磁感应断层成像的双向检测优化方法研究  

Research on optimization method of bidirectional detection in magnetic induction tomography

作　　者：陈瑞娟[1,2] 赵松松 李丹丹[3] 王慧泉[1,2] 韦然[1] Chen Ruijuan;Zhao Songsong;Li Dandan;Wang Huiquan;Wei Ran(School of Life Science,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems,Tlangong University,Tianjin 300387,China;School of Electrical and Electronic Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学生命科学学院,天津300387 [2]天津工业大学天津市光电检测技术与系统重点实验室,天津300387 [3]天津工业大学电气与电子工程学院,天津300387

出　　处：《仪器仪表学报》2021年第11期182-189,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(81901789);天津市企业科技特派员项目(20YDTPJC00570);天津市教委科研计划项目(2019KJ023);天津市科技计划项目(18ZXRHSY00200)资助。

摘　　要：磁感应断层成像作为一种新的检测成像技术,在脑出血等疾病的临床诊断和连续检测中具有重要的应用价值。磁感应断层成像系统由激励线圈和检测线圈两种线圈组成,其中激励线圈只有一个,而检测线圈在以往的研究中多达十几个甚至几十个。由于空间限制以及线圈之间的相互干扰,如何在不损失成像准确度的情况下最大程度减少线圈的个数具有重要的研究意义。针对此问题,本文提出了仅使用5个检测线圈,分别检测两个相互垂直方向磁场信息的双向检测成像方法。进行了含有半径为15 mm的单个异质体和半径分别为7和15 mm的两个异质体的复杂头部模型仿真实验和异质体检测的仿体实验,结果均表明双向检测成像方式不仅可以抵消检测线圈个数减少带来的影响,而且具有更高的抗噪性能和成像准确度,从而为推动MIT的实际应用奠定了技术基础。Magnetic induction tomography,as a new detection imaging technology,has important application value in clinical diagnosis and continuous monitoring of cerebral hemorrhage and other diseases.MIT system consists of excitation coil and detection coils,among which there is only one excitation coil,while there are dozen or even dozens of detection coils in previous studies.Due to space limitations and interference between coils,it has important significance to study how to minimize the number of coils without losing imaging accuracy.Aiming at this problem,this paper proposes a bidirectional detection imaging way using only five detection coils to detect magnetic field information in each other′s vertical direction.The complex head model simulation experiments and heterogeneous detection experiments on a single heterogeneous body with radius of 15 mm and two heterogeneous bodies with radius of 7 and 15 mm were carried out,respectively,and the results show that the bidirectional detection imaging way can not only counteract the effect of reducing the number of detection coils,but also have high noise resistance performance and imaging accuracy,which lays a technical foundation for the practical application of MIT.

关 键 词：磁感应断层成像 检测线圈 激励线圈 双向检测 异质体 

分 类 号：R318[医药卫生—生物医学工程] TH701[医药卫生—基础医学]