Quasi-polar drive pattern for brain electrical impedance tomography.
To seek a single source drive pattern that is more suitable for brain electrical impedance tomography (EIT), a comparison between adjacent, cross, polar and newly proposed quasi-polar drive patterns was made in aspects of boundary voltages dynamic range, independent measurement number, Total boundary voltage changes and anti-noise performance based on an equivalent circuit of the brain resistivity distribution consisting of 7300-odd resistors. The results demonstrate that quasi-polar drive pattern is optimal in all the aspects except dynamic range. Polar and cross drive patterns come next, and adjacent drive pattern is the worst. Therefore, the quasi-polar drive pattern should be chosen for brain EIT.
Xuetao
Shi
S
Medical Electronic Engineering Department, Fourth Military Medical University, Xi'an, 710033, China.
Wangjun
Shuai
S
Fusheng
You
Y
Feng
Fu
F
Ruigang
Liu
L
Xiuzhen
Dong
D