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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。
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公开(公告)号：US07852083B2
公开(公告)日：2010-12-14
申请号：US12296719
申请日：2007-04-10
申请人： Takeshi Yatsuo , Hiroyuki Takeuchi , Akira Kurome
发明人： Takeshi Yatsuo , Hiroyuki Takeuchi , Akira Kurome
IPC分类号： G01V3/00
CPC分类号： G01R33/385 , G01R33/3856 , G01R33/3858 , G01R33/4215 , G01R33/422
摘要： An MRI apparatus excellent in magnetic field generation efficiency is provided. According to this invention, a main coil (52) of a gradient magnetic field coil (13) is partially recessed to reduce the total thickness of a radio-frequency coil (11) and a gradient magnetic field coil (13). That is, the main coil (52) is designed in a tubular shape, and the diameter r1 at the center portion of the imaging space is larger than the diameter r2 of the main coil end portion. Accordingly, the RF coil (11) can be disposed to be near to the gradient magnetic field coil (13) side without lowering the magnetic field generation efficiency.
摘要翻译： 提供了磁场产生效率优异的MRI装置。 根据本发明，梯度磁场线圈（13）的主线圈（52）部分地凹入，以减小射频线圈（11）和梯度磁场线圈（13）的总厚度。 也就是说，主线圈（52）被设计成管状，并且成像空间的中心部分处的直径r1大于主线圈端部的直径r2。 因此，RF线圈（11）可以靠近梯度磁场线圈（13）而不降低磁场产生效率。
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公开(公告)号：US20090066332A1
公开(公告)日：2009-03-12
申请号：US12296719
申请日：2007-04-10
申请人： Takeshi Yatsuo , Hiroyuki Takeuchi , Akira Kurome
发明人： Takeshi Yatsuo , Hiroyuki Takeuchi , Akira Kurome
IPC分类号： G01R33/385
CPC分类号： G01R33/385 , G01R33/3856 , G01R33/3858 , G01R33/4215 , G01R33/422
摘要： An MRI apparatus excellent in magnetic field generation efficiency is provided. According to this invention, a main coil (52) of a gradient magnetic field coil (13) is partially recessed to reduce the total thickness of a radio-frequency coil (11) and a gradient magnetic field coil (13). That is, the main coil (52) is designed in a tubular shape, and the diameter r1 at the center portion of the imaging space is larger than the diameter r2 of the main coil end portion. Accordingly, the RF coil (11) can be disposed to be near to the gradient magnetic field coil (13) side without lowering the magnetic field generation efficiency.
摘要翻译： 提供了磁场产生效率优异的MRI装置。 根据本发明，梯度磁场线圈（13）的主线圈（52）部分地凹入，以减小射频线圈（11）和梯度磁场线圈（13）的总厚度。 也就是说，主线圈（52）被设计成管状，并且成像空间的中心部分处的直径r1大于主线圈端部的直径r2。 因此，RF线圈（11）可以靠近梯度磁场线圈（13）而不降低磁场产生效率。
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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。
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公开(公告)号：US20130335088A1
公开(公告)日：2013-12-19
申请号：US13979542
申请日：2012-01-13
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。
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公开(公告)号：US09541617B2
公开(公告)日：2017-01-10
申请号：US13979542
申请日：2012-01-13
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。
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公开(公告)号：US08203342B2
公开(公告)日：2012-06-19
申请号：US12519832
申请日：2007-12-13
IPC分类号： G01V3/00
CPC分类号： G01R33/385 , G01R33/34076 , G01R33/4215 , G01R33/422 , G01R33/5659
摘要： A coil unit comprises a gradient coil which is disposed along a static magnetic field generating source, and a radio frequency coil which is disposed along the gradient coil in a test region at a position closer to the center of the test region compared with the gradient coil, and a conductor part which is disposed between the gradient coil and the radio frequency coil, and covers periphery of the radio frequency coil. The radio frequency coil comprises a first loop coil and a second loop coil locating in planes substantially perpendicular to direction of the static magnetic field, a plurality of linear conductors connecting the first loop coil and the second loop coil and substantially parallel to the direction of the static magnetic field, and a plurality of first capacitors disposed in the first loop coil and the second loop coil.
摘要翻译： 线圈单元包括沿着静磁场发生源设置的梯度线圈，以及与梯度线圈相比更靠近测试区域的中心的位置处的测试区域中的沿梯度线圈布置的射频线圈 以及布置在所述倾斜线圈和所述射频线圈之间并且覆盖所述射频线圈的周围的导体部。 射频线圈包括第一环形线圈和位于基本上垂直于静态磁场方向的平面中的第二环形线圈;多个线性导体，其连接第一环形线圈和第二环形线圈，并且基本上平行于 静磁场和设置在第一环形线圈和第二环形线圈中的多个第一电容器。
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公开(公告)号：US20110175616A1
公开(公告)日：2011-07-21
申请号：US12519832
申请日：2007-12-13
IPC分类号： G01R33/44
CPC分类号： G01R33/385 , G01R33/34076 , G01R33/4215 , G01R33/422 , G01R33/5659
摘要： There is provided a coil unit having a large region of homogeneous sensitivity for the axial direction even with a shortened rung length of birdcage type RF coil.The coil unit comprises a gradient coil which is disposed along a static magnetic field generating source, and a radio frequency coil which is disposed along the gradient coil in a test region at a position closer to the center of the test region compared with the gradient coil, and a conductor part which is disposed between the gradient coil and the radio frequency coil, and covers periphery of the radio frequency coil. The radio frequency coil comprises a first loop coil and a second loop coil locating in planes substantially perpendicular to direction of the static magnetic field, a plurality of linear conductors connecting the first loop coil and the second loop coil and substantially parallel to the direction of the static magnetic field, and a plurality of first capacitors disposed in the first loop coil and the second loop coil. The coil unit further comprises a first connecting part, which electrically connects the radio frequency coil and the conductor part via a second capacitor and comprises an electric power supply circuit disposed in parallel to the second capacitor, and a second connecting part which connects the radio frequency coil and the conductor part via a third capacitor.
摘要翻译： 提供了一种线圈单元，即使在鸟笼型RF线圈的长度较短的情况下也具有轴向均匀的灵敏度大的区域。 线圈单元包括沿着静磁场发生源设置的梯度线圈，以及与梯度线圈相比更靠近测试区域的中心的位置处的测试区域中的沿梯度线圈布置的射频线圈 以及布置在所述倾斜线圈和所述射频线圈之间并且覆盖所述射频线圈的周围的导体部。 射频线圈包括位于基本上垂直于静磁场方向的平面中的第一环形线圈和第二环形线圈，连接第一环形线圈和第二环形线圈并且基本上平行于静态磁场方向的多个线性导体 静磁场和设置在第一环形线圈和第二环形线圈中的多个第一电容器。 线圈单元还包括第一连接部分，其经由第二电容器电连接射频线圈和导体部分，并且包括与第二电容器并联设置的电源电路，以及连接射频 线圈和导体部分经由第三电容器。
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公开(公告)号：US09684044B2
公开(公告)日：2017-06-20
申请号：US14349424
申请日：2012-10-17
IPC分类号： G01R33/34 , G01R33/3415 , G01R33/345 , G01R33/36
CPC分类号： G01R33/34092 , G01R33/3415 , G01R33/3453 , G01R33/36 , G01R33/365
摘要： In order to provide a technique which can suppress coupling to homogenize the spatial distribution of an RF magnetic field and can improve penetration of the RF magnetic field into the subject, pad-like electric field conductors having a predetermined area are provided outside both ends of a rung conductor as a part of a configuration which forms a loop-like circuit and is driven as an antenna. An antenna device includes a sheet-like conductor, a rung conductor which is arranged at a predetermined distance from the sheet-like conductor, two electric field conductors which are arranged in both end portions of the rung conductor at a predetermined distance from the sheet-like conductor, and connection terminals which are transmission and reception terminals provided in the rung conductor and the sheet-like conductor. The rung conductor and the sheet-like conductor configure a loop circuit which resonates at a preset frequency.
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10.发明授权公开(公告)号：US09453897B2
公开(公告)日：2016-09-27
申请号：US13817680
申请日：2011-08-18
IPC分类号： G01R33/58 , G01R33/389 , G01R33/565 , A61B5/055
CPC分类号： G01R33/58 , A61B5/055 , G01R33/389 , G01R33/56509 , G01R33/56518
摘要： Regardless of the measurement conditions, the degradation of the image quality due to a vibrational error magnetic field, which is generated by the vibration of the mechanical structure of an MRI apparatus, is reduced. In order to do so, error magnetic field image data indicating an error magnetic field distribution is acquired on the basis of an echo signal measured using a pulse sequence having a test gradient magnetic field, a parameter value of a damped vibration function showing a vibrational error magnetic field is calculated using the error magnetic field image data, and a correction magnetic field is calculated on the basis of the calculated parameter value of the damped vibration function showing the vibrational error magnetic field.
摘要翻译： 不管测量条件如何，减少了由MRI装置的机械结构的振动产生的由振动误差磁场引起的图像质量的劣化。 为了这样做，基于使用具有测试梯度磁场的脉冲序列测量的回波信号，获得表示误差磁场分布的误差磁场图像数据，显示振动误差的阻尼振动函数的参数值 使用误差磁场图像数据计算磁场，并且基于计算出的表示振动误差磁场的阻尼振动函数的参数值来计算校正磁场。
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