Ke Li, Ling Zhi, Du Qiang, Hei Jichang
Institute of Biomedical and Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2013 Feb;30(1):1-5.
Magnetic induction tomography (MIT) is a kind of novel imaging method. In this system, exciting coil directly affects the detection range and detection sensitivity. In order to improve eddy current inductive region magnetic field distribution, we established a 3D four layers homocentric sphere head model in this study. Then we carried out a 3D three dimensional transient finite element calculation in different coil radius, turns and line diameter of the exciting coil of MIT system. Then we analyzed the axial magnetic flux density of the eddy current inductive area and detected the coil induced voltage. The research results showed that the increased magnetic flux density, the augmented detection range and the improved detection sensitivity were all realized by enlarging radius, increasing line diameter and reducing turns.
磁感应断层成像（MIT）是一种新型成像方法。在该系统中，激励线圈直接影响检测范围和检测灵敏度。为了改善涡流感应区域的磁场分布，本研究建立了一个三维四层同心球头模型。然后，针对MIT系统激励线圈的不同线圈半径、匝数和线径进行了三维瞬态有限元计算。接着分析了涡流感应区域的轴向磁通密度，并检测了线圈感应电压。研究结果表明，通过增大半径、增加线径和减少匝数，实现了磁通密度的增加、检测范围的扩大和检测灵敏度的提高。
