Title :
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
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;
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
DOI :
10.1109/ICBBE.2010.5515359
