摘要
目的寻求一种更适合于脑部电阻抗断层成像技术(EIT)的单源驱动模式.方法针对脑部电阻率分布的特点和数据采集系统的实际情况,在一个由7300多个电阻构成的脑部电阻率分布等效电路模型上,对比了邻近、交叉、对向和新提出的准对向这四种驱动模式在动态范围、独立测量数、边界电压变化量和抗噪性能等方面的差异.结果除动态范围外,准对向驱动模式均为最优,对向和交叉驱动模式次之,邻近模式最差.结论准对向驱动模式最适合于脑部EIT使用.
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.
出处
《第四军医大学学报》
北大核心
2006年第3期279-282,共4页
Journal of the Fourth Military Medical University
基金
国家自然科学基金重点项目(50337020)
关键词
电阻抗断层成像
等效电路
驱动模式
脑电阻率分布
electrical impedance tomography
equivalent circuit
drive pattern
brain resistivity distribution
