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7 条记录 (耗时 0.01 秒)

    NMR Imaging method
    4.
    发明公开
    NMR Imaging method 失效
    NMR成像方法

    公开(公告)号：EP0208236A3

    公开(公告)日：1989-01-11

    申请号：EP86108947.2

    申请日：1986-07-01

    申请人： HITACHI, LTD.

    发明人： Sano, Koichi Hitachi Fujigaoka-ryo ,  Yokoyama, Tetsuo ,  Takeda, Ryuzaburo ,  Ozawa, Yasuhiko ,  Sato, Shinichi Hitachi Nijigaoka-ryo ,  Koizumi, Hideaki

    IPC分类号： G01R33/48 ,  A61B6/00 ,  A61B5/02

    CPC分类号： G01F1/716 ,  G01R33/56308 ,  G01R33/56316

    摘要： A slice selection gradient magnetic field used in a pulse sequence for generating a spin echo signal is applied in such a fashion that its polarity at the time of a 90° pulse becomes opposite to the one at the time of 180° pulse, in order to expand a dynamic range of blood flow speed measurement. When the blood flow speed contains a component in a slice vertical direction, the gradient magnetic field in the slice vertical direction is adjusted so that the phase changes of two sets of flow encoded pulses contained in the slice vertical direction are opposite to each other. The flow speed in the direction of the read-out gradient magnetic field, which is a lateral direction of the slide plane, is purely measured by cancelling influences of the flow in the slice vertical direction.

    Charged particle beam alignment method and charged particle beam apparatus
    5.
    发明公开
    Charged particle beam alignment method and charged particle beam apparatus 有权
    带电粒子束对准方法和带电粒子束仪

    公开(公告)号：EP2309530A3

    公开(公告)日：2011-12-07

    申请号：EP10012302.5

    申请日：2002-05-21

    申请人： Hitachi, Ltd.

    发明人： Sato, Mitsugu ,  Otaka, Tadashi ,  Ezumi, Makoto ,  Takane, Atsushi ,  Yoshida, Shoji ,  Yamaguchi, Satoru ,  Ozawa, Yasuhiko

    IPC分类号： H01J37/147 ,  H01J37/28

    CPC分类号： H01J37/1471 ,  H01J37/28 ,  H01J2237/1501 ,  H01J2237/153

    摘要： An object of the present invention is to provide a charged particle beam apparatus and an alignment method of the charged particle beam apparatus, which make it possible to align an optical axis of a charged particle beam easily even when a state of the charged particle beam changes. The present invention comprises calculation means for calculating a deflection amount of an alignment deflector which performs an axis alignment for an objective lens, a plurality of calculation methods for calculating the deflection amount is memorized in the calculation means, and a selection means for selecting at least one of the calculation methods is provided.

    摘要翻译： 本发明的目的在于提供一种带电粒子束装置以及带电粒子束装置的对准方法，即使带电粒子束的状态发生变化，也能够容易地对准带电粒子束的光轴 。 本发明包括用于计算执行物镜的轴对准的对准偏转器的偏转量的计算装置，用于计算偏转量的多种计算方法被存储在计算装置中，以及选择装置，用于至少选择 提供了一种计算方法。

    NMR Imaging method
    7.
    发明公开
    NMR Imaging method 失效
    通过核磁共振的手段图像生成的方法。

    公开(公告)号：EP0208236A2

    公开(公告)日：1987-01-14

    申请号：EP86108947.2

    申请日：1986-07-01

    申请人： HITACHI, LTD.

    发明人： Sano, Koichi Hitachi Fujigaoka-ryo ,  Yokoyama, Tetsuo ,  Takeda, Ryuzaburo ,  Ozawa, Yasuhiko ,  Sato, Shinichi Hitachi Nijigaoka-ryo ,  Koizumi, Hideaki

    IPC分类号： G01R33/48 ,  A61B6/00 ,  A61B5/02

    CPC分类号： G01F1/716 ,  G01R33/56308 ,  G01R33/56316

    摘要： A slice selection gradient magnetic field used in a pulse sequence for generating a spin echo signal is applied in such a fashion that its polarity at the time of a 90° pulse becomes opposite to the one at the time of 180° pulse, in order to expand a dynamic range of blood flow speed measurement. When the blood flow speed contains a component in a slice vertical direction, the gradient magnetic field in the slice vertical direction is adjusted so that the phase changes of two sets of flow encoded pulses contained in the slice vertical direction are opposite to each other.
    The flow speed in the direction of the read-out gradient magnetic field, which is a lateral direction of the slide plane, is purely measured by cancelling influences of the flow in the slice vertical direction.