脑部_____电阻抗断层成像；_等效电路；

适用于脑部电阻抗断层成像的单源驱动电流模式

http://www.100md.com 《第四军医大学学报》 2006年第3期

脑部,,电阻抗断层成像；,等效电路；,驱动模式；,脑电阻率分布,0引言,1方法,2结果,3讨论,【参考文献】

     Singlesource drive patterns for brain electrical impedance tomography

    SHI XueTao, DONG XiuZhen, SHUAI WanJun, YOU FuSheng, FU Feng, LIU RuiGang

    Department of Medical Electronic Engineering, School of Biomedical Engineering, Fourth Military Medical University, Xian 710033, China

    【Abstract】 AIM: To seek a singlesource drive pattern which is more suitable for brain electrical impedance tomography (EIT). METHODS: In accordance with the characteristics of brain resistivity distribution and data acquisition system, we compared adjacent, cross, polar and newly proposed quasipolar drive patterns of dynamic range, number of independent measurement, total marginal voltage changes and antinoise performance in an equivalent circuit model of the brain resistivity distribution consisting of 7300odd resistors. RESULTS: The quasipolar drive pattern was optimal in all aspects except the dynamic range. Polar and cross drive patterns and adjacent drive pattern followed in a descending order. CONCLUSION: The quasipolar drive pattern is the most suitable pattern for brain EIT. ......

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