公开(公告)号：US07535226B2

公开(公告)日：2009-05-19

申请号：US11666599

申请日：2005-10-27

申请人： Tetsuhiko Takahashi ,  Tomohiro Goto

发明人： Tetsuhiko Takahashi ,  Tomohiro Goto

IPC分类号： G01V3/00

CPC分类号： G01R33/56375 ,  A61B5/055 ,  A61B5/7285 ,  G01R33/4833 ,  G01R33/5635 ,  G01R33/56383 ,  G01R33/5673 ,  G01R33/5676

摘要： There is provided an MRI apparatus that is capable of imaging ON/OFF in response to a biological gating signal and changing conditions for imaging, even while the moving bed imaging is performed, and further reducing a load on a subject to be examined, which is caused by fluctuations in the bed moving velocity. A controller that controls a bed to transport the examined subject in a static magnetic field and a unit to apply an RF magnetic field and a gradient magnetic field for imaging configures settings so that the bed moving velocity is kept constant considering an entire imaging time, and further controls the magnetic applying unit for applying the RF magnetic field and the gradient magnetic field so that a moving velocity of the FOV (imaging area) in the subject coordinate system is made different from the bed moving velocity.

摘要翻译： 提供了一种MRI装置，其能够响应于生物门控信号和变化的成像条件来对ON / OFF进行成像，即使在执行移动床成像的同时，进一步降低被检查对象的负荷，即 由床移动速度波动引起的。 一个控制器，其控制床以静态磁场传送被检查的被摄体，并且单元用于施加用于成像的RF磁场和梯度磁场，构成设置，使得考虑到整个成像时间，床移动速度保持不变，以及 进一步控制用于施加RF磁场和梯度磁场的磁性施加单元，使得对象坐标系中的FOV（成像区域）的移动速度与床移动速度不同。

公开(公告)号：US20080298799A1

公开(公告)日：2008-12-04

申请号：US12034993

申请日：2008-02-21

申请人： Masatoshi Takihiro ,  Takahiro Yoshida ,  Tetsuhiko Takahashi ,  Yu Mitsui ,  Ryuji Ishii

发明人： Masatoshi Takihiro ,  Takahiro Yoshida ,  Tetsuhiko Takahashi ,  Yu Mitsui ,  Ryuji Ishii

IPC分类号： G02F1/00

CPC分类号： H04Q11/0067 ,  H04L12/2861 ,  H04L12/287 ,  H04M7/123 ,  H04Q2011/0088 ,  H04Q2213/1301

摘要： In a broadband access network, calls can be kept active even when a telephone network fails. A voice gateway function captures callee telephone number information sent from a caller subscriber telephone to the telephone network and, when the telephone network fails, keeps the call active by retaining the connection between the caller and the callee. Furthermore, when the telephone network fails, the operation mode of the voice gateway and all ONTs is switched from an H.248 gateway mode to an SIP softswitch mode, allowing the voice gateway function to relay communication packets between ONTs and new call connections to be made in the broadband access network.

摘要翻译： 在宽带接入网络中，即使电话网络发生故障，也可以保持呼叫。 语音网关功能捕获从主叫用户电话发送到电话网络的被叫方电话号码信息，并且当电话网络发生故障时，通过保持主叫方和被叫方之间的连接来保持呼叫的活跃状态。 此外，当电话网络发生故障时，语音网关和所有ONT的操作模式从H.248网关模式切换到SIP软交换模式，允许语音网关功能将ONT和新呼叫连接之间的通信分组中继为 在宽带接入网中制造。

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：US5510714A

公开(公告)日：1996-04-23

申请号：US926517

申请日：1992-08-10

申请人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

发明人： Tetsuhiko Takahashi ,  Etsuji Yamamoto ,  Yoshiki Murakami ,  Yoshikuni Matsunaga

IPC分类号： G01R33/34 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/34046 ,  G01R33/3642 ,  G01R33/3657 ,  G01R33/3678

摘要： In a bird cage resonator, the axial length of rungs is changed between orthogonal elements. By doing this, the real view fields of orthogonal ports A and B in the sagittal direction are changed and the sensitivity difference between both view fields is reduced. For an object with an elliptical section to be inspected such as the human body, a remarkable difference in detection sensitivity between each orthogonal ports is eliminated and the receiving sensitivity of MRI apparatus employing the QD method is improved.

摘要翻译： 在鸟笼式谐振器中，梯级的轴向长度在正交元件之间变化。 通过这样做，矢状方向上的正交端口A和B的真实视场被改变，并且两个视场之间的灵敏度差减小。 对于具有诸如人体等待检查的椭圆形截面的物体，消除了每个正交端口之间的检测灵敏度的显着差异，并且提高了采用QD方法的MRI装置的接收灵敏度。

公开(公告)号：US5477145A

公开(公告)日：1995-12-19

申请号：US177393

申请日：1994-01-05

申请人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto

发明人： Tetsuhiko Takahashi ,  Yoshikuni Matsunaga ,  Etsuji Yamamoto

IPC分类号： A61B5/055 ,  G01R33/32 ,  G01R33/34 ,  G01R33/36 ,  G01V3/00

CPC分类号： G01R33/3642 ,  G01R33/34046 ,  G01R33/3657

摘要： In an RF probe comprising a resonator and a pickup coil, the pickup coil is an 8-shaped coil, and a center portion of this pickup coil is constituted in such a manner that crossing coils become parallel to each other at the portion. The center portion where the coils of the pickup coil are parallel to each other is so disposed as to extend along, and in the vicinity of, a part of a conductor loop of the resonator.

摘要翻译： 在包括谐振器和拾取线圈的RF探针中，拾取线圈是8形线圈，并且该拾取线圈的中心部分以这样的方式构成，使得交叉线圈在该部分处彼此平行。 拾波器线圈的线圈彼此平行的中心部分被布置成沿着谐振器的导体环的一部分延伸并且在谐振器的导体环的一部分附近。

公开(公告)号：US4954706A

公开(公告)日：1990-09-04

申请号：US330495

申请日：1989-03-30

申请人： Tetsuhiko Takahashi ,  Kenichi Okajima ,  Hiroshi Takeuchi

发明人： Tetsuhiko Takahashi ,  Kenichi Okajima ,  Hiroshi Takeuchi

IPC分类号： G01T1/00 ,  G01T1/20 ,  G01T1/29 ,  G21K4/00 ,  H01L27/14 ,  H01L27/146 ,  H01L31/09 ,  H04N5/32 ,  H05G1/64

CPC分类号： G01T1/2018 ,  G01T1/246 ,  G21K4/00 ,  H01L27/14676 ,  H05G1/64 ,  H01L27/14663

摘要： A radiographic image pickup apparatus for diagnosis using an image detector in which a phosphor layer for converting an X-ray image into an optical image, a photoconductive layer for storing an optical image as a latent image, light-emitting means for exciting the photoconductive layer segment by segment are laminated into a plate form, wherein one of the electrodes sandwiching the photoconductive layer and the light-emitting means are respectively divided into array-formed elements in directions orthogonal to each other, and an element selection circuit for successively selecting these elements and reading out said latent image in time sequential electric signal is formed integrally on the substrate of the image detector.

摘要翻译： 一种用于使用图像检测器进行诊断的放射线照相图像拾取装置，其中将用于将X射线图像转换成光学图像的荧光体层，用于存储光学图像作为潜像的光电导层，用于激发光电导层的发光装置 分段地层叠成板状，其中将光电导层和发光装置夹持的电极中的一个在彼此正交的方向上分别划分成阵列形成的元件，以及用于连续选择这些元件的元件选择电路 并且在时间序列电信号中读出所述潜像一体地形成在图像检测器的基板上。

公开(公告)号：US09726744B2

公开(公告)日：2017-08-08

申请号：US14241515

申请日：2012-07-27

申请人： Yukio Kaneko ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hideta Habara ,  Yosuke Otake

发明人： Yukio Kaneko ,  Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hideta Habara ,  Yosuke Otake

IPC分类号： G01R33/565 ,  G01R33/24 ,  A61B5/055 ,  G01R33/483 ,  G01R33/561

CPC分类号： G01R33/5659 ,  A61B5/055 ,  G01R33/246 ,  G01R33/4835 ,  G01R33/5612

摘要： Systems and methods for magnetic resonance imaging, including adjusting spatial distribution of a rotating magnetic field. By minimizing imaging time, the B1 nonuniformity reducing effect of RF shimming is maximized for an imaging section of an arbitrary axis direction and an arbitrary position. B1 distributions are measured for only several sections of one predetermined direction, and a radio frequency magnetic field condition that maximizes the B1 non-uniformity reducing effect for an imaging section of an arbitrary direction and an arbitrary position is calculated from the B1 distribution data.

公开(公告)号：US09638771B2

公开(公告)日：2017-05-02

申请号：US13811979

申请日：2011-07-25

申请人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hisaaki Ochi ,  Hideta Habara

发明人： Yoshihisa Soutome ,  Yoshitaka Bito ,  Hiroyuki Takeuchi ,  Tetsuhiko Takahashi ,  Hisaaki Ochi ,  Hideta Habara

IPC分类号： G01R33/34 ,  A61B5/055 ,  G01R33/345 ,  G01R33/36 ,  G01R33/422

CPC分类号： G01R33/34 ,  A61B5/055 ,  G01R33/34046 ,  G01R33/34084 ,  G01R33/3453 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/3678 ,  G01R33/422

摘要： A technique is provided to reserve large examination space in the tunnel type MRI apparatus, without increasing production cost nor reducing significantly irradiation efficiency and homogeneity in an irradiation distribution within an imaging region. The present invention provides an RF coil unit in which four partial cylindrical coils are placed with a gap therebetween in the circumferential direction inside a cylindrical RF shield, in such a manner that two pairs of the partial cylindrical coils are opposed to each other, and magnetic fields produced by the individual partial cylindrical coils are combined, thereby producing a circularly polarized wave field or an elliptically polarized wave field. The partial cylindrical coil is provided with a partial cylindrical conductor, multiple first conductors substantially parallel with the central axis of the RF shield, multiple capacitors connecting both ends of the first conductors with the partial cylindrical conductor, and a second conductor adjacent to at least one of the ends of the first conductor. The partial cylindrical coils are respectively provided with high frequency signals having a desired amplitude ratio and phase difference, while a reference frequency thereof being identical.

公开(公告)号：US09198599B2

公开(公告)日：2015-12-01

申请号：US13642573

申请日：2011-04-20

申请人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

发明人： Yo Taniguchi ,  Yoshitaka Bito ,  Tetsuhiko Takahashi ,  Takenori Murase

IPC分类号： A61B5/055 ,  G01R33/56 ,  G01R33/561 ,  A61B5/00 ,  G06T5/00

CPC分类号： A61B5/055 ,  A61B5/0042 ,  A61B2576/026 ,  G01R33/5608 ,  G01R33/5613 ,  G06T5/009 ,  G06T2207/10088

摘要： Image processing techniques which enable various contrast control, by quantitatively handling a degree of phase enhancement in a contrast control as a post-processing of the image reconstruction. A complex operation is performed on each pixel value of a complex image obtained by an MRI, thereby generating an image with desired contrast. Intensity is controlled by increasing or decreasing the argument of the pixel value of each pixel by a constant amount, and the degree of phase enhancement is controlled by multiplying the phase (argument) of each pixel by a constant.

摘要翻译： 通过定量处理对比度控制中的相位增强程度作为图像重构的后处理，可以实现各种对比度控制的图像处理技术。 对通过MRI获得的复合图像的每个像素值执行复杂操作，从而生成具有期望对比度的图像。 通过将每个像素的像素值的自变量增加或减小恒定量来控制强度，并且通过将每个像素的相位（自变量）乘以常数来控制相位增强的程度。

公开(公告)号：US08648597B2

公开(公告)日：2014-02-11

申请号：US12702666

申请日：2010-02-09

申请人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

发明人： Hideta Habara ,  Yoshitaka Bito ,  Hisaaki Ochi ,  Yoshihisa Soutome ,  Masayoshi Dohata ,  Tetsuhiko Takahashi ,  Hiroyuki Takeuchi

IPC分类号： G01R33/34

CPC分类号： G01R33/3456

摘要： An RF coil is provided with a hollow-shaped outer conductive element and strip-shaped conductive elements disposed along the outer conductive element in the axial direction. The strip-shaped conductive elements are disposed with uneven intervals to secure an internal space at a position where the strip-shaped conductive elements are not disposed. In order to obtain uniform sensitivity at the center section of the RF coil, the strip-shaped conductive elements and the outer conductive element are electrically connected via capacitors of which capacitances are adjusted so that a magnetic field component perpendicular to the center axis should be generated at a desired resonance frequency, and the strip-shaped conductive elements are axisymmetrically disposed with respect to the center axis of the outer conductive element. As a result, a comfortable examination space in a tunnel type MRI apparatus is achieved without increasing the manufacturing cost of the MRI apparatus.

摘要翻译： RF线圈设置有中空形的外导电元件和沿轴向方向沿着外导电元件设置的条形导电元件。 带状导电元件以不均匀的间隔设置，以将内部空间固定在未设置条形导电元件的位置。 为了在RF线圈的中心部分获得均匀的灵敏度，条状导电元件和外部导电元件通过电容被调节的电容器电连接，使得应当产生垂直于中心轴的磁场分量 并且所述带状导电元件相对于外导电元件的中心轴线对称设置。 结果，在不增加MRI装置的制造成本的情况下实现隧道式MRI装置中的舒适的检查空间。