Three-axis magneto-impedance effect sensor system for detecting position and orientation of catheter tip
Three-axis magneto-impedance effect sensor system for detecting position and orientation of catheter tip
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DOI：
10.1016/j.sna.2003.11.018
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发表时间：
2004-03
影响因子：
4.6
通讯作者：
K. Totsu;Y. Haga;M. Esashi
中科院分区：
文献类型：
--
作者：
K. Totsu;Y. Haga;M. Esashi
基于导管的微创治疗需要导管尖端的位置和方向的实时信息，以确保安全操作。为了减少x射线暴露并为操作人员提供三维信息，提出了一种简单的传感器系统，该系统利用地球磁场和由双轴源线圈传输的交流（10kHz）磁场来检测位置和方向。在导管尖端安装一个直径为×2 mm ×3 mm的三轴磁阻抗传感器（MI），用于测量地磁场和交流磁场。该传感器的优点是：(1)体积小；(2)灵敏度高；(3)通孔的保留。计算导管尖端的位置和方向，并将得到的导管尖端的位置和方向信息叠加在预先捕获的血管三维地图上。在血管模型中进行测量，并将计算得到的位置和方向图像叠加在血管的三维图形图像上。传感器系统在“y”形血管模型中明显显示导管尖端的位置。
A catheter-based minimally invasive therapy requires real time information about the position and orientation of a catheter tip for safe operation. To decrease X-ray exposure and to provide 3D information for operators, a simple sensor system for detecting the position and orientation utilizing the earth’s magnetic field and ac (10kHz) magnetic field transmitted by a two-axis source coil is proposed. A 2 mm ×2 mm ×3 mm three-axis MI sensor (Magneto-Impedance effect sensor) fabricated on a polymer structure for measuring the earth’s magnetic field and the ac magnetic field is mounted on the catheter tip. The advantages of this sensor are: (1) small size; (2) high sensitivity; (3) retaining of through hole. The position and orientation is calculated and the obtained information of the position and orientation of the catheter tip is superimposed on the 3D map of the blood vessel captured in advance. A measurement in a blood vessel model has been performed and the calculated position and orientation image has been superimposed on the 3D graphic image of the blood vessel. The sensor system obviously indicated where the catheter tip was in the “y” shape blood vessel model.