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    • 93. 发明申请
    • Magnetic resonance imaging and magnetic navigation systems and methods
    • 磁共振成像和磁导航系统及方法
    • US20050182315A1
    • 2005-08-18
    • US10983963
    • 2004-11-08
    • Rogers RitterRaju ViswanathanRoger Hastings
    • Rogers RitterRaju ViswanathanRoger Hastings
    • A61B19/00G01R33/28G01R33/38A61B5/055
    • G01R33/3808A61B34/70A61B34/73A61B2034/732A61B2090/374G01R33/285G01R33/3806
    • A system for magnetically imaging an operating region in a subject and magnetically navigating a medical device within the operating region includes a first magnet for applying a static magnetic field to the operating region of sufficient strength for magnetically imaging the operating region and sufficiently strong to permit a medical device to be oriented in the operating region by creating a magnetic moment at the distal end of the medical device, and a second magnet for applying a static magnetic field to the operating region of sufficient strength for magnetically imaging the operating region and sufficiently strong to permit a medical device to be oriented in the operating region by creating a magnetic moment at the distal end of the medical device. In an alternate construction, the system includes a first magnet that is movable between a first position to apply a first static magnetic field to the operating region and a second position to apply a second static magnetic field to the operating region. The method of the invention includes applying a first static magnetic field to the operating region and MR imaging and magnetically navigating a device in the first static field, and then applying a second static magnetic field to the operating region, in a different direction than the first direction, and MR imaging and magnetically navigating a device in the second static field.
    • 用于磁性地成像对象中的操作区域并且在操作区域内磁性导航医疗设备的系统包括用于向运行区域施加足够强度的静态磁场的第一磁体,用于对操作区域进行磁性成像并且足够强以允许 医疗装置通过在医疗装置的远端产生磁矩而在操作区域中定向;以及第二磁体,用于向操作区域施加足够强度的静磁场,以对磁场成像操作区域并足够强 通过在医疗装置的远端产生磁矩,允许医疗装置在操作区域中定向。 在替代结构中,该系统包括第一磁体,该第一磁体可在施加第一静态磁场到操作区域的第一位置和第二位置之间移动,以将第二静态磁场施加到操作区域。 本发明的方法包括将第一静态磁场施加到操作区域和MR成像并在第一静态场中磁性地导航设备,然后以与第一静态磁场不同的方向向操作区域施加第二静态磁场 方向和MR成像,并在第二静态场中磁性导航设备。
    • 99. 发明授权
    • Temporary stent and method of use
    • 临床支架及使用方法
    • US5716410A
    • 1998-02-10
    • US577089
    • 1995-12-22
    • Lixiao WangRoger HastingsPaul BuscemiSew-Wah Tay
    • Lixiao WangRoger HastingsPaul BuscemiSew-Wah Tay
    • A61F2/00A61F2/06A61F2/84A61F2/88A61M25/10A61F2/04A61M25/00
    • A61M25/1027A61F2/88A61F2/958A61F2210/0033A61F2230/0017A61M2025/0058A61M2025/1004
    • A temporary stent comprises a coil of tubular thermoplastic material and a heating element inside the tubular material, or a film with a metal film resistive heating element coated thereon. A method of temporarily supporting the wall of a vessel comprises the steps of inserting a thermoplastic body having a first outer dimension less than the inside dimension of the vessel into the vessel to the desired support position; heating the thermoplastic above its softening transition temperature and expanding it to a second outer dimension larger than its first outer dimension; cooling the thermoplastic body to below its softening transition temperature while at its second outer dimension; allowing the cooled thermoplastic body to temporarily support the vessel; heating the thermoplastic above its softening transition temperature to soften the thermoplastic; and removing the softened thermoplastic body from the vessel.
    • 临时支架包括管状热塑性材料的线圈和管状材料内的加热元件,或者涂覆有金属膜电阻加热元件的膜。 临时支撑容器壁的方法包括以下步骤:将具有小于容器的内部尺寸的第一外部尺寸的热塑性主体插入容器中至所需的支撑位置; 将热塑性塑料高于其软化转变温度并将其膨胀至大于其第一外部尺寸的第二外部尺寸; 在其第二外部尺寸下将热塑性体冷却至其软化转变温度以下; 允许冷却的热塑性体暂时支撑容器; 将热塑性塑料加热到其软化转变温度以软化热塑性塑料; 以及从容器中去除软化的热塑性体。