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    • 101. 发明授权
    • MR imaging method and apparatus with water signal supression
    • 具有水信号抑制的MR成像方法和装置
    • US5751145A
    • 1998-05-12
    • US689786
    • 1996-08-13
    • Koji Shimizu
    • Koji Shimizu
    • G01R33/48A61B5/055G01R33/54A01B5/055
    • G01R33/4835
    • An MR imaging method using NMR phenomenon and including the following steps: emitting a first group of RF pulses including a first inversion RF pulse, and excitation RF pulses emitted to excite a plurality of slices in a predetermined order; emitting slice-selecting gradient field pulses; emitting phase-encoding gradient field pulses; collecting a first group of echo signals; emitting a second group of RF pulses including a second inversion RF pulse having substantially the same frequency band as the first inversion RF pulse, and second excitation RF pulses emitted to excite the plurality of slices in a reverse order; emitting slice-selecting gradient field pulses; emitting phase-encoding gradient field pulses; collecting a second group of echo signals; repeating this pulse sequence while varying the phase-encoding gradient field pulses; adding two data corresponding to each slice, which data are included, respectively, in a first group of data and in a second group of data, thereby forming a new group of data; and reconstructing slice images.
    • 一种使用NMR现象的MR成像方法,包括以下步骤:发射包括第一反转RF脉冲的第一组RF脉冲和发射的激发RF脉冲以按预定顺序激发多个切片; 发射切片选择梯度场脉冲; 发射相位编码梯度场脉冲; 收集第一组回波信号; 发射第二组RF脉冲,包括具有与第一反相RF脉冲基本相同的频带的第二反转RF脉冲,以及发射的第二激发RF脉冲以相反的顺序激发多个切片; 发射切片选择梯度场脉冲; 发射相位编码梯度场脉冲; 收集第二组回波信号; 在改变相位编码梯度场脉冲的同时重复该脉冲序列; 在第一组数据和第二组数据中分别加入与每个切片相对应的两个数据,哪些数据被包括在内,从而形成新的数据组; 并重建切片图像。
    • 105. 发明授权
    • Method for the production of spherical silicone gel particles
    • 制备球形硅胶凝胶颗粒的方法
    • US4824616A
    • 1989-04-25
    • US200828
    • 1988-06-01
    • Koji ShimizuMitsuo Hamada
    • Koji ShimizuMitsuo Hamada
    • C08J3/12B29B9/06C08J3/24C08L83/05C08L83/07B29B9/00
    • C08J3/243B29B9/06B29K2083/00B29K2105/0061C08J2383/06Y10T428/2995
    • Spherical gel particles with elastomeric surfaces are made by dripping a liquid silicone gel composition containing alkenyl-containing organopolysiloxane, organohydrogenpolysiloxane, and a platinum catalyst into water or surfactant-containing water, curing and then contacting the surface of the silicone gel particles to organohydrogenpolysiloxane and curing to provide the elastomeric surface. The liquid silicone gel composition can also be extruded in fiber form into the water or surfactant-containing water with stirring to form the spherical particles which are cured and then the surface is contacted with organohydrogenpolysiloxane forming the silicone gel particles with elastomer surface. Alternatively, the liuqid silicone gel composition can be dripped or extruded in fiber form into a liquid having organohydrogenpolysiloxane to form the silicone gel particles with elastomer surface when the particles are cured. These spherical silicone gel particles are uniform and can be used to modify organic resins and be used for vibration absorption.
    • 具有弹性体表面的球形凝胶颗粒通过将含有含烯基的有机聚硅氧烷,有机氢聚硅氧烷和铂催化剂的液体硅氧烷凝胶组合物滴入水或含表面活性剂的水中来制备,固化然后使硅胶凝胶颗粒的表面与有机氢聚硅氧烷接触并固化 以提供弹性体表面。 液体硅凝胶组合物也可以在搅拌下以纤维形式挤出到含水或含表面活性剂的水中以形成固化的球形颗粒,然后使表面与形成具有弹性体表面的硅氧烷凝胶颗粒的有机氢聚硅氧烷接触。 或者,当颗粒固化时,可以将纤维形式的液体聚硅氧烷凝胶组合物滴落或挤出成具有有机氢聚硅氧烷的液体以形成具有弹性体表面的硅氧烷凝胶颗粒。 这些球形硅凝胶颗粒是均匀的,可用于改性有机树脂并用于振动吸收。