Digital Demodulation in Data Acquisition System for Multi-Frequency Electrical Impedance Tomography

Author

Shi Xuetao ; You Fusheng ; Ji Zhenyu ; Fu Feng ; Liu Ruigang ; Dong Xiuzhen

Author_Institution

Sch. of Biomed. Eng., Fourth Mil. Med. Univ., Xi´an, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

3

Abstract

In order to extract the impedance information at different frequencies in our multi-frequency electrical impedance tomography (EIT) system, a digital demodulation method was employed. Theoretically, this method can improve the SNR by √(N/2) times, if we sampling N point per period. Moreover, as very little system resources been needed in this method, all the calculating operations can be finished in a single Field Programmable Gate Arrays (FPGA) device instead of in a personal computer. And the final data acquisition system based on this method was established and the preliminary imaging results were obtained.

Keywords

demodulation; electric impedance imaging; field programmable gate arrays; medical image processing; data acquisition system; digital demodulation; field programmable gate arrays; multi-frequency electrical impedance tomography; personal computer; Biological tissues; Data acquisition; Data mining; Demodulation; Equations; Field programmable gate arrays; Frequency; Impedance; Sampling methods; Tomography;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on

Conference_Location

Chengdu

ISSN

2151-7614

Print_ISBN

978-1-4244-4712-1

Electronic_ISBN

2151-7614

Type

conf

DOI

10.1109/ICBBE.2010.5515359

Filename

5515359