 ,  G01R33/3806 ,  G01R33/383 ,  G01R33/3875 ,  G01R33/389 ,  H01F7/02 ,  H01F7/0284

摘要： A measured error magnetic field distribution is divided into eigen-mode components obtained by a singular decomposition and iron piece arrangements corresponding to respective modes are combined and arranged on a shim-tray. An eigen-mode to be corrected is selected in accordance with an attainable magnetic field accuracy (homogeneity) and appropriateness of arranged volume of the iron pieces. Because the adjustment can be made with the attainable magnetic field accuracy (homogeneity) being known, an erroneous adjustment can also be known, and the adjustment is automatically done during repeated adjustments. As a result, an apparatus with a high accuracy can be provided. In addition, there is an advantageous effect of being able to detect a poor magnet earlier by checking the attainable homogeneity.

摘要翻译： 测量的误差磁场分布被划分为通过单个分解获得的特征模式分量，并且将对应于各个模式的铁片布置组合并布置在垫片托盘上。 根据可获得的磁场精度（均匀性）和铁片的排列体积的适当性来选择要校正的本征模式。 由于可以通过已知的可获得的磁场精度（均匀性）进行调整，所以也可以知道错误的调整，并且在重复调整期间自动进行调整。 结果，可以提供高精度的装置。 此外，通过检查可获得的均匀性，能够更早地检测不良磁体是有利的。