期刊论文详细信息
Electronics
A FPGA-Based Broadband EIT System for Complex Bioimpedance Measurements—Design and Performance Estimation
Roman Kusche1  Ankit Malhotra1  Martin Ryschka1  Gunther Ardelt2  Paula Klimach1  Steffen Kaufmann1 
[1] Laboratory of Medical Electronics (LME), Lübeck University of Applied Sciences, 23562 Lübeck, Germany; E-Mails:;Center of Excellence CoSA (Communications—Systems—Applications), Lübeck University of Applied Sciences, 23562 Lübeck, Germany; E-Mail:
关键词: bioimpedance measurements;    electrical impedance tomography;    multi-frequency;    chirp signal excitation;    broadband impedance measurements;   
DOI  :  10.3390/electronics4030507
来源: mdpi
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【 摘 要 】

Electrical impedance tomography (EIT) is an imaging method that is able to estimate the electrical conductivity distribution of living tissue. This work presents a field programmable gate array (FPGA)-based multi-frequency EIT system for complex, time-resolved bioimpedance measurements. The system has the capability to work with measurement setups with up to 16 current electrodes and 16 voltage electrodes. The excitation current has a range of about 10 µA to 5 mA, whereas the sinusoidal signal used for excitation can have a frequency of up to 500 kHz. Additionally, the usage of a chirp or rectangular signal excitation is possible. Furthermore, the described system has a sample rate of up to 3480 impedance spectra per second (ISPS). The performance of the EIT system is demonstrated with a resistor-based phantom and tank phantoms. Additionally, first measurements taken from the human thorax during a breathing cycle are presented.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.

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