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    • 13. 发明授权
    • Apparatus and method for shaped magnetic field control for catheter, guidance, control, and imaging
    • 用于导管,引导,控制和成像的成形磁场控制的装置和方法
    • US08027714B2
    • 2011-09-27
    • US11140475
    • 2005-05-27
    • Yehoshua Shachar
    • Yehoshua Shachar
    • A61B5/05A61B5/06
    • A61B5/06A61B1/00158A61B5/0507A61B5/062A61B34/25A61B34/70A61B34/73A61B34/77A61B2017/00703A61B2034/2051A61B2034/2063A61B2034/732A61B2090/376A61M25/0127A61M2025/0166
    • A variable magnet system for manipulating a magnetic catheter is described. In one embodiment, a cluster of electromagnets is configured to generate a desired magnetic field. In one embodiment, one or more poles of the cluster are moveable with respect to other poles in the cluster to allow shaping of the magnetic field. In one embodiment, one or more magnetic poles can be extended or retracted to shape the magnetic field. In one embodiment, the electromagnets can be positioned to generate magnetic fields that exert a desired torque and/or movement force on the catheter. In one embodiment, the catheter guidance system includes a closed-loop servo feedback system. In one embodiment, a radar system is used to determine the location of the distal end of the catheter inside the body, thus, minimizing or eliminating the use of ionizing radiation such as X-rays. The catheter guidance system can also be used in combination with an X-ray system (or other imaging systems) to provide additional imagery to the operator. The magnetic system used in the magnetic catheter guidance system can also be used to locate the catheter tip to provide location feedback to the operator and the control system. In one embodiment, a magnetic field source is used to create a magnetic field of sufficient strength and orientation to move a magnetically-responsive catheter tip in a desired direction by a desired amount.
    • 描述了用于操纵磁导管的可变磁体系统。 在一个实施例中,一组电磁体被配置为产生期望的磁场。 在一个实施例中,簇的一个或多个极可相对于簇中的其它极点移动,以允许磁场成形。 在一个实施例中,可以延伸或缩回一个或多个磁极以使磁场成形。 在一个实施例中,电磁体可以被定位成产生在导管上施加期望的扭矩和/或移动力的磁场。 在一个实施例中,导管引导系统包括闭环伺服反馈系统。 在一个实施例中,使用雷达系统来确定导管在体内的远端的位置,从而最小化或消除诸如X射线的电离辐射的使用。 导管引导系统还可以与X射线系统(或其他成像系统)组合使用,以向操作者提供额外的图像。 用于磁导管引导系统的磁系统也可用于定位导管尖端以向操作者和控制系统提供位置反馈。 在一个实施例中,使用磁场源来产生具有足够强度和取向的磁场,以将磁响应导管尖端沿所需方向移动所需量。
    • 19. 发明授权
    • System and method for radar-assisted catheter guidance and control
    • 雷达辅助导管引导和控制的系统和方法
    • US07873402B2
    • 2011-01-18
    • US11869668
    • 2007-10-09
    • Yehoshua Shachar
    • Yehoshua Shachar
    • A61B5/05
    • A61B5/06A61B1/00158A61B5/064A61B5/7455A61B2034/732
    • A Catheter Guidance Control and Imaging (CGCI) system whereby a magnetic tip attached to a surgical tool is detected, displayed and influenced positionally so as to allow diagnostic and therapeutic procedures to be performed is described. The tools that can be so equipped include catheters, guidewires, and secondary tools such as lasers and balloons. The magnetic tip performs two functions. First, it allows the position and orientation of the tip to be determined by using a radar system such as, for example, a radar range finder or radar imaging system. Incorporating the radar system allows the CGCI apparatus to detect accurately the position, orientation and rotation of the surgical tool embedded in a patient during surgery. In one embodiment, the image generated by the radar is displayed with the operating room imagery equipment such as, for example, X-ray, Fluoroscopy, Ultrasound, MRI, CAT-Scan, PET-Scan, etc. In one embodiment, the image is synchronized with the aid of fiduciary markers located by a 6-Degrees of Freedom (6-DOF) sensor. The CGCI apparatus combined with the radar and the 6-DOF sensor allows the tool tip to be pulled, pushed, turned, and forcefully held in the desired position by applying an appropriate magnetic field external to the patient's body. A virtual representation of the magnetic tip serves as an operator control. This control possesses a one-to-one positional relationship with the magnetic tip inside the patient's body. Additionally, this control provides tactile feedback to the operator's hands in the appropriate axis or axes if the magnetic tip encounters an obstacle. The output of this control combined with the magnetic tip position and orientation feedback allows a servo system to control the external magnetic field.
    • 导管引导控制和成像(CGCI)系统,其中检测,显示和影响位置的附着于外科手术工具的磁尖以便允许执行诊断和治疗程序。 可以配备的工具包括导管,导线和辅助工具,如激光和气球。 磁头提供两个功能。 首先,它允许通过使用诸如雷达测距仪或雷达成像系统的雷达系统确定尖端的位置和取向。 结合雷达系统允许CGCI装置精确地检测手术中嵌入患者的手术工具的位置,方向和旋转。 在一个实施例中,由诸如例如X射线,荧光透视,超声,MRI,CAT扫描,PET扫描等的手术室图像设备显示由雷达产生的图像。在一个实施例中,图像 与通过6自由度(6自由度)传感器定位的受信标记的帮助同步。 与雷达和6自由度传感器相结合的CGCI设备允许通过在患者身体外部施加适当的磁场来将工具尖端拉动,推动,转动并强制地保持在所需位置。 磁尖端的虚拟表示作为操作者控制。 该控制与患者体内的磁尖具有一对一的位置关系。 此外,如果磁头遇到障碍物,该控制可以在适当的轴或轴上向驾驶员的手提供触觉反馈。 该控制的输出结合磁头位置和方向反馈允许伺服系统控制外部磁场。