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Accuracy and electromagnetic Safety Evaluation of a Portable electromagnetic localization System for Micro Invasive Medical Devices in Vivo

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Journal of Donghua University(English Edition) 2009年第2期26卷 189-194页

作者：李鸿炜颜国正姜萍萍 820 Institute Department of Instrument Science & EngineeringShanghai Jiaotong University

Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately,a portable alternating current(AC)electromagnetic localization system is *** verify the feasibility of the method,the model and construction of the localization system are *** static and dynamic accuracy of the localization system are tested by ***,we compare the simulating results of the electromagnetic radiation aroused by the localization system with the electromagnetic safety standards of human(ICNIRP guidelines and IEEE standard C95.1-1991).Finally,in terms of the results of the static and dynamic experiments,conclusions are drawn that the accuracy of portable positioning system is high(less than 10 mm)enough to satisfy the localization need of the micro invasive medical devices in vivo,and there is no harm of electromagnetic radiation to human.

关键词： electromagnetic localization portable micro medical devices in vivo electromagnetic safety

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A wireless magnetic sensor for localizing in-vivo medical micro-devices

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High Technology Letters 2010年第2期16卷 199-203页

作者：郭旭东 Yan Rongguo Yan Guozheng School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology Shanghai 200093 P.R. China School of Electronics and Information Technology Shanghai Jiaotong University Shanghai 200240 P.R. China

In order to measure the position and orientation of in-vivo medical micro-devices without the line-of- sight constraints, a wireless magnetic sensor is developed for an electromagnetic localization method. In the electromagnetic localization system, the wireless magnetic sensor is embedded in the micro-devices to measure alternating magnetic signals. The wireless magnetic sensor is composed of an induction coil, a signal processor, a radio frequency （R.F） transmitter, a power manager and batteries. Based on the principle of electromagnetic induction, the induction coil converts the alternating magnetic signals into electrical signals. Via the RF transmitter, the useful data am wirelessly sent outside the body. According to the relation between the magnetic signals and the location, the position and orientation of the micro-devices can be calculated. The experiments demonstrate the feasibility of localizing in-vivo medical micro-devices with the wireless magnetic sensor. The novel localization system is accurate and robust.

关键词： medical micro-devices electromagnetic localization wireless magnetic sensor

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