Superconducting magnet device and magnetic resonance imaging system employing it
    51.
    发明申请
    Superconducting magnet device and magnetic resonance imaging system employing it 有权
    超导磁体装置和使用它的磁共振成像系统

    公开(公告)号:US20050248350A1

    公开(公告)日:2005-11-10

    申请号:US10528759

    申请日:2003-09-12

    CPC分类号: G01R33/3815

    摘要: In order to provide a high intensity magnetic field open type MRI apparatus which suppresses electro-magnetic interference to super-conducting coils due to gradient magnetic field coils and high frequency magnetic field coils and to realize stable operation of super-conducting magnet, in a static magnetic field generating magnet 102, a pair of cryostats 117 are connected by a coupling tube 201 and disposed in vertical direction while sandwiching a space 118 where a subject is laid, and in vessels 202 and 203 filled with liquid helium in the respective cryostats super-conducting coils are accommodated. To the cryostats 117 an emergency demagnetizing unit 120 for attenuating magnetic field and a measurement unit 121 for monitoring helium liquid level belong, and signal cables therefor are connected to an inner circuit of the static magnetic field generating magnet 102 via a filter circuit 122. High frequency current induced when the gradient magnetic field coils and the high frequency magnetic field coils are driven is interrupted by the filter circuit 122 and is caused to flow to a connection point 123 via the outer casing of the cryostats 117, thereby, no influences are effected to the inner circuit in the cryostats 117.

    摘要翻译: 为了提供一种高强度磁场开放型MRI装置,其抑制由于梯度磁场线圈和高频磁场线圈引起的对超导线圈的电磁干扰,并且实现超导磁体的稳定运行,在静态 磁场产生磁体102,一对低温恒温器117通过耦合管201连接并且在垂直方向上设置,同时夹着放置受试者的空间118,以及在各个低温恒温器中填充液氦的容器202和203中, 容纳导线。 对于低温恒温器117,用于衰减磁场的紧急退磁单元120和用于监测氦液位的测量单元121属于,并且其信号电缆经由滤波器电路122连接到静磁场产生磁体102的内部电路。高 当驱动梯度磁场线圈和高频磁场线圈时感应的频率电流被滤波器电路122中断,并且经由低温恒温器117的外壳流到连接点123,从而不影响其影响 到低温恒温器117中的内部电路。

    Magnetic resonance imaging device
    52.
    发明申请
    Magnetic resonance imaging device 有权
    磁共振成像装置

    公开(公告)号:US20050218894A1

    公开(公告)日:2005-10-06

    申请号:US10518122

    申请日:2003-07-03

    IPC分类号: G01R33/565 G01V3/00

    CPC分类号: G01R33/56518

    摘要: An MRI apparatus having a calibration pulse sequence, wherein a group of pulse sequences for applying test gradient magnetic fields are established from a basic pulse sequence by a gradient echo method of short TR, a group of pulse sequences not applying test gradient fields are established from the basic pulse sequence, a set of three- or four-dimensional data including a time variable is created by using echo signals collected by at least one of the groups, two data sets are created as a whole by inverting the polarity of the test gradient magnetic field, the difference between phase images thereof is determined, the magnitude and time constant of eddy current induced at the fall or rise of the gradient magnetic field are determined from the phase difference image, and the variation of the magnetic field due to eddy current induced at the rise and/or fall of the gradient magnetic field can be measured in a relatively short time with a desired time resolution even if the magnetic field variation is of a very long time constant.

    摘要翻译: 具有校准脉冲序列的MRI装置,其中通过短TR的梯度回波方法从基本脉冲序列建立用于施加测试梯度磁场的一组脉冲序列,建立不应用测试梯度场的一组脉冲序列 通过使用由至少一个组收集的回波信号来创建包括时间变量的三维或四维数据的基本脉冲序列的集合,通过反转测试梯度的极性来整体地创建两个数据集 磁场,确定其相位图像之间的差异,从相位差图像确定在倾斜磁场的下降或上升期间感应的涡流的大小和时间常数,以及由于涡流引起的磁场的变化 在梯度磁场的上升和/或下降时可以在相对短的时间内以期望的时间分辨率测量,即使磁场 d变化是非常长的时间常数。

    Tennis racket
    53.
    发明申请
    Tennis racket 失效
    网球拍

    公开(公告)号:US20050192128A1

    公开(公告)日:2005-09-01

    申请号:US10967296

    申请日:2004-10-19

    CPC分类号: A63B51/10 A63B49/022

    摘要: Supposing that an upper part of the ball-hitting face (F) is set as a 0-degree position, a string protection member (21) is mounted on at least one portion of a head part of the racket frame in a range from a clockwise 45-degree position to a clockwise 135-degree position and in a range from a clockwise 225-degree position to a clockwise 315-degree position by interposing a viscoelastic member between the string protection member and the racket frame. The moment (Is) of inertia of the tennis racket in a swing direction is set to not less than 450,000 g/cm2 nor more than 490,000 g/cm2, when strings are not tensionally mounted thereon. The moment (Ic) of inertia of the tennis racket in a center direction is set to not less than 15,000 g/cm2 nor more than 19,000 g/cm2, when the strings are not tensionally mounted thereon.

    摘要翻译: 假设将击球面(F)的上部设定为0度位置,则在球拍框架的头部的至少一部分上安装绳保护构件(21)的范围从 顺时针方向45度位置,顺时针方向135度位置,并在顺时针方向的225度位置到顺时针方向的315度位置,方法是将一个粘弹组件插入到球杆保护构件和球拍框架之间。 网球拍在摆动方向的惯性力矩(Is)设定为不小于45万g / cm 2以上,不大于490,000g / cm 2以下,当 弦没有紧固地安装在其上。 网球拍在中心方向的惯性矩(Ic)设定为15000g / cm 2以上19000g / cm 2以下,当 弦不会紧紧地安装在其上。

    Rotation position detecting device
    54.
    发明申请
    Rotation position detecting device 有权
    旋转位置检测装置

    公开(公告)号:US20050177338A1

    公开(公告)日:2005-08-11

    申请号:US10988515

    申请日:2004-11-16

    CPC分类号: G01D5/2457

    摘要: A rotation position detecting device includes an angular signal generator which generates pulses the cycle period of which is even or equal when a rotating object rotates at a constant rotation speed and a non-pulse portion which corresponds to a reference position, an up-down command circuit for generating an up-down command signal the frequency of which is divided to a half of the frequency of the angular signal, a pair of first counters for counting up or down the clock signal when the up-down command signal changes from a first level to a second level to reset and subsequently counting down the clock signal when the up-down command signal changes from the second level to the first level, a pair of processing circuits for providing a first and second reference values, a pair of counters which generates detection signals when the counted number of the counters becomes smaller than the first or the second reference value.

    摘要翻译: 旋转位置检测装置包括角度信号发生器,其产生当旋转物体以恒定旋转速度旋转的循环周期均匀或相等的脉冲和对应于基准位置的非脉冲部分的脉冲,上下指令 电路,用于产生其频率被分频为角度信号的频率的一半的上下指令信号;一对第一计数器,用于当上下命令信号从第一 当上升命令信号从第二电平变为第一电平时,复位并随后对时钟信号进行递减,一对用于提供第一和第二参考值的处理电路,一对计数器 当计数的计数数量小于第一或第二参考值时,产生检测信号。

    Difluoromethyl ether derivative and process for producing the same
    55.
    发明授权
    Difluoromethyl ether derivative and process for producing the same 有权
    二氟甲基醚衍生物及其制备方法

    公开(公告)号:US06605747B2

    公开(公告)日:2003-08-12

    申请号:US09925608

    申请日:2001-08-10

    IPC分类号: C07C4106

    摘要: The present invention provides a difluoromethyl ether derivative which shows various suitable physical properties as a liquid crystal compound, a liquid crystal composition comprising the compound and a liquid crystal display element containing the composition, and also provides a simple and efficient process for producing the difluoromethyl ether derivative. According to the present invention, a process for producing a difluoromethyl ether derivative represented by Formula (1d): wherein the variables are defined in the specification, is characterized by using an &agr;&agr;-difluorocyclohexylidene derivative represented by Formula (1a): wherein R1, rings A1 and A2, Z1, Z2, k and l have the same meanings as defined in the specification, as a starting material.

    摘要翻译: 本发明提供一种二氟甲基醚衍生物,其显示出作为液晶化合物的各种合适的物理性质,包含该化合物的液晶组合物和含有该组合物的液晶显示元件,并且还提供了制备二氟甲基醚的简单有效的方法 衍生物。 根据本发明,由式(1d)表示的二氟甲基醚衍生物的制造方法,其特征在于,使用由式(1a)表示的αα-二氟亚环己基衍生物:其中,R1, A1和A2,Z1,Z2,k和l具有与说明书中定义的相同的含义作为起始材料。

    Magnetic resonance imaging method and apparatus
    56.
    发明授权
    Magnetic resonance imaging method and apparatus 有权
    磁共振成像方法和装置

    公开(公告)号:US06600317B1

    公开(公告)日:2003-07-29

    申请号:US09869577

    申请日:2001-06-27

    IPC分类号: G01V300

    CPC分类号: G01R33/4835

    摘要: In processing of measurement data of each slab obtained by 3D-TOF multi-slab measurement, data in the overlapped portion of the slabs are weighted and added for each slice position. The weight function is calculated based on parameters set previously and is the same as the slab profile or an approximation curve thereof. The weighted and added data are normalized and reconstructed to obtain images. In the obtained image, signal difference between slabs can be suppressed.

    摘要翻译: 在通过3D-TOF多板测量获得的每个板的测量数据的处理中,对于每个切片位置对板的重叠部分中的数据进行加权和加法。 重量函数是根据先前设定的参数计算的,并且与平板轮廓或其近似曲线相同。 加权和添加的数据被归一化和重构以获得图像。 在获得的图像中,可以抑制板之间的信号差。

    Substituted benzene derivative, liquid crystal composition, and liquid crystal display element
    57.
    发明授权
    Substituted benzene derivative, liquid crystal composition, and liquid crystal display element 有权
    取代苯衍生物,液晶组合物和液晶显示元件

    公开(公告)号:US06579577B2

    公开(公告)日:2003-06-17

    申请号:US09917271

    申请日:2001-07-30

    IPC分类号: C09K1912

    摘要: There is provided a liquid crystalline compound having a high voltage holding ratio which has a very small degree of temperature dependence, a low threshold voltage which has a very small degree of temperature dependence, a high &Dgr;n, and excellent miscibility with other liquid crystal materials at low temperature; a liquid crystal composition; and a liquid crystal display element, and the liquid crystalline compound is a substituted benzene derivative represented by general formula (1), where, R represents a straight chain or branched alkyl group having 1 to 20 carbon atoms in which each of optional and nonadjacent methylene groups (—CH2—) may be substituted by an oxygen atom; X represents a halogen atom, —CF3, —CF2H, —CFH2, —OCF3 or —OCF2H; each of Z1 and Z2 independently represents —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2— or a covalent bond, but Z1 and Z2 are not covalent bonds simultaneously; each of Y1, Y2, Y3, Y4, Y5, and Y6 independently represents H or F, but at least one of Y1, Y2, Y3, and Y4 represents F.

    摘要翻译: 提供了具有非常小的温度依赖性的高电压保持率的液晶化合物,具有非常小的温度依赖性的低阈值电压,高DELTAn和与其它液晶材料的优异的混溶性 低温; 液晶组合物; 和液晶显示元件,液晶化合物是通式(1)表示的取代苯衍生物,其中,R表示碳原子数1〜20的直链或支链烷基,其中任选的和不相邻的亚甲基 基团(-CH 2 - )可以被氧原子取代; X表示卤素原子,-CF 3,-CF 2 H,-CFH 2,-OCF 3或-OCF 2 H; Z 1和Z 2各自独立地表示 - (CH 2)2 - , - (CH 2)4 - , - CH 2 O-,-OCH 2 - 或共价键,但Z 1和Z 2不同时为共价键; Y1,Y2,Y3,Y4,Y5和Y6各自独立地表示H或F,但Y1,Y2,Y3和Y4中的至少一个表示F.

    Complex electronic component
    59.
    发明授权
    Complex electronic component 有权
    复杂的电子元件

    公开(公告)号:US06462638B2

    公开(公告)日:2002-10-08

    申请号:US09884157

    申请日:2001-06-20

    IPC分类号: H01F500

    CPC分类号: H01F17/0013

    摘要: When a plurality of devices are disposed in parallel in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed between adjacent devices. When adjacent devices among a plurality of devices are disposed on different planes in a magnetic ceramic laminated member to form a complex electronic component, an insulating member is disposed at least at a part of an intermediate layer positioned between the adjacent devices in the lamination direction.

    摘要翻译: 当多个装置并联设置在磁性陶瓷层叠构件中以形成复杂的电子部件时,绝缘构件设置在相邻的装置之间。 当多个器件中的相邻器件设置在磁性陶瓷层叠部件的不同平面上以形成复杂的电子部件时,绝缘部件至少位于层叠方向上位于相邻器件之间的中间层的一部分。