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PERCUTANEOUS NEPHROLITHOTOMY TARGET FINDING SYSTEM
专利权人:
Tailin Fan
发明人:
Tailin Fan,Christopher A. Cook
申请号:
US13913649
公开号:
US20140051985A1
申请日:
2013.06.10
申请国别(地区):
US
年份:
2014
代理人:
摘要:
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.
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