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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0420020 (1995-04-11) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 286 인용 특허 : 0 |
A system for externally locating a sensor in tissue, comprising an external probe including at least first and second electromagnetic output coils with non-parallel longitudinal axes; and output coil driver for alternately energizing the first and second output coils, for generating a time-varying m
A system for externally locating a sensor in tissue, comprising an external probe including at least first and second electromagnetic output coils with non-parallel longitudinal axes; and output coil driver for alternately energizing the first and second output coils, for generating a time-varying magnetic field which penetrates the patient\s skin; a sensor coil, having a longitudinal axis, for developing an induced electrical voltage in response to the time-varying magnetic field; a distance determinator, responsive to the induced voltage from the sensor coil, for determining from the induced voltage, the distance between the output coils and the sensor coil, independently of the relative angle, in a horizontal plane, between the sensor coil longitudinal axis, and the longitudinal axes of the output coils; and a direction determinator for determining and displaying the direction, in the horizontal plane, in which the sensor coil longitudinal axis is pointing.
For externally locating a sensor in tissue, a system comprising: a) an external probe including at least first and second output coils having respective non-parallel first and second output-coil axes; b) an output coil-driver circuit that alternately so energizes the first and second output coils as
For externally locating a sensor in tissue, a system comprising: a) an external probe including at least first and second output coils having respective non-parallel first and second output-coil axes; b) an output coil-driver circuit that alternately so energizes the first and second output coils as to generate first and second time-varying magnetic fields that penetrate the tissue; c) a sensor coil that has a sensor-coil axis and develops first and second sensor signals in response to the first and second time-varying magnetic fields, respectively; and d) a distance determinator that determines from the first and second sensor signals, independently of the relative angles between the projection of the sensor-coil axis and the projections of the first and second output-coil axes into a plane parallel to the first and second output-coil axes, the distance between the sensor coil and the output coils and generates a distance signal representative of the distance thus determined.
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