公开(公告)号：US20100194393A1

公开(公告)日：2010-08-05

申请号：US12644470

申请日：2009-12-22

申请人： Mitsushi Abe ,  Yukinobu Imamura ,  Akira Kurome

发明人： Mitsushi Abe ,  Yukinobu Imamura ,  Akira Kurome

IPC分类号： G01R33/44

CPC分类号： G01R33/385 ,  A61B5/055 ,  A61B5/0555 ,  G01R33/3806 ,  G01R33/3854

摘要： There is provided a gradient coil device which can suppress any generation of an error magnetic field and thus an eddy current, and which can improve the image quality of a cross-sectional image. An MRI device includes a first coil generating a linear magnetic field distribution at an imaging region of the MRI device, and a second coil which suppresses any leakage of a magnetic field from the first coil to a static-magnetic-field coil device that generates a uniform magnetic field distribution at the imaging region.

摘要翻译： 提供了一种梯度线圈装置，其可以抑制任何误差磁场的产生，从而可以抑制涡流，并且可以提高横截面图像的图像质量。 MRI装置包括在MRI装置的成像区域产生线性磁场分布的第一线圈和抑制磁场从第一线圈到静电磁场线圈装置的任何泄漏的第二线圈，该静态磁场线圈装置产生 在成像区域具有均匀的磁场分布。

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：US20080074112A1

公开(公告)日：2008-03-27

申请号：US11844519

申请日：2007-08-24

申请人： Mitsushi Abe ,  Yukinobu Imamura ,  Takeshi Yatsuo

发明人： Mitsushi Abe ,  Yukinobu Imamura ,  Takeshi Yatsuo

IPC分类号： G01R33/341 ,  G01R33/28

CPC分类号： G01R33/385 ,  G01R33/4215

摘要： The gradient coil for a magnetic resonance imaging apparatus is adapted to encode information on a spatial position of a subject to be inspected into a nuclear magnetic resonance signal. The gradient coil includes a primary gradient coil and a shielded gradient coil. The primary gradient coil generates a gradient magnetic field in the imaging area. The shielded gradient coil is located on the side opposite to the imaging area relative to the primary gradient coil and cancels the gradient magnetic field generated by the primary magnetic field. The shielded gradient coil has a first area including a central axis perpendicularly extending through the central portion of the imaging area and a second area located on the side of the outer circumference of the first area. The second area is more inclined toward the imaging area than the first area.

摘要翻译： 用于磁共振成像装置的梯度线圈适于将待检查对象的空间位置的信息编码为核磁共振信号。 梯度线圈包括初级梯度线圈和屏蔽梯度线圈。 主梯度线圈在成像区域中产生梯度磁场。 屏蔽梯度线圈相对于主梯度线圈位于与成像区域相对的一侧，并且抵消由一次磁场产生的梯度磁场。 屏蔽梯度线圈具有包括垂直延伸穿过成像区域的中心部分的中心轴线的第一区域和位于第一区域的外圆周侧的第二区域。 第二个区域比第一个区域更倾向于成像区域。

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：US09618592B2

公开(公告)日：2017-04-11

申请号：US14237190

申请日：2012-08-10

申请人： Takeshi Kawamura ,  Yukinobu Imamura ,  Mitsushi Abe ,  Takuro Honda ,  Hiroyuki Takeuchi

发明人： Takeshi Kawamura ,  Yukinobu Imamura ,  Mitsushi Abe ,  Takuro Honda ,  Hiroyuki Takeuchi

IPC分类号： G01V3/00 ,  G01R33/389 ,  G01R33/385 ,  G01R33/565 ,  G01R33/421

CPC分类号： G01R33/389 ,  G01R33/3854 ,  G01R33/4215 ,  G01R33/56518

摘要： A device includes: a static magnetic field generating device including static magnetic field generating sources generating a homogeneous magnetic field in a space; gradient magnetic field generating sources superimposing a gradient magnetic field on the homogeneous magnetic field, and conductor rings arranged between the static magnetic field generating sources and the gradient magnetic field generating sources in a pair of arranging regions on both sides in a direction of the homogeneous magnetic field in a region where the homogeneous magnetic field is generated (imaging region), respectively, the conductor rings being separated from each other and making a pair. The conductor rings are mechanically connected to the gradient magnetic field generating device or the static magnetic field generating device. This provides an MRI device 1 capable of reduction in vibration with suppression of the image quality deterioration of the tomographic images.

公开(公告)号：US09541617B2

公开(公告)日：2017-01-10

申请号：US13979542

申请日：2012-01-13

申请人： Masanao Terada ,  Mitsushi Abe ,  Yukinobu Imamura ,  Hiroyuki Takeuchi ,  Akira Kurome

发明人： Masanao Terada ,  Mitsushi Abe ,  Yukinobu Imamura ,  Hiroyuki Takeuchi ,  Akira Kurome

IPC分类号： G01R33/385 ,  G01R33/421

CPC分类号： G01R33/385 ,  G01R33/4215

摘要： A gradient coil device includes a major axis gradient coil, having an ellipse in a cross section generating a gradient magnetic field inclined in a major axis direction of the ellipse at a magnetic field space; and a minor axis gradient coil, having an ellipse in a cross section generating a gradient magnetic field inclined in a minor axis direction of the ellipse at the magnetic field space. A length of the minor axis field coil in the center axis direction is shorter than a length of the major axis gradient coil in the center axis direction. A maximum value of a residual magnetic field generated by the minor axis gradient coil at a space outside the magnetic field space is equal to or smaller than a maximum value of a residual magnetic field generated by the major axis gradient coil at a space outside the magnetic field space.

摘要翻译： 梯度线圈装置包括长轴梯度线圈，在截面上具有椭圆形状，在磁场空间产生沿椭圆的长轴方向倾斜的梯度磁场; 以及短轴倾斜线圈，在截面中具有椭圆形状，在磁场空间产生在椭圆的短轴方向上倾斜的倾斜磁场。 短轴励磁线圈的中心轴方向的长度比中心轴方向的长轴梯度线圈的长度短。 在磁场空间外的空间处由短轴梯度线圈产生的剩余磁场的最大值等于或小于在磁性空间外的空间处由长轴梯度线圈产生的残余磁场的最大值 场地空间。

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。

公开(公告)号：US20140210476A1

公开(公告)日：2014-07-31

申请号：US14237190

申请日：2012-08-10

申请人： Takeshi Kawamura ,  Yukinobu Imamura ,  Mitsushi Abe ,  Takuro Honda ,  Hiroyuki Takeuchi

发明人： Takeshi Kawamura ,  Yukinobu Imamura ,  Mitsushi Abe ,  Takuro Honda ,  Hiroyuki Takeuchi

IPC分类号： G01R33/389

CPC分类号： G01R33/389 ,  G01R33/3854 ,  G01R33/4215 ,  G01R33/56518

摘要： A device includes: a static magnetic field generating device including static magnetic field generating sources generating a homogeneous magnetic field in a space; gradient magnetic field generating sources superimposing a gradient magnetic field on the homogeneous magnetic field, and conductor rings arranged between the static magnetic field generating sources and the gradient magnetic field generating sources in a pair of arranging regions on both sides in a direction of the homogeneous magnetic field in a region where the homogeneous magnetic field is generated (imaging region), respectively, the conductor rings being separated from each other and making a pair. The conductor rings are mechanically connected to the gradient magnetic field generating device or the static magnetic field generating device. This provides an MRI device 1 capable of reduction in vibration with suppression of the image quality deterioration of the tomographic images.

摘要翻译： 一种装置包括：静态磁场产生装置，其包括在空间中产生均匀磁场的静态磁场产生源; 在均匀磁场上叠加梯度磁场的梯度磁场产生源和在均匀磁场的方向上的两侧的一对排列区域中布置在静态磁场产生源和梯度磁场产生源之间的导体环 （成像区域）的区域中，导体环彼此分离并形成一对。 导体环与梯度磁场产生装置或静磁场产生装置机械连接。 这提供了能够通过抑制断层图像的图像质量劣化来减少振动的MRI装置1。

公开(公告)号：US20120268119A1

公开(公告)日：2012-10-25

申请号：US13511786

申请日：2010-11-24

申请人： Mitsushi Abe ,  Ryuya Ando

发明人： Mitsushi Abe ,  Ryuya Ando

IPC分类号： G01R33/44

CPC分类号： G01R33/3873 ,  G01R33/3875

摘要： 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 grasped, an erroneous adjustment can be grasped, and the adjustment is automatically done during repeated adjustment. When the magnetic field adjustment is carried out with support by the method of the present invention according to the first and second embodiments or an apparatus including this method therein, the magnetic field adjustment can be surely completed. As a result, the apparatus with a high accuracy can be provided. In addition, there is an advantageous effect of earlier detection of a poor magnet by checking the attainable homogeneity. They are applicable to magnet devices for the horizontal magnetic field type, being an open type MRI, and vertical magnetic field type MRI.

摘要翻译： 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。 由于能够以可获得的磁场精度（均匀性）进行调整，因此可以掌握错误的调整，并且在重复调整期间自动进行调整。 当通过根据第一和第二实施例的本发明的方法的支持来执行磁场调整时，或者包括该方法的装置，可以可靠地完成磁场调整。 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，有利于早期检测不良磁体的效果。 它们适用于水平磁场型的磁体装置，是开放型MRI，垂直磁场型MRI。

公开(公告)号：US20110089943A1

公开(公告)日：2011-04-21

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： G01R33/44

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。