公开(公告)号：US08698499B2

公开(公告)日：2014-04-15

申请号：US12516077

申请日：2007-09-19

申请人： Mitsushi Abe ,  Hiroyuki Watanabe ,  Hirotaka Takeshima

发明人： Mitsushi Abe ,  Hiroyuki Watanabe ,  Hirotaka Takeshima

IPC分类号： G01R33/381 ,  G01R33/3815

CPC分类号： G01R33/3806 ,  G01R33/3815 ,  H01F7/202

摘要： An electromagnet device which generates magnetic field in the direction perpendicular to the inserting direction of an inspection subject is reduced in size and weight by removing unnecessary arrangement as much as possible. A magnetic resonance imaging device is also provided. The electromagnet device comprises a first coil (31) through which a first circular current (J1) circulates forward, a second coil (32) through which a second circular current (J2) circulates reversely, and a coil group (30) through which a plurality of circular currents (J3-J6) circulate alternately forward and reversely. The first coil (30), the second coil (32) and the coil group (30) are arranged in this order to increase the angle of elevation θ (θ1

摘要翻译： 通过尽可能地去除不必要的布置，在与检查对象的插入方向垂直的方向上产生磁场的电磁装置的尺寸和重量减小。 还提供了一种磁共振成像装置。 电磁体装置包括第一线圈（31），第一圆形电流（J1）向前循环;第二线圈（32），第二圆形电流（J2）通过该线圈反向循环;线圈组（30） 多个圆形电流（J3-J6）交替地向前和向后循环。 第一线圈（30），第二线圈（32）和线圈组（30）以此顺序排列以增加仰角; （＆Thetas; 1 <＆thetas; 2 <＆thetas; 3）和不包括第二线圈（32）和线圈组（30）的空白区域（S）存在于仰角和角度之间的角度区域中; 2和 ＆thetas; 3。

公开(公告)号：US08581586B2

公开(公告)日：2013-11-12

申请号：US12933255

申请日：2009-03-27

申请人： Mitsushi Abe ,  Hirotaka Takeshima

发明人： Mitsushi Abe ,  Hirotaka Takeshima

IPC分类号： G01V3/00

CPC分类号： G01R33/385

摘要： A coil pattern calculation method includes calculating a current potential at each contact between finite surface elements forming each of the coil surfaces based on an initial value of an input current potential distribution, and, for each of the coil surfaces, repeatedly calculating the current potential alternately and, under each magnetic field condition, determining a current potential distribution that generates a magnetic field falling within the range of allowable error for each target magnetic field so that a surface current represented by the current potential will become close to a target magnetic field distribution set for each of the finite surface elements; and determining a coil pattern from the contour lines of the determined current potential distribution.

摘要翻译： 线圈图案计算方法包括基于输入电流分布的初始值来计算形成每个线圈表面的有限表面元件之间的每个接触处的电流电位，并且对于每个线圈表面，交替重复地计算电流电势 并且在每个磁场条件下，确定产生每个目标磁场的容许误差范围内的磁场的电流分布，使得由电流电位表示的表面电流将变得接近目标磁场分布集 对于每个有限表面元素; 以及从所确定的电流分布的轮廓线确定线圈图案。

公开(公告)号：US20110018540A1

公开(公告)日：2011-01-27

申请号：US12933255

申请日：2009-03-27

申请人： Mitsushi Abe ,  Hirotaka Takeshima

发明人： Mitsushi Abe ,  Hirotaka Takeshima

IPC分类号： G01R33/44

CPC分类号： G01R33/385

摘要： The present invention eliminate the limitation of coil pattern design, facilitates the fabrication, and improves the accuracy of magnetic field. A coil pattern calculation method is characterized by comprising the steps of: calculating a current potential at each contact between finite surface elements forming each of the coil surfaces based on an initial value of an input current potential distribution, and, for each of the coil surfaces, repeatedly calculating the current potential alternately and, under each magnetic field condition, determining a current potential distribution that generates a magnetic field falling within the range of allowable error for each target magnetic field so that a surface current represented by the current potential will become close to a target magnetic field distribution set for each of the finite surface elements; and determining a coil pattern from the contour lines of the determined current potential distribution.

摘要翻译： 本发明消除了线圈图案设计的限制，便于制造，并且提高了磁场的精度。 线圈图案计算方法的特征在于包括以下步骤：基于输入电流分布的初始值来计算形成每个线圈表面的有限表面元件之间的每个接触处的电流电势，并且对于每个线圈表面 ，交替地重复计算电流，并且在每个磁场条件下，确定产生每个目标磁场的容许误差范围内的磁场的电流分布，使得由当前电位表示的表面电流变得接近 到每个有限表面元件的目标磁场分布集合; 以及从所确定的电流分布的轮廓线确定线圈图案。

公开(公告)号：US06876198B2

公开(公告)日：2005-04-05

申请号：US10380115

申请日：2001-09-11

申请人： Shigeru Watanabe ,  Tetsuhiko Takahashi ,  Hirotaka Takeshima ,  Hiromichi Shimizu

发明人： Shigeru Watanabe ,  Tetsuhiko Takahashi ,  Hirotaka Takeshima ,  Hiromichi Shimizu

IPC分类号： A61B5/055 ,  G01R33/28 ,  G01R33/54 ,  G01R33/561 ,  G01V3/00

CPC分类号： G01R33/285 ,  A61B5/055 ,  G01R33/54 ,  G01R33/5611

摘要： A magnetic resonance imaging apparatus is provided with a sequencer for executing a rapid imaging sequence of up to 100 ms at a full scan, a parallel measurement system for executing a partial encoding measurement in which the number of phase encoding operations performed for the measurement is reduced, an image processing system for reconstructing images from the information obtained though parallel measurements and composing reconstructed images of a plurality of areas to make one image, a display system for displaying the obtained images at a rate of 50 frame/second or more, and an image renewal system for taking in coordinate information of the cross-section to be imaged from position and pointing devices at intervals of about 0.1 second, and renewing the cross-section to be imaged in real time. Thus, imaging on the cross-sections indicated by a device can be performed in real time with high spatial and high time resolution.

摘要翻译： 磁共振成像装置设置有用于在全扫描时执行高达100ms的快速成像序列的定序器，用于执行部分编码测量的并行测量系统，其中对测量执行的相位编码操作的数量减少 ，图像处理系统，用于根据通过并行测量获得的信息重构图像，并且构成多个区域的重建图像以形成一个图像;显示系统，用于以50帧/秒以上的速率显示所获得的图像;以及 图像更新系统，用于以约0.1秒的间隔获取要从位置和指点设备成像的横截面的坐标信息，并实时更新要成像的横截面。 因此，可以以高空间和高时间分辨率实时地执行由装置指示的横截面上的成像。

公开(公告)号：US06498488B2

公开(公告)日：2002-12-24

申请号：US09992356

申请日：2001-11-13

申请人： Hirotaka Takeshima ,  Yoshihide Wadayama

发明人： Hirotaka Takeshima ,  Yoshihide Wadayama

IPC分类号： G01V300

CPC分类号： G01R33/383 ,  G01R33/56518

摘要： A magnetic resonance imaging apparatus is provided with a pair of static magnetic field uniformity controlling members 30A and 30B which are disposed adjacent to respective pair of magnetic plates 25A and 25B and of which cross sections configured so as to further enhance static magnetic field uniformity in static magnetic field region 21 and a pair of flat plate shaped eddy current suppressing members 29A and 29B which are disposed adjacent to respective pair of gradient magnetic field coils 28A and 28B and shield influences of gradient magnetic field generated by the gradient magnetic field coils 28A and 28B on the static magnetic field uniformity controlling members 30A and 30B of pole pieces. The eddy current suppressing members 29A and 29B are easily manufactured from a flat plate member simply by cutting the same while following the shape of the gradient magnetic field coils 28A and 28B. Further, with the provision of the eddy current suppressing members 29A and 29B influences due to eddy current and residual magnetism induced by the gradient magnetic field coils 28A and 28B on the static magnetic field uniformity controlling members 30A and 30B are suppressed and uniformity in the uniform static magnetic field region is enhanced.

摘要翻译： 磁共振成像装置设置有一对静磁场均匀性控制部件30A和30B，这些静止磁场均匀性控制部件30A和30B设置在相应的一对磁性板25A和25B附近，并且其横截面被配置为进一步增强静态磁场均匀性 磁场区域21和与各对梯度磁场线圈28A，28B相邻配置的一对平板状的涡流抑制部件29A，29B以及由倾斜磁场线圈28A，28B产生的倾斜磁场的屏蔽影响 在极片的静磁场均匀性控制构件30A和30B上。 涡流抑制部件29A，29B容易由平板部件简单地通过沿着倾斜磁场线圈28A，28B的形状切割而制作。 此外，由于涡电流抑制部件29A和29B由涡流引起的影响，由静磁场均匀性控制部件30A和30B上的梯度磁场线圈28A和28B引起的剩余磁体被抑制，均匀的均匀性 静磁场区域增强。

公开(公告)号：US5939962A

公开(公告)日：1999-08-17

申请号：US906001

申请日：1997-08-04

申请人： Yasuyuki Tahara ,  Hajime Tanabe ,  Hirotaka Takeshima

发明人： Yasuyuki Tahara ,  Hajime Tanabe ,  Hirotaka Takeshima

IPC分类号： G01R33/38 ,  G01R33/381 ,  H01F5/08

CPC分类号： G01R33/381 ,  G01R33/3806

摘要： Annular portions are arranged on mutually confronting surfaces at circumferential edge portions of low-temperature containers, the annular portions forming annular containing portions whose cross section is rectangular. Not only a side coil among a group of coils forming a collective coil body is disposed inside the containing portion, but also a gradient magnetic field unit, a radio-frequency transmission coil, and a reception coil are disposed inside a recessed portion so as to be integrated with one another into a single body, the recessed portion being formed so as to be surrounded by the corresponding annular portion. The side coil supplies more than half a designed magnetomotive force. Since a distance J of the mutually confronting low-temperature containers, i.e., the distance between the mutually confronting surfaces of the side coils can be reduced by a distance corresponding to the projection of the projected portions, not only the designed magnetomotive force can be reduced, but also the apparatus can be downsized and inexpensive.

摘要翻译： 环状部分布置在低温容器的圆周边缘部分的相互面对的表面上，环形部分形成截面为矩形的环形容纳部分。 形成集体线圈体的一组线圈中的侧线圈不仅设置在容纳部内，而且还设置有倾斜磁场单元，射频发送线圈和接收线圈， 彼此一体地形成为一体，该凹部被形成为被相应的环形部分包围。 侧线圈提供超过一半设计的磁动力。 由于相互面对的低温容器的距离J，即侧面线圈的相互面对的面之间的距离可以减小与突出部分的突起相对应的距离，不仅可以减小设计的磁动势 ，而且该装置也可以小型化和便宜化。

公开(公告)号：US20110037469A1

公开(公告)日：2011-02-17

申请号：US12516077

申请日：2007-09-19

申请人： Mitsushi Abe ,  Hiroyuki Watanabe ,  Hirotaka Takeshima

发明人： Mitsushi Abe ,  Hiroyuki Watanabe ,  Hirotaka Takeshima

IPC分类号： G01R33/34

CPC分类号： G01R33/3806 ,  G01R33/3815 ,  H01F7/202

摘要： An electromagnet device which generates magnetic field in the direction perpendicular to the inserting direction of an inspection subject is reduced in size and weight by removing unnecessary arrangement as much as possible. A magnetic resonance imaging device is also provided. The electromagnet device comprises a first coil (31) through which a first circular current (J1) circulates forward, a second coil (32) through which a second circular current (J2) circulates reversely, and a coil group (30) through which a plurality of circular currents (J3-J6) circulate alternately forward and reversely. The first coil (30), the second coil (32) and the coil group (30) are arranged in this order to increase the angle of elevation θ (θ1

摘要翻译： 通过尽可能地去除不必要的布置，在与检查对象的插入方向垂直的方向上产生磁场的电磁装置的尺寸和重量减小。 还提供了一种磁共振成像装置。 电磁体装置包括第一线圈（31），第一圆形电流（J1）向前循环;第二线圈（32），第二圆形电流（J2）通过该线圈反向循环;线圈组（30） 多个圆形电流（J3-J6）交替地向前和向后循环。 第一线圈（30），第二线圈（32）和线圈组（30）以此顺序排列以增加仰角; （＆Thetas; 1 <＆thetas; 2 <＆thetas; 3）和不包括第二线圈（32）和线圈组（30）的空白区域（S）存在于仰角和角度之间的角度区域中; 2和 ＆thetas; 3。

公开(公告)号：US07250766B2

公开(公告)日：2007-07-31

申请号：US11444309

申请日：2006-06-01

申请人： Hiroshi Morita ,  Ryozo Takeuchi ,  Akira Kurome ,  Takeshi Yatsuo ,  Hirotaka Takeshima

发明人： Hiroshi Morita ,  Ryozo Takeuchi ,  Akira Kurome ,  Takeshi Yatsuo ,  Hirotaka Takeshima

IPC分类号： G01V3/00

CPC分类号： G01R33/3856

摘要： A gradient coil apparatus for magnetic resonance imaging system includes a plurality of gradient coils 11a, 11b and 11c for applying a gradient magnetic field to a test object and an internal heat exchanger 14 to be immersed in insulation oil 13 in a container 12. A pump 16 is disposed to circulate coolant between the internal heat exchanger 14 and an external heat exchanger 15 is disposed outside of the container 12. This arrangement allows the insulation oil only inside of the container, thereby ensuring a substantial reduction in the amount of insulation oil.

摘要翻译： 用于磁共振成像系统的梯度线圈装置包括用于向测试对象施加梯度磁场的多个梯度线圈11a，11b和11c以及要浸入容器12中的绝缘油13中的内部热交换器14 。 泵16设置成在内部热交换器14之间循环冷却剂，外部热交换器15设置在容器12的外部。 这种布置允许绝缘油仅在容器内部，从而确保绝缘油的量显着减少。

公开(公告)号：US06909348B2

公开(公告)日：2005-06-21

申请号：US10433428

申请日：2001-12-04

申请人： Shigeru Kakugawa ,  Katsunori Azuma ,  Tsuyoshi Wakuda ,  Yoshihide Wadayama ,  Hirotaka Takeshima ,  Kenji Sakakibara ,  Takeshi Yatsuo ,  Takao Honmei

发明人： Shigeru Kakugawa ,  Katsunori Azuma ,  Tsuyoshi Wakuda ,  Yoshihide Wadayama ,  Hirotaka Takeshima ,  Kenji Sakakibara ,  Takeshi Yatsuo ,  Takao Honmei

IPC分类号： G01R33/38 ,  G01R33/3815 ,  G01R33/421 ,  H01F7/00

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

摘要： A magnet device provided with a shield current carrying means in which two sets of magneto-static field generating sources for generating magnetic fields directed towards a first direction are disposed facing each other across a finite region and at least one set of the magneto-static field generating sources are disclosed on at least two almost concentric circles. A first plane includes a first axis, a second axis and a first point. The first point is a point of insertion between the first axis parallel to the first direction and passing almost through the center of the shield current carrying means. The second axis crosses at right angles to the first axis and is spaced almost equal distance from the two sets of the generating sources. The alternately arranged positive and negative current carrying directions of the shield current carrying means are set in the order of increasing value of θn.

摘要翻译： 一种具有屏蔽电流承载装置的磁体装置，其中用于产生朝向第一方向的磁场的两组磁静电场产生源跨越有限区域并且至少一组磁静态场 在至少两个几乎同心圆上公开发生源。 第一平面包括第一轴，第二轴和第一点。 第一点是在第一轴平行于第一方向并且几乎穿过屏蔽载流装置的中心之间的插入点。 第二轴线与第一轴线成直角交叉，与两组发电源的距离几乎相等。 屏蔽电流承载装置的交替布置的正和负电流承载方向被设置为以该数量增加的顺序。

公开(公告)号：US06856223B1

公开(公告)日：2005-02-15

申请号：US10070998

申请日：2000-09-13

申请人： Hirotaka Takeshima ,  Takao Honmei ,  Hiroshi Tazaki ,  Kazuki Moritsu ,  Shigenori Kuroda ,  Hajime Tanabe

发明人： Hirotaka Takeshima ,  Takao Honmei ,  Hiroshi Tazaki ,  Kazuki Moritsu ,  Shigenori Kuroda ,  Hajime Tanabe

IPC分类号： A61B5/055 ,  G01R33/38 ,  G01R33/3815 ,  G01R33/3873 ,  G01R33/3875 ,  H01F6/00 ,  G01V3/00

CPC分类号： G01R33/3873 ,  G01R33/3806

摘要： An open-type magnet device for MRI includes a pair of upper and lower magnet assemblies, and shims are provided on opposite sides of their cooling containers and/or in holes passing through central portions of the cooling containers so as to facilitate providing a highly homogeneous static magnetic field.

摘要翻译： 用于MRI的开放型磁铁装置包括一对上下磁体组件，并且垫片设置在其冷却容器的相对侧和/或穿过冷却容器的中心部分的孔中，以便于提供高度均匀的 静磁场。