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    • 6. 发明公开
    • POSITION DETECTION IN A MAGNETIC FIELD
    • EINEM MAGNETFELD的定位
    • EP1974188A2
    • 2008-10-01
    • EP06849115.8
    • 2006-12-29
    • Medtronic Image-Guided Neurologics, Inc.
    • WURMFELD, DavidSOLAR, Matthew, S.
    • G01D5/26
    • G01D5/34723A61B34/20A61B90/11A61B90/37A61B90/39A61B2017/3409A61B2034/2059A61B2090/062A61B2090/374A61B2090/3945Y10T29/49826
    • Assemblies and methods for remotely detecting a position of a surgical instrument (102) in the presence of a magnetic field. An encoder (126) is coupled to move in concert with the instrument (102). A translucent substrate and light blocking indicia (406) are disposed on the encoder (126). A light source (128) and a light detector array (130) are effectively disposed outside of the magnetic field. Light from the light source (128) is carried to the encoder first side using an input optical fiber (120). Light passing through the encoder (126) is received at an encoder second side by an output optical fiber (122), and thus transmitted to the light detector array (130), which converts the received light to position representative electrical signals. Such signals are subsequently transmitted to a control module (134) that formulates and conveys a position of the instrument (102).
    • 该专利文献讨论了用于在存在磁场的情况下远程检测外科器械的位置的组件和方法。 在可变示例中,位置检测系统包括耦合以与仪器协同移动的编码器。 编码器包括透光性基板和设置在其上的遮光标记。 光源和光检测器阵列有效地设置在磁场之外。 使用输入光纤将来自光源的光传送到编码器第一侧,而通过编码器的光通过输出光纤在编码器第二侧被接收。 由输出光纤接收的光被传输到光检测器阵列,其将接收到的光转换成位置代表性的电信号。 这样的信号随后被传送到适于配制和传送仪器位置的控制模块。