A 128-electrode three dimensional electrical impedance tomography system.
Electrical impedance tomography (EIT) is a new functional imaging technique. This paper presents the development of a new electrical impedance tomography system with 128 electrodes for impedance change detection and 3D imaging of the human thorax. The system consists of several modules, including multi-frequency current source, driving, measuring, data acquisition, and controlling and signal processing modules. A high speed digital signal processor (DSP) is used as the controller. The 64 driving electrodes and 64 measuring electrodes are positioned uniformly in four planes around the surface of a cylindrical phantom filled with a saline solution and objects of varying conductivities. The performance has been tested, and these preliminary experiments demonstrate the feasibility this system.
Xu
Guizhi
G
Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, P.R.China. gzxu@hebut.edu.cn
Wang
Renping
R
Zhang
Shuai
S
Yang
Shuo
S
Justin
Gusphyl A
GA
Sun
Mingui
M
Yan
Weili
W
D017097:Electric Impedance; D004566:Electrodes; D021621:Imaging, Three-Dimensional; D012815:Signal Processing, Computer-Assisted; D014054:Tomography / Q000295:instrumentation* / Q000379:methods*