Magnetic Marker Localization System Using a Super-Low-Frequency Signal
Magnetic Marker Localization System Using a Super-Low-Frequency Signal
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DOI：
10.1109/tmag.2014.2331370
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发表时间：
2014-12
影响因子：
2.1
通讯作者：
D. Oyama;Y. Adachi;M. Higuchi;G. Uehara
中科院分区：
文献类型：
--
作者：
D. Oyama;Y. Adachi;M. Higuchi;G. Uehara
在本文中，磁标记定位系统使用超低频信号-约100赫兹-提出了一种手术导航系统。该方法避免了金属手术工具内部流动的涡电流的影响。模拟了涡流引起的磁场畸变和定位误差的频率依赖性，以确定最佳信号频率。从模拟的结果来看，涡流对磁标记定位的影响在1 kHz以下可以是微不足道的。原型系统使用94和143 Hz的标记信号，包括16通道磁通门磁力计。标记成功地定位，即使在观察区有金属工具，开发的系统也可以运行。
In this paper, a magnetic marker localization system using a super-low-frequency signal-around 100 Hz-is proposed for a surgical navigation system. This method avoids the effect of eddy currents flowing inside metallic surgical tools. The frequency dependence of the magnetic field distortion and localization error due to eddy currents were simulated to determine the optimum signal frequency. From the results of the simulation, the influence of eddy currents on the magnetic marker localization can be insignificant below 1 kHz. The prototype system used marker signals at 94 and 143 Hz and comprised 16-channel fluxgate magnetometers. Markers were successfully localized and the developed system was operational even though metal tools were present in the observation area.