Title :
Quasi-polar drive pattern for brain electrical impedance tomography
Author :
Xuetao, Shi ; Xiuzhen, Dong ; Wangjun, Shuai ; Fusheng, You ; Feng, Fu ; Ruigang, Liu
Author_Institution :
Dept. of Med. Electron. Eng., Fourth Mil. Med. Univ.
Abstract :
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
Keywords :
bioelectric potentials; brain; electric impedance imaging; antinoise performance; boundary voltages dynamic range; brain electrical impedance tomography; brain resistivity distribution; equivalent circuit; independent measurement number; quasipolar drive pattern; single source drive pattern; total boundary voltage changes; Biomedical imaging; Conductivity; Data acquisition; Drives; Dynamic range; Electrodes; Image reconstruction; Surface impedance; Tomography; Voltage; brain resistivity distribution; drive pattern; electrical impedance tomography;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1617014
