公开(公告)号：US20140051985A1

公开(公告)日：2014-02-20

申请号：US13913649

申请日：2013-06-10

Applicant: Tailin Fan ,  Christopher A. Cook

Inventor： Tailin Fan ,  Christopher A. Cook

IPC: A61B1/00 ,  A61B17/34 ,  A61B1/307

CPC classification number: A61B1/00158 ,  A61B1/00004 ,  A61B1/307 ,  A61B5/062 ,  A61B17/3403 ,  A61B2034/2048 ,  A61B2034/2051 ,  A61B2034/2072

Abstract: A target finding system identifies a surgical target such as a kidney stone by disposing an emitter such as a magnetic source behind or adjacent the surgical target, and employing a circuit to identify an axis to the emitter, thus defining an axis or path to the surgical target. An array of sensors arranged in an equidistant, coplanar arrangement each senses a signal indicative of a distance to the emitter. A magneto resistor sensor generates a variable resistance is responsive to the distance to a magnetic coil emitting a magnetic field. An equal signal from each of the coplanar sensors indicates positioning on an axis passing through a point central to the sensors and orthogonal to the plane. In one embodiment, a pair of Wheatstone bridges enhances the accuracy of the system.

Abstract translation: 目标发现系统通过在外科手术目标之后或邻近手术靶设置诸如磁源的发射器​​（例如，肾结石）来识别手术靶标，并且使用电路来识别发射器的轴线，从而限定到外科手术的轴线或路径 目标。 布置成等距，共面布置的传感器阵列每个感测到指示到发射器的距离的信号。 磁电阻传感​​器产生可变电阻，其响应于发射磁场的磁线圈的距离。 来自每个共面传感器的相等信号表示在通过传感器中心点并且与平面正交的轴上的定位。 在一个实施例中，一对惠斯登电桥增强了系统的精度。