公开(公告)号：US5327898A

公开(公告)日：1994-07-12

申请号：US908176

申请日：1992-07-02

Applicant: Hitoshi Yoshino ,  Hiroyuki Takeuchi

Inventor： Hitoshi Yoshino ,  Hiroyuki Takeuchi

IPC: G01R33/341 ,  A61B5/055 ,  G01R33/20

CPC classification number: G01R33/3678

Abstract: A signal receiving coil device for an MRI apparatus, to be fitted to a patient for detecting nuclear magnetic resonance signals, comprising a coil member assuming a substantially cylindrical shape when fitted to the patient and having at least one flexible section and at least one rigid section disposed sequentially and alternately in a circumferential direction of said cylindrical shape; a first coil unit disposed on the coil holding member, and having a signal receiving direction thereof crossing substantially orthogonally the direction of a static magnetic field generated by the MRI apparatus when the coil holding member is fitted to the patient; and a second coil system disposed on the coil holding member, and having a signal receiving direction of reception thereof crossing substantially orthogonally both of the direction of the static magnetic field and the signal receiving direction of the first coil unit when the coil holding member is fitted to the patient.

Abstract translation: 一种用于MRI装置的用于检测核磁共振信号的用于MRI装置的信号接收线圈装置，包括当装配到患者时呈现基本上圆柱形的线圈构件，并且具有至少一个柔性部分和至少一个刚性部分 沿所述圆柱形的圆周方向顺序地和交替地设置; 第一线圈单元，其设置在所述线圈保持构件上，并且当所述线圈保持构件安装到所述患者时，具有与所述MRI装置产生的静磁场的方向基本正交的信号接收方向; 以及第二线圈系统，其设置在所述线圈保持构件上，并且当所述线圈保持构件配合时，具有接收方向的信号接收方向与所述静磁场的方向和所述第一线圈单元的信号接收方向基本正交地交叉 给病人

公开(公告)号：US5293519A

公开(公告)日：1994-03-08

申请号：US669960

申请日：1991-03-15

Applicant: Hitoshi Yoshino ,  Hiroyuki Takeuchi

Inventor： Hitoshi Yoshino ,  Hiroyuki Takeuchi

IPC: G01R33/34 ,  G01R33/341 ,  G01R33/20

CPC classification number: G01R33/3678 ,  G01R33/34053 ,  G01R33/34069 ,  G01R33/365

Abstract: RF coils for a nuclear magnetic resonance device having following features separated or combined at an intersecting portion of two conductive loops disposed so that sensitive directions thereof are substantially perpendicular to a direction of a static magnetic field and that the conductive loops intersect each other with a predetermined interval; (1) conductors of conductive loops are narrowed; (2) neighborhood of intersecting portion is grounded; and (3) a member having a small dielectric constant is put inside of an intersecting portion.

Abstract translation: 用于核磁共振装置的RF线圈，其具有在两个导电回路的交叉部分处分离或组合的以下特征，使得其敏感方向基本上垂直于静态磁场的方向，并且导电环路以预定的方向彼此相交 间隔; （1）导电环的导体变窄; （2）相交部分邻接接地; 和（3）具有小介电常数的部件放置在相交部分的内部。

公开(公告)号：US07034537B2

公开(公告)日：2006-04-25

申请号：US10471539

申请日：2002-03-14

Applicant: Munetaka Tsuda ,  Hitoshi Yoshino ,  Hiroyuki Takeuchi ,  Shouichi Miyawaki

Inventor： Munetaka Tsuda ,  Hitoshi Yoshino ,  Hiroyuki Takeuchi ,  Shouichi Miyawaki

IPC: G01V3/00

CPC classification number: G01R33/3873 ,  G01R33/3815 ,  G01R33/389 ,  G01R33/56509

Abstract: An MRI apparatus having an open structure includes a static magnetic field generating magnet including magnetic field generating sources arranged above and below an imaging space and magnetic field fluctuation reducing plates arranged inside the magnet. Gradient magnetic field coils are fixed to the static magnetic field generating magnet so as to not be in contact with the magnetic field fluctuation reducing plates. When the strength of the magnetic field generated by the static magnetic field generating magnet fluctuates due to vibration of the gradient magnetic field coils or other devices during an imaging operation of the MRI apparatus, an eddy current is generated on the magnetic field fluctuation reducing plates in response to the magnetic field fluctuation components. Magnetic flux which cancels the static magnetic field fluctuation components is generated due to this eddy current, and consequently, a time-sequentially stable static magnetic field can be obtained.

Abstract translation: 具有开放结构的MRI装置包括：静磁场产生磁体，包括设置在成像空间上下的磁场发生源和布置在磁体内部的磁场波动减小板。 梯度磁场线圈被固定到静磁场产生磁体上，以便不与磁场波动减小板接触。 当MRI装置的成像操作期间由静磁场产生磁体产生的磁场的强度由于梯度磁场线圈或其他装置的振动而变动时，在磁场变动减小板上产生涡电流 响应磁场波动分量。 由于该涡电流而产生抵消静磁场波动分量的磁通，因此可以获得时间依次稳定的静磁场。

公开(公告)号：US09684044B2

公开(公告)日：2017-06-20

申请号：US14349424

申请日：2012-10-17

Applicant: Hideta Habara ,  Yoshihisa Soutome ,  Hiroyuki Takeuchi ,  Hisaaki Ochi

Inventor： Hideta Habara ,  Yoshihisa Soutome ,  Hiroyuki Takeuchi ,  Hisaaki Ochi

IPC: G01R33/34 ,  G01R33/3415 ,  G01R33/345 ,  G01R33/36

CPC classification number: G01R33/34092 ,  G01R33/3415 ,  G01R33/3453 ,  G01R33/36 ,  G01R33/365

Abstract: 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.

公开(公告)号：US09453897B2

公开(公告)日：2016-09-27

申请号：US13817680

申请日：2011-08-18

Applicant: Shouichi Miyawaki ,  Hiroyuki Takeuchi

Inventor： Shouichi Miyawaki ,  Hiroyuki Takeuchi

IPC: G01R33/58 ,  G01R33/389 ,  G01R33/565 ,  A61B5/055

CPC classification number: G01R33/58 ,  A61B5/055 ,  G01R33/389 ,  G01R33/56509 ,  G01R33/56518

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130335088A1

公开(公告)日：2013-12-19

申请号：US13979542

申请日：2012-01-13

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

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

IPC: G01R33/385

CPC classification number: G01R33/385 ,  G01R33/4215

Abstract: 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.

Abstract translation: 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：US08602908B2

公开(公告)日：2013-12-10

申请号：US12762646

申请日：2010-04-19

Applicant: Hiroyuki Takeuchi

Inventor： Hiroyuki Takeuchi

IPC: A63B53/10

CPC classification number: A63B53/10 ,  A63B60/14 ,  A63B2209/023

Abstract: A shaft of the present invention has a tip reinforcing layer. A prepreg s9 for the tip reinforcing layer has a portion having a larger circumferential direction width Ws toward a tip side. The prepreg s9 for the tip reinforcing layer has a thickness Pt of 0.06 mm or greater and 0.12 mm or less. An edge Ds of the tip reinforcing layer extends in an axial direction of the shaft while circulating in a circumferential direction of the shaft. An average value Ha of the five heights h11 to h15 is equal to or less than 0.03 mm.

Abstract translation: 本发明的轴具有尖端加强层。 用于尖端加强层的预浸料坯s9具有朝向尖端侧具有较大圆周方向宽度Ws的部分。 尖端加强层的预浸料坯s9的厚度Pt为0.06mm以上且0.12mm以下。 尖端加强层的边缘Ds沿着轴的轴向延伸，同时在轴的圆周方向上循环。 五个高度h11至h15的平均值Ha等于或小于0.03mm。

公开(公告)号：US08587310B2

公开(公告)日：2013-11-19

申请号：US13054155

申请日：2009-07-22

Applicant: Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

Inventor： Yo Taniguchi ,  Yoshitaka Bito ,  Shoichi Miyawaki ,  Hiroyuki Takeuchi ,  Suguru Yokosawa

IPC: G01V3/00

CPC classification number: G01R33/56518 ,  A61B5/055 ,  A61B5/7257 ,  G01R33/5616 ,  G01R33/56341 ,  G01R33/56563

Abstract: In the diffusion-weighted imaging, amounts of distortion and amounts of phase offset of k-space data due to a temporally changing magnetic field error induced by eddy currents and vibrations associated with application of a diffusion-weighted gradient magnetic field pulse are corrected with good precision to improve image quality. Characteristic data for correcting distortion of k-space data are calculated for every position in the slice direction as peak shifts of projections observed between the cases of applying and not applying an MPG pulse. As the characteristic data, amounts of distortion in the read-out direction and the phase encoding direction and phase offset amounts in a slice plane are calculated.

Abstract translation: 在扩散加权成像中，由于由涡流引起的瞬时变化的磁场误差和与施加扩散加权梯度磁场脉冲相关的振动引起的k空间数据的失真量和相位偏移量被校正为良好 精度提高图像质量。 针对切片方向上的每个位置计算用于校正k空间数据的失真的特征数据，作为施加和不施加MPG脉冲的情况之间观察到的投影的峰值偏移。 作为特征数据，计算读取方向上的失真量和切片平面中的相位编码方向和相位偏移量。

公开(公告)号：US08203342B2

公开(公告)日：2012-06-19

申请号：US12519832

申请日：2007-12-13

Applicant: Hisaaki Ochi ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Takeshi Yatsuo ,  Hiroyuki Takeuchi

Inventor： Hisaaki Ochi ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Takeshi Yatsuo ,  Hiroyuki Takeuchi

IPC: G01V3/00

CPC classification number: G01R33/385 ,  G01R33/34076 ,  G01R33/4215 ,  G01R33/422 ,  G01R33/5659

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07898255B2

公开(公告)日：2011-03-01

申请号：US11813011

申请日：2006-02-06

Applicant: Hisaaki Ochi ,  Yo Taniguchi ,  Hiroyuki Takeuchi

Inventor： Hisaaki Ochi ,  Yo Taniguchi ,  Hiroyuki Takeuchi

IPC: G01V3/00

CPC classification number: G01R33/3415 ,  A61B5/055 ,  G01R33/34084 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/5611

Abstract: An MRI apparatus capable of selecting an optional direction as a phase encoding direction and achieving a preferable S/N, when an imaging time shortening technique is applied. A receiver coil, used as a receiver coil of a vertical magnetic field MRI apparatus, is a combination of a first coil (solenoid coil) forming a current loop around the outer circumference of a test object, second coils forming even-numbered current loops, and third coils forming odd-numbered current loops, in the direction intersecting the plane of the current loop of the first coil. The second coil and the third coil are arranged in such a manner that, as for the current loops in the array direction thereof, a position where a sensitivity of one coil is minimized approximately coincides with a position where the sensitivity of the other coil is maximized, whereby electromagnetic coupling is suppressed.

Abstract translation: 当应用成像时间缩短技术时，能够选择可选方向作为相位编码方向并获得优选的S / N的MRI装置。 用作垂直磁场MRI设备的接收器线圈的接收器线圈是形成围绕测试对象的外圆周的电流回路的第一线圈（螺线管线圈），形成偶数电流回路的第二线圈， 以及在与第一线圈的电流回路的平面相交的方向上形成奇数电流回路的第三线圈。 第二线圈和第三线圈以这样的方式布置，即对于其排列方向上的电流环，一个线圈的灵敏度最小化的位置近似与其他线圈的灵敏度最大化的位置一致 从而抑制电磁耦合。