| Content Provider | MDPI |
|---|---|
| Author | Kusche, Roman Malhotra, Ankit Ryschka, Martin Ardelt, Gunther Klimach, Paula Kaufmann, Steffen |
| Abstract | 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. |
| File Size | 3377152 |
| Ending Page | 525 |
| Page Count | 19 |
| Starting Page | 507 |
| File Format | |
| e-ISSN | 20799292 |
| DOI | 10.3390/electronics4030507 |
| Journal | Electronics |
| Issue Number | 3 |
| Volume Number | 4 |
| Language | English |
| Publisher Date | 2015-07-29 |
| Access Restriction | Open |
| Subject Keyword | bioimpedance measurements electrical impedance tomography multi-frequency chirp signal excitation broadband impedance measurements |
| Content Type | Text |
| Resource Type | Article |
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