A FPGA-Based Broadband EIT System for Complex Bioimpedance Measurements-Design and Performance Estimation

被引：27
|
作者：
Kusche, Roman [1 ,2 ]
Malhotra, Ankit [1 ,3 ]
Ryschka, Martin [1 ]
Ardelt, Gunther [4 ]
Klimach, Paula [1 ,2 ]
Kaufmann, Steffen [1 ,3 ]
机构：
[1] Lubeck Univ Appl Sci, Lab Med Elect, D-23562 Lubeck, Germany
[2] Univ Lubeck, Grad Sch Comp Med & Life Sci, D-23562 Lubeck, Germany
[3] Univ Lubeck, Inst Med Engn, D-23562 Lubeck, Germany
[4] Lubeck Univ Appl Sci, Ctr Excellence CoSA Commun Syst Applicat, D-23562 Lubeck, Germany
来源：
ELECTRONICS | 2015年 / 4卷 / 03期
关键词：
bioimpedance measurements; electrical impedance tomography; multi-frequency; chirp signal excitation; broadband impedance measurements; ELECTRICAL-IMPEDANCE TOMOGRAPHY; BREAST-CANCER DETECTION; SPECTROSCOPY; LUNG;
D O I：
10.3390/electronics4030507
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
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 mu A 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.
引用
收藏
页码：507 / 525
页数：19
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