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Title:: Influence on Phase Detection of Magnetic Induction ?Tomography Using Insulated Container

Author(s):: YIN Yue; LIU Ruigang; Department of Medical Imaging, School of Biomedical Engineering, Fourth Military Medical University, Xi’an 710032, China

Keywords:: Magnetic induction tomography; Insulated material; Phase detection; Physical phantom; Correlation coefficient

摘要:: 研究绝缘性容器对磁感应断层成像相位检测的影响关系。使用绝缘性的有机玻璃制作容器，其内充入饱和CaSO4溶液，将其置入充入饱和CaSO4溶液的圆柱形水槽式物理模型之中，分别测量置入容器前后的磁感应相位差。选择两种尺寸的有机玻璃容器，分别进行上述实验过程。使用实心有机玻璃棒逐步浸入饱和CaSO4溶液之中，每下降1 cm测量一次磁感应相位差，绘制相位差随浸入深度的变化曲线。两种有机玻璃容器壁的体积与磁感应相位差的比例相近，相位差随浸入深度的变化曲线近似呈线性关系。绝缘性的有机玻璃容器对磁感应相位的测量值有影响，减小容器壁的体积可减轻这种影响。

Abstract:: To study the influence of insulated container wall on measured phase of magnetic induction tomography(MIT). All of the containers were made of plexiglass which was insulated material. Saturated CaSO4 solution was injected into the containers. The containers were immerged into saturated CaSO4 solution in a cylindrical tank physical phantom. The phase shifts were measured before and after containers were immerged into. Two kinds of plexiglass containers were selected and two experiments were completed respectively. On the other hand, one solid plexiglass stick was immerged into saturated CaSO4 solution. The phase shifts were measured once per 1cm. The plot of phase shift with immerged depth was drawn. The ratio of the volume of two plexiglass container walls and that of the MIT phase shifts were closed. The plot of phase shift with immerged depth was approximately linear. The insulated plexiglass container wall is able to affect the measured phase data of MIT. Reducing the volume of container wall will mitigate the effect.