scholarly journals THE DEVELOPMENT USER’S INTERFACE OF INFORMATION-MEASURING SYSTEM OF MULTI-ANGLE ELECTRICAL IMPEDANCE TOMOGRAPHY

2020 ◽  
pp. 5-9
Author(s):  
G.K. Aleksanyan ◽  
I.D. Shcherbakov ◽  
A.V. Sulyz ◽  
M.A. Priyma
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Measuring System ◽  
Impedance Tomography ◽  
Information Measuring ◽  
Information Measuring System

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

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.

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

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

Simulation of effects of the electrode structure and material in the density measuring system of the peripheral nerve based on micro-electrical impedance tomography

2018 ◽  
Vol 63 (2) ◽  
pp. 151-161 ◽  
Author(s):  
Saber Behkami ◽  
Javad Frounchi ◽  
Firouz Ghaderi Pakdel ◽  
Thomas Stieglitz
Keyword(s):  
Image Quality ◽  
Peripheral Nerve ◽  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Density Measurement ◽  
Measuring System ◽  
Reconstructed Image ◽  
Electrode Structure ◽  
Impedance Tomography ◽  
The Real

AbstractThe electrode structure in micro-electrical impedance tomography (MEIT) highly influences the measurement sensitivity and therefore the reconstructed image quality. Hence, optimizing the electrode structure leads to the improvement of image quality in the reconstruction procedure. Although there have been many investigations on electrical impedance tomography (EIT) electrodes, there is no comprehensive study on their influence on images of the peripheral nerve. In this paper, we present a simulation method to study the effects of the electrode structure in the density measurement system of the peripheral nerve based on MEIT. The influence of the electrode structure such as dimensions, material and the number of electrodes and also the recognition feature of different radii of fascicle and different locations of fascicles has been studied. Data were reconstructed from the real and imaginary parts of complex conductivity data, respectively. It has been shown that the material of the electrodes had no effect on the reconstructed images, while the dimensions of the electrodes significantly affected the image sensitivity and thus the image quality. An increase in the number of electrodes increased the amount of data and information content. However, as the number of electrodes increased due to the given perimeter of the peripheral nerve, the area of the electrodes was reduced. This reduction affects the reconstructed image quality. The real and imaginary parts of the data were separately reconstructed for each case. Although, in real EIT systems, the reconstructed images using the real part of the signal have a better signal-to-noise ratio (SNR), this study proved that for a density measuring system of the peripheral nerve, the reconstructed images using the imaginary part of the signal had better quality. This simulation study proposes the effects of the electrode size and material and obtained spatial resolution that was high enough to reconstruct fascicles in a peripheral nerve.

scholarly journals MONITORING DAMAGE AND DAMPNESS IN FLOOD EMBANKMENT BY ELECTRICAL IMPEDANCE TOMOGRAPHY

2017 ◽  
Vol 7 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Tomasz Rymarczyk ◽  
Przemysław Adamkiewicz
Keyword(s):  
Finite Element Method ◽  
Inverse Problem ◽  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Model System ◽  
Measuring System ◽  
Basic Information ◽  
Newton Methods ◽  
The Finite Element Method ◽  
Impedance Tomography

The article presents a model of the measuring system for image reconstruction. Electrical impedance tomography was used to determine the moisture of the test flood blank on a specially built model. The Gauss-Newton methods have been applied very successfully in many areas of the scientific modelling. The basic information about the built model system is given. The finite element method was used to solve the forward problem. The level set method and the Gauss-Newton method were applied to solve the inverse problem.

CALIBRATION OF A LOW COST ELECTRICAL IMPEDANCE TOMOGRAPHY SYSTEM WITH A RING OF RESISTORS AND A KCL SOLUTION

2019 ◽  
Author(s):  
Bruno Furtado de Moura ◽  
francisco sepulveda ◽  
Jorge Luis Jorge Acevedo ◽  
Wellington Betencurte da Silva ◽  
Rogerio Ramos ◽  
...  
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Low Cost ◽  
Impedance Tomography ◽  
Tomography System
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