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.

引用

页数：3

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