Digital Demodulation in data acquisition system for multi-frequency electrical impedance tomography

被引：0
|
作者：
Shi Xuetao [1 ]
You Fusheng [1 ]
Ji Zhenyu [1 ]
Fu Feng [1 ]
Liu Ruigang [1 ]
Dong Xiuzhen [1 ]
机构：
[1] Fourth Mil Med Univ, Sch Biomed Engn, Xian 710033, Peoples R China
来源：
2010 4TH INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL ENGINEERING (ICBBE 2010) | 2010年
关键词：
electrical impedance system; data acquisition system; demodulation;
D O I：
暂无
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
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 root 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.
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页数：3
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