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29 条记录 (耗时 0.028 秒)

    X-ray CT apparatus
    1.
    发明授权
    X-ray CT apparatus 有权
    X射线CT装置

    公开(公告)号：US06947516B2

    公开(公告)日：2005-09-20

    申请号：US10077819

    申请日：2002-02-20

    申请人： Miwa Okumura ,  Masahiko Yamazaki ,  Satoru Nakanishi ,  Toshihiro Rifu ,  Souji Miyashita

    发明人： Miwa Okumura ,  Masahiko Yamazaki ,  Satoru Nakanishi ,  Toshihiro Rifu ,  Souji Miyashita

    IPC分类号： G01T7/00 ,  A61B6/03 ,  G01T1/20 ,  G06T1/00 ,  A61B6/00

    CPC分类号： A61B6/032 ,  A61B6/027

    摘要： An X-ray apparatus including an X-ray source, a rotation mechanism which rotates the X-ray source about a rotational axis, and an X-ray detector having a plurality of detection elements. A blocking member defining a slit structure is provided between the X-ray source and the X-ray detector. The slits of the blocking member include two rows aligned in a channel direction of the detector elements, and two rows staggered in the channel direction, thereby to obtain a CT image with improved spatial resolution. Alternatively, instead of using a blocking member, some of the detection elements of at least one detection segment are staggered in the channel direction with respect to detection elements of another detection segment.

    摘要翻译： 一种X射线设备，包括X射线源，使X射线源围绕旋转轴线旋转的旋转机构和具有多个检测元件的X射线检测器。 限定狭缝结构的阻挡构件设置在X射线源和X射线检测器之间。 阻挡构件的狭缝包括在检测器元件的通道方向上排列的两列，并且在通道方向上交错排列的两列，从而获得具有改善的空间分辨率的CT图像。 或者，代替使用阻挡构件，至少一个检测段的一些检测元件相对于另一个检测段的检测元件在通道方向上错开。

    X-ray computed tomography apparatus
    3.
    发明授权
    X-ray computed tomography apparatus 失效
    X射线计算机断层摄影装置

    公开(公告)号：US06778628B2

    公开(公告)日：2004-08-17

    申请号：US10401680

    申请日：2003-03-31

    申请人： Masahiko Yamazaki ,  Miwa Okumura ,  Shinsuke Tsukagoshi

    发明人： Masahiko Yamazaki ,  Miwa Okumura ,  Shinsuke Tsukagoshi

    IPC分类号： A61B603

    CPC分类号： A61B6/032 ,  A61B6/4014 ,  A61B6/4085 ,  A61B6/4266 ,  A61B6/463 ,  A61B6/467 ,  A61B6/542 ,  A61B6/583 ,  Y10S378/901

    摘要： An X-ray computed tomography apparatus is provided to reconstruct image data based on projection data acquired by scanning a subject with an X-ray. A calculator is configured to calculate a dose efficiency index based on an expected dose of an X-ray radiated from an input device. The dose efficiency index indicates a diameter of a target which is identified at a predetermined detectability rate and has a predetermined CT value difference with respect to a surrounding CT value. A plan support system is configured to build up a scan planning screen on which the input expected dose is contained along with the calculated dose efficiency index. The scan planning screen is displayed on a display.

    摘要翻译： 提供X射线计算机断层摄影装置，用于基于通过用X射线扫描对象获取的投影数据来重建图像数据。 计算器被配置为基于从输入设备辐射的X射线的预期剂量来计算剂量效率指数。 剂量效率指数表示以预定的检测率被识别并且相对于周围CT值具有预定的CT值差的目标的直径。 计划支持系统被配置为建立扫描计划屏幕，其中包含输入预期剂量以及计算的剂量效率指数。 扫描计划画面显示在显示屏上。

    X-ray computerized tomography apparatus
    6.
    发明授权
    X-ray computerized tomography apparatus 失效
    X线计算机断层摄影仪

    公开(公告)号：US5566220A

    公开(公告)日：1996-10-15

    申请号：US378095

    申请日：1995-01-25

    申请人： Yasuo Saito ,  Mitsuru Yahata ,  Tadaharu Kobayashi ,  Masahiko Yamazaki

    发明人： Yasuo Saito ,  Mitsuru Yahata ,  Tadaharu Kobayashi ,  Masahiko Yamazaki

    IPC分类号： H01J35/14 ,  H05G1/26 ,  H05G1/52 ,  H01J35/00

    CPC分类号： H05G1/26 ,  H01J35/14 ,  H05G1/52

    摘要： In an X-ray computerized tomography apparatus, a water phantom is interposed between an X-ray tube unit and an X-ray detector in place of a subject under examination and a plurality of pieces of data detected by a plurality of X-ray detector elements are previously measured as a pieces of compensation data while shifting the X-focal point to different positions. Compensation data corresponding to the actual position of the X-ray focal point, which shifts according to the thermal state of the X-ray tube unit, is selected to correct detect data obtained for a subject under examination, permitting optimum compensation of variations in sensitivity among the X-ray detector elements for any position of the X-ray focal point, thereby preventing a ring-like artifact from being produced on a tomography image.

    摘要翻译： 在X射线计算机断层摄影装置中，代替受检对象，在X射线管单元和X射线检测器之间插入水体，并且由多个X射线检测器检测出多个数据 元素先前被测量为一块补偿数据，同时将X焦点移动到不同的位置。 选择与根据X射线管单元的热状态移动的X射线焦点的实际位置对应的补偿数据，以校正对被检查对象获得的检测数据，从而允许对灵敏度变化的最佳补偿 在用于X射线焦点的任何位置的X射线检测器元件中，从而防止在断层摄影图像上产生环状假象。

    Method of manufacture of magnetic head
    7.
    发明授权
    Method of manufacture of magnetic head 失效
    磁头制造方法

    公开(公告)号：US4999904A

    公开(公告)日：1991-03-19

    申请号：US543498

    申请日：1990-06-26

    申请人： Shinichi Nanjyo ,  Masahiko Yamazaki

    发明人： Shinichi Nanjyo ,  Masahiko Yamazaki

    IPC分类号： G11B5/29

    CPC分类号： G11B5/295 ,  G11B5/012 ,  G11B5/1272 ,  Y10T29/49048 ,  Y10T29/49057

    摘要： A method for manufacture of a bulk-type magnetic head capable of performing a frame recording operation. A pair of magnetic core blocks with magnetic gaps formed in butt surfaces thereof are slit and comb-toothed to produce a pair of head element couplers, and such element couplers are joined to each other in a state where the comb-toothed portions of one coupler are inserted into the slits in the other coupler while the respective coupling portions are butted to each other, whereby the in-line precision of the magnetic gaps can be enhanced.

    Linear motion device
    8.
    发明授权
    Linear motion device 有权
    直线运动装置

    公开(公告)号：US07278332B2

    公开(公告)日：2007-10-09

    申请号：US10345362

    申请日：2003-01-16

    申请人： Shinya Nakatani ,  Masahiko Yamazaki ,  Hirotoshi Miyajima ,  Yasuyuki Matsuda

    发明人： Shinya Nakatani ,  Masahiko Yamazaki ,  Hirotoshi Miyajima ,  Yasuyuki Matsuda

    IPC分类号： F16C29/06 ,  F16H25/22

    CPC分类号： F16C33/3706 ,  F16C29/0638 ,  F16H25/2238 ,  Y10T74/18568 ,  Y10T74/18744 ,  Y10T74/19749 ,  Y10T74/19777

    摘要： A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.

    摘要翻译： 直线运动装置具有：外部装配到轴上并沿轴线进行相对直线运动的直线运动体; 保持在形成于所述直线运动体的内表面的滚动元件槽中的多个滚珠以及所述滚动元件槽与所述轴之间的滚动; 插入球之间的分隔器; 以及循环路径，其形成在所述直线运动体中并且用于使所述滚珠从所述滚动元件槽的一端侧向另一端侧循环; 其特征在于，线性运动装置在40℃下运动粘度为JIS K2220和50-500mm 2 / s所定义的加工渗透率为220-395的基础油的润滑脂。

    X-RAY CT APPARATUS AND AN IMAGE CONTROLLING METHOD THEREOF
    9.
    发明申请
    X-RAY CT APPARATUS AND AN IMAGE CONTROLLING METHOD THEREOF 失效
    X射线CT装置及其图像控制方法

    公开(公告)号：US20070147576A1

    公开(公告)日：2007-06-28

    申请号：US11617236

    申请日：2006-12-28

    申请人： Masahiko Yamazaki

    发明人： Masahiko Yamazaki

    IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/469

    摘要： An X-ray CT apparatus and image controlling method thereof that achieves a higher time resolution tomography image on a region of interest (ROI) of an object while reducing a total amount of X-ray irradiation exposure. The X-ray CT apparatus includes an X-ray source for irradiating X-rays over an object, a multi-slice detector provided facing to the X-ray source for acquiring wide range projection data by a first helical scan, a wide range projection data memory unit for storing the wide range projection data, and a narrow range projection data memory unit for storing the narrow range projection data of a designated region of interest (ROI) only. A controlling method for the X-ray CT apparatus acquires narrow range projection data by a second scan on the ROI along a slice direction and generates compounded projection data based on the narrow range projection data and the wide range projection data. The method generates images based on the compounded projection data.

    摘要翻译： 一种X射线CT装置及其图像控制方法，其在减少X射线照射曝光的总量的同时，在对象的感兴趣区域（ROI）上实现更高分辨率的断层摄影图像。 X射线CT装置包括用于在物体上照射X射线的X射线源，面向X射线源设置的多切片检测器，用于通过第一螺旋扫描获取宽范围投影数据，宽范围投影 用于存储宽范围投影数据的数据存储单元和用于仅存储指定的感兴趣区域（ROI）的窄范围投影数据的窄范围投影数据存储单元。 X射线CT装置的控制方法通过沿着切片方向的ROI上的第二扫描获取窄范围投影数据，并且基于窄范围投影数据和宽范围投影数据生成复合投影数据。 该方法基于复合投影数据生成图像。