A 128-Electrode Three Dimensional Electrical Impedance Tomography System

Author

Guizhi Xu ; Renping Wang ; Shuai Zhang ; Shuo Yang ; Justin, G.A. ; Mingui Sun ; Weili Yan

Author_Institution

Hebei Univ. of Technol., Tianjin

fYear

2007

fDate

22-26 Aug. 2007

Firstpage

4386

Lastpage

4389

Abstract

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.

Keywords

bioelectric phenomena; biomedical electrodes; biomedical imaging; electric impedance imaging; medical signal processing; tomography; 3D electrical impedance tomography; biomedical electrode; controller; data acquisition module; digital signal processor; driving electrodes; human thorax; impedance change detection; measuring electrodes; multifrequency current source; Control systems; Current measurement; Data acquisition; Electrodes; Humans; Impedance; Process control; Signal processing; Thorax; Tomography; Electric Impedance; Electrodes; Imaging, Three-Dimensional; Signal Processing, Computer-Assisted; Tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE

Conference_Location

Lyon

ISSN

1557-170X

Print_ISBN

978-1-4244-0787-3

Type

conf

DOI

10.1109/IEMBS.2007.4353310

Filename

4353310