脑MIT单通道测量的正弦时变电磁场特性  

Characteristics of sinusoidally time-varying electromagnetic field in our single measurement channel of brain MIT

作　　者：秦明新[1] 焦李成[1] 吕华[2] 李世俊[2] 王聪[2] 董秀珍[2] 

机构地区：[1]西安电子科技大学电子工程系智能信息处理研究所,陕西西安710071 [2]第四军医大学生物医学工程系医电工程教研室,陕西西安710033

出　　处：《第四军医大学学报》2004年第23期2172-2174,共3页Journal of the Fourth Military Medical University

基　　金：全军医药卫生科研基金重点课题 (0 1Z0 78)

摘　　要：目的 :探讨脑磁感应断层成像 (MIT)单通道测量的正弦时变电磁场分布 .方法 :将头颅近似为一个双层的导电球体 ,脑MIT单通道测量系统近似为由测量、激励线圈和球体组成的轴对称模型 ,采用时谐电磁场分析方法 ,推导出轴对称模型的解析解 .结果 :获得了脑MIT单通道测量系统电磁场分布特性和求解表达式 .结论 :为脑MIT单通道测量的正弦时变电磁场的分析和计算提供了一种解析方法 .AIM: To study the distribution of the sinusoidally time-varying electromagnetic fields in our single measurement channel of magnetic induction tomography (MIT). METHODS: The head was simplified to a two-layer conductive sphere and the single measurement channel of MIT was approximated to an axial symmetric electromagnetic model. The analytical solution of the model was deduced from analysis method of time harmonic electromagnetic field. RESULTS: The distribution features and analytical expressions of our single measurement channel of MIT were obtained. CONCLUSION: The study provides an analytical method for analyzing and calculating the sinusoidally time-varying electromagnetic fields in our system.

关 键 词：脑 正弦时变电磁场 磁感应断层成像 

分 类 号：R318.3[医药卫生—生物医学工程]