Research electrical impedance tomography system suitable for making in out of factory conditions.

The objective of this work is to present the first results of the development of an electrical impedance tomography system assembled from ready-made blocks with free software. Electrical impedance tomography is considered as a possible alternative and adjunct to computer tomography in lung diagnostics. One of the problems along this path is the mutual inaccessibility of equipment of an acceptable level for research physicians and of contacts with such physicians for the developers. An easily reproducible EIT hardware platform from ready-made modules and open source software have been developed and tested as an option for enthusiastic researchers who do not have sufficient experience to independently develop the hardware and software and the means to purchase expensive commercial devices. An evaluation board for an integrated bioimpedance meter, produced by the microcircuit manufacturer, is used to implement the main elements of the measuring system. The 16-channel multiplexers are also available as ready-made modules. A high-performance controller module based on a 32-bit system-on-chip ESP32 with built-in wireless interfaces has a compiler and SDK ported to the Arduino environment. This makes customization and testing of the embedded software possible for non-core professionals. Image reconstruction algorithms are available online on the Institute's server. Both dynamic (visualization of changes only) and static imaging are possible. The results of tomography system testing on the phantom and on the human body demonstrated the high quality of the data collected. Improving the speed of the measuring system and adding software functions, including the use of wireless interfaces for data transmission and direct interaction with the image reconstruction server are topical tasks.

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Image reconstruction algorithms for electrical impedance tomography based on swarm intelligence

Swarm Intelligence - Volume 3: Applications ◽

10.1049/pbce119h_ch2 ◽

2018 ◽

pp. 31-55

Author(s):

Wellington Pinheiro dos Santos ◽

Ricardo Emmanuel de Souza ◽

Reiga Ramalho Ribeiro ◽

Allan Rivalles Souza Feitosa ◽

ValterAugusto de Freitas Barbosa ◽

...

Keyword(s):

Image Reconstruction ◽

Swarm Intelligence ◽

Electrical Impedance Tomography ◽

Electrical Impedance ◽

Reconstruction Algorithms ◽

Impedance Tomography ◽

Image Reconstruction Algorithms

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Designing a bench for testing medically and technically an information and measuring system for multi-frequency electrical impedance tomography of human lungs

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2021.237529 ◽

2021 ◽

Vol 4 (5(112)) ◽

pp. 27-40

Author(s):

Grayr Aleksanyan

Keyword(s):

Electrical Impedance Tomography ◽

Electrical Impedance ◽

Experimental Studies ◽

Measuring System ◽

Dynamic Visualization ◽

Impedance Tomography ◽

Written Information ◽

Human Lungs ◽

Wide Range ◽

Conducting Research

This paper solves the problem of developing and creating multifunctional tools for conducting research into systems of multi-frequency electrical impedance tomography of human lungs. A test bench consisting of modern medical equipment, simulating pre-and postoperative environments to create conditions that are most similar to clinical ones, under which it is planned to operate multi-frequency electrical impedance tomography systems, was proposed and manufactured. This makes it possible to reduce significantly the time for approbation, testing, and elimination of practical inaccuracies and problems of clinical application of the developed medical and technical facilities. A positive result is achieved due to the possibility of forming new test plans with specified conditions and different levels of complexity. This enables enhancing the effectiveness of subsequent clinical tests on patients who are treated in a resuscitation unit or an intensive care unit. The operability of the bench is proved by the repeatability of obtained results of monitoring ventilation and perfusion for each examined person, the continuity of dynamic visualization of the breathing process, as well as a high degree of correlation of obtained values of differences of potentials with the readings of a bedside monitor of a patient. An information and measuring system of multi-frequency electric impedance tomography of human lungs, developed by the author earlier, was used as the EIT device. The EIT tests were performed for the frequency range of 50 kHz – 400 kHz at a current of 5 mA. All experimental studies involved volunteers who gave written information consent to participate in the tests. The results of the research show that the proposed bench can be used in practice to solve a wide range of scientific and applied problems in the field of electrical impedance tomography

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The Research Progress of Electrical Impedance Tomography for Lung Monitoring

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2021.726652 ◽

2021 ◽

Vol 9 ◽

Author(s):

Yan Shi ◽

ZhiGuo Yang ◽

Fei Xie ◽

Shuai Ren ◽

ShaoFeng Xu

Keyword(s):

Image Reconstruction ◽

Medical Imaging ◽

Early Diagnosis ◽

Electrical Impedance Tomography ◽

Electrical Impedance ◽

Research Progress ◽

Reconstruction Algorithms ◽

Impedance Tomography ◽

The Future ◽

Image Reconstruction Algorithms

Medical imaging can intuitively show people the internal structure, morphological information, and organ functions of the organism, which is one of the most important inspection methods in clinical medical diagnosis. Currently used medical imaging methods can only be applied to some diagnostic occasions after qualitative lesions have been generated, and the general imaging technology is usually accompanied by radiation and other conditions. However, electrical impedance tomography has the advantages of being noninvasive and non-radiative. EIT (Electrical Impedance Tomography) is also widely used in the early diagnosis and treatment of some diseases because of these advantages. At present, EIT is relatively mature and more and more image reconstruction algorithms are used to improve imaging resolution. Hardware technology is also developing rapidly, and the accuracy of data collection and processing is continuously improving. In terms of clinical application, EIT has also been used for pathological treatment of lungs, the brain, and the bladder. In the future, EIT has a good application prospect in the medical field, which can meet the needs of real-time, long-term monitoring and early diagnosis. Aiming at the application of EIT in the treatment of lung pathology, this article reviews the research progress of EIT, image reconstruction algorithms, hardware system design, and clinical applications used in the treatment of lung diseases. Through the research and introduction of several core components of EIT technology, it clarifies the characteristics of EIT system complexity and its solutions, provides research ideas for subsequent research, and once again verifies the broad development prospects of EIT technology in the future.

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