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：US20120176137A1

公开(公告)日：2012-07-12

申请号：US13391066

申请日：2010-08-26

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

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

IPC分类号： G01R33/381

CPC分类号： G01R33/385 ,  G01R33/4215

摘要： In the magnetic resonance imaging device, the distance between the first and second coils is different in the circumferential direction and has a first region (A1) (θ=0, π) and a second region (A2) (θ=π/2) narrower than the first region (A1). In the first coil, wiring patterns (17a, 17b) on the side of a zero-plane (F0) passing through the center of the first coil and perpendicular to the axis direction (z-axis direction) meander in the circumferential direction such that the wiring patterns (17a, 17b) depart from the zero-plane (F0) in the first region (A1) and approach the zero-plane (F0) in the second region (A2). This provides a gradient magnetic field coil capable of configuring wiring patterns without using a loop coil that does not pass through the z-axis.

摘要翻译： 在磁共振成像装置中，第一和第二线圈之间的距离在圆周方向上不同，并且具有第一区域（A1）（＆eta; = 0，＆amp; pgr）和第二区域（A2）（＆Thetas; =＆pgr ; / 2）比第一区域（A1）窄。 在第一线圈中，通过第一线圈的中心并且垂直于轴线方向（z轴方向）的零平面（F0）侧的布线图案（17a，17b）在圆周方向上弯曲，使得 布线图案（17a，17b）从第一区域（A1）中的零平面（F0）偏离并接近第二区域（A2）中的零平面（F0）。 这提供了能够配置布线图案而不使用不通过z轴的环形线圈的梯度磁场线圈。

公开(公告)号：US20100321019A1

公开(公告)日：2010-12-23

申请号：US12866327

申请日：2009-01-29

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

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

IPC分类号： G01R33/44

CPC分类号： G01R33/385 ,  G01R33/3806

摘要： When the gradient magnetic field 9 is generated, a low magnetic field region 22 and a high magnetic field region 21 are generated where a magnetic field crossing at least one of the first forward coil 11a, a second forward coil 11b, first revere coil 11e, and a second reverse coil 11d has different intensities between the low and high magnetic field regions and the intensity in the high magnetic region is higher than the intensity in the low magnetic field region. A line width Dlh of the coil line in the high magnetic field region 21 is narrower than the line width Dll of the coil line 24 in the low magnetic field region 22. There is provided a gradient magnetic field coil can suppress in a usable range heat generations due to eddy current and due to a pulse large current which steeply varies.

摘要翻译： 当产生梯度磁场9时，产生低磁场区域22和高磁场区域21，其中与第一正向线圈11a，第二正向线圈11b，第一重心线圈11e， 并且第二反向线圈11d在低磁场区域和高磁场区域之间具有不同的强度，并且高磁区域中的强度高于低磁场区域中的强度。 高磁场区域21中的线圈线的线宽度Dlh比低磁场区域22的线圈线24的线宽度Dll窄。设置有梯度磁场线圈可以在可用范围内抑制热量 由于涡电流和由于脉冲大电流而急剧变化。

公开(公告)号：US20130335088A1

公开(公告)日：2013-12-19

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

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：US09075119B2

公开(公告)日：2015-07-07

申请号：US13391066

申请日：2010-08-26

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

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

IPC分类号： G01R33/385 ,  G01R33/421

CPC分类号： G01R33/385 ,  G01R33/4215

摘要： In the magnetic resonance imaging device, the distance between the first and second coils is different in the circumferential direction and has a first region (A1) (θ=0, π) and a second region (A2) (θ=π/2) narrower than the first region (A1). In the first coil, wiring patterns (17a, 17b) on the side of a zero-plane (F0) passing through the center of the first coil and perpendicular to the axis direction (z-axis direction) meander in the circumferential direction such that the wiring patterns (17a, 17b) depart from the zero-plane (F0) in the first region (A1) and approach the zero-plane (F0) in the second region (A2). This provides a gradient magnetic field coil capable of configuring wiring patterns without using a loop coil that does not pass through the z-axis.

摘要翻译： 在磁共振成像装置中，第一和第二线圈之间的距离在圆周方向上不同，并且具有第一区域（A1）（＆eta; = 0，＆amp; pgr）和第二区域（A2）（＆Thetas; =＆pgr ; / 2）比第一区域（A1）窄。 在第一线圈中，通过第一线圈的中心并且垂直于轴线方向（z轴方向）的零平面（F0）侧的布线图案（17a，17b）在圆周方向上弯曲，使得 布线图案（17a，17b）从第一区域（A1）中的零平面（F0）偏离并接近第二区域（A2）中的零平面（F0）。 这提供了能够配置布线图案而不使用不通过z轴的环形线圈的梯度磁场线圈。

公开(公告)号：US08587313B2

公开(公告)日：2013-11-19

申请号：US12866327

申请日：2009-01-29

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

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

IPC分类号： G01V3/00

CPC分类号： G01R33/385 ,  G01R33/3806

摘要： When the gradient magnetic field 9 is generated, a low magnetic field region 22 and a high magnetic field region 21 are generated where a magnetic field crossing at least one of the first forward coil 11a, a second forward coil 11b, first revere coil 11e, and a second reverse coil 11d has different intensities between the low and high magnetic field regions and the intensity in the high magnetic region is higher than the intensity in the low magnetic field region. A line width Dlh of the coil line in the high magnetic field region 21 is narrower than the line width Dll of the coil line 24 in the low magnetic field region 22. There is provided a gradient magnetic field coil can suppress in a usable range heat generations due to eddy current and due to a pulse large current which steeply varies.

摘要翻译： 当产生梯度磁场9时，产生低磁场区域22和高磁场区域21，其中与第一正向线圈11a，第二正向线圈11b，第一重心线圈11e， 并且第二反向线圈11d在低磁场区域和高磁场区域之间具有不同的强度，并且高磁区域中的强度高于低磁场区域中的强度。 高磁场区域21中的线圈线的线宽度Dlh比低磁场区域22的线圈线24的线宽度Dll窄。设置有梯度磁场线圈可以在可用范围内抑制热量 由于涡电流和由于脉冲大电流而急剧变化。

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：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.