Accuracy and Electromagnetic Safety Evaluation of a Portable Electromagnetic Localization System for Micro Invasive Medical Devices in Vivo

Aiming at localizing the telemetric capsule for detecting gastrointestinal physiological parameters in vivo accurately, a portable alternating current ( AC ) electromagnetic localization system is designed. To verify the feasibility of the method, the model and construction of the localization system are detailed. And static and dynamic accuracy of the localization system are tested by experiments. Next, 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.     

基于场源离散化方法体内装置定位模型及验证

当前,体内微型介入式诊疗装置发展迅速,然而其在人体中的精确定位问题一直未得到很好地解决.提出了基于场源离散化方法的体内微型诊疗装置的交流激磁定位模型,从仿真和试验结果来看,本方法建立的电磁定位模型较其他定位模型相比更精确,更符合实际情况.因此,由该模型得到的体内微型装置的位置误差小,从而可以真正地满足微型诊疗装置在人体内的定位.