The Research Progress of Electrical Impedance Tomography for Lung Monitoring

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

Journal of Radio Electronics ◽

10.30898/1684-1719.2021.9.5 ◽

2021 ◽

Vol 2021 (9) ◽

Author(s):

A.V. Korjenevsky ◽

Keyword(s):

Image Reconstruction ◽

Electrical Impedance Tomography ◽

Electrical Impedance ◽

Direct Interaction ◽

Measuring System ◽

Dynamic Visualization ◽

Reconstruction Algorithms ◽

Impedance Tomography ◽

Tomography System ◽

Wireless Interfaces

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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Survey on Medical Imaging of Electrical Impedance Tomography (EIT) by Variable Current Pattern Methods

Journal of ISMAC - June 2019 ◽

10.36548/jismac.2021.2.002 ◽

2021 ◽

Vol 2 (2) ◽

pp. 82-95

Author(s):

Edriss Eisa Babikir Adam ◽

Sathesh

Keyword(s):

Image Reconstruction ◽

Medical Imaging ◽

Electrical Impedance Tomography ◽

Electrical Impedance ◽

Optical Tomography ◽

Assessment Process ◽

Current Direction ◽

Impedance Tomography ◽

Research Article ◽

Reconstruction Methods

Recently, the image reconstruction study on EIT plays a vital role in the medical application field for validation and calibration purpose. This research article analyzes the different types of reconstruction algorithms of EIT in medical imaging applications. Besides, it reviews many methods involved in constructing the electrical impedance tomography. The spatial distribution and resolution with different sensitivity has been discussed here. The electrode arrangement of various methods involved in the EIT system is discussed here. This research article comprises of adjacent drive method, cross method, and alternative opposite current direction method based on the voltage driven pattern. The assessment process of biomedical EIT has been discussed and investigated through the impedance imaging of the existent substances. The locality of the electrodes can be calculated and fixed for appropriate methods. More specifically, this research article discusses about the EIT image reconstruction methods and the significance of the alternative opposite current direction approach in the biomedical system. The change in conductivity test is further investigated based on the injection of current flow in the system. It has been established by the use of Electrical Impedance Tomography and Diffuse Optical Tomography Reconstruction Software (EDITORS) software, which is open-source software.

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