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    Shielded surgical navigation system that determines the position and orientation of the tracked object with real and virtual dipoles
    2.
    发明授权
    Shielded surgical navigation system that determines the position and orientation of the tracked object with real and virtual dipoles 有权
    屏蔽外科导航系统，确定跟踪对象与实际和虚拟偶极子的位置和方向

    公开(公告)号：US08571636B2

    公开(公告)日：2013-10-29

    申请号：US12238545

    申请日：2008-09-26

    Applicant: Chunwu Wu

    Inventor： Chunwu Wu

    IPC: A61B5/05

    CPC classification number: G01B7/003 ,  A61B34/20 ,  A61B90/36 ,  A61B2034/2051 ,  A61B2034/2074 ,  A61B2090/3958 ,  A61B2090/3975

    Abstract: A system for determining the position and orientation of a tracked object by measuring electromagnetic energy. The system includes a shield of magnetic permeable material positioned on one side of the object to be tracked. A transmitter emits the electromagnetic energy and there is a tracker sensor. One of the transmitter or tracker sensor is attached to the object to be tracked. A correction sensor is at fixed location relative to the transmitter assembly. Both sensors assemblies measure the electromagnetic energy emitted by the transmitter. Based on the energy measured by the correction sensor, the location of a virtual dipole that mirrors the transmitter, the real dipole, on the opposite side of the shield is determined. Based on the positions of the real and virtual dipoles and the energy measured by the tracker sensor, the position and orientation of the tracker sensor relative to the transmitter is determined.

    Abstract translation: 一种用于通过测量电磁能来确定被跟踪物体的位置和姿态的系统。 该系统包括位于被跟踪物体的一侧的可磁性渗透材料的屏蔽层。 发射器发射电磁能，并有一个跟踪传感器。 发射器或跟踪器传感器之一连接到要跟踪的对象。 校正传感器位于相对于发射器组件的固定位置。 两个传感器组件都测量发射机发出的电磁能量。 基于由校正传感器测量的能量，确定在屏蔽的相对侧上映射发射器的虚拟偶极子的位置，即真实的偶极子。 基于真实和虚拟偶极子的位置以及由跟踪器传感器测量的能量，确定跟踪器传感器相对于发射器的位置和方位。

    System and method for electromagnetic navigation in the vicinity of a metal object
    7.
    发明申请
    System and method for electromagnetic navigation in the vicinity of a metal object 审中-公开

    公开(公告)号：US20060264732A1

    公开(公告)日：2006-11-23

    申请号：US11123985

    申请日：2005-05-05

    Applicant: Chunwu Wu

    Inventor： Chunwu Wu

    IPC: A61B5/05

    CPC classification number: A61B5/06 ,  A61B5/062 ,  A61B5/7257 ,  A61B34/20 ,  A61B90/36 ,  A61B2034/2051 ,  A61B2090/397

    Abstract: A system and method for performing object localization based on the emission of electromagnetic fields. The electromagnetic fields are simultaneously emitted from different transmitters. One electromagnetic field is emitted at a base frequency; the remaining waves are emitted at frequencies that are harmonics of the base frequency. The composite magnetic fields are measured by sensors. The signal generated by each sensor is subject to a Fourier analysis to determine the strengths of the individual electromagnetic fields forming the composite electromagnetic field. These individual measure field strength data are then used to determine the position and orientation of the sensors relative to the transmitters.

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