Practical design of low-cost instrumentation for industrial electrical impedance tomography (EIT)

Khalighi, Mohammad Mehdi; Vahdat, Bijan Vosoughi; Mortazavi, Mohammad; Hy, Wei; Soleimani, Masoud

doi:10.1109/i2mtc.2012.6229173

Cited by 28 publications

(24 citation statements)

References 2 publications

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“…The EIT prototypes proposed by the scientific community are integrated with analog components and control devices [97], especially used in the processes of signal generation, measurement and processing. This is how proposals are based on FPGA [5], [34], [36], [98], [99], DSP [91], [100] and Microcontrollers [39], [40], which present modular architectures. Although they have sufficient characteristics for particular medical applications, these proposals have limitations such as the calibration of the modules for generating sinusoidal signals, reconfiguration of injection patterns and measurement of signals, which may require a hardware reconfiguration [101], [102].…”

Section: Discussionmentioning

confidence: 99%

Electrical Impedance Tomography: Hardware Fundamentals And Medical Applications

Revelo

2020

ing. Solidar

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Introduction: The following article shows a systematic review of publications on hardware topologies used to capture and process electrical signals used in Electrical Impedance Tomography (EIT) in medical applications, as well topicality of the EIT in the field of biomedicine. This work is the product of the research project “Electrical impedance tomography based on mixed signal devices”, which took place at the University of Cauca during the period 2017-2019. Objective: This review describes the operation, topicality and clinical use of Electrical Impedance Tomography systems. Methodology: A systematic review was carried out in the IEEE-Xplore, ScienceDirect and Scopus databases. After the classification, 106 relevant articles were obtained on scientific studies of EIT systems; applications dedicated to the analysis of medical images. Conclusions: Impedance-based methods have a variety of medical applications as they allow for the reconstruction of a body region, by estimating the conductivity distribution inside the human body; this is without exposing the patient to the damaging effects of radiation and contrast elements. Impedance-based methods are therefore a very useful and versatile tool in the treatment of diseases such as: monitoring blood pressure, detection of atherosclerosis, localization of intracranial hemorrhages, determining bone density, among others. Originality: It describes the necessary components to design an EIT system, as well as the design characteristics depending on the pathology to be visualized. Restrictions: The review focuses on aspects of the performance of an EIT system, depending on the pathology analyzed. Considering the hardware advances, it is possible to increase the acquisition speed (temporal resolution), thus improving the spatial resolution and the quality of the reconstructed image. Introduction: The following article shows a systematic review of publications on hardware topologies used to capture and process electrical signals used in Electrical Impedance Tomography (EIT) in medical applications, as well topicality of the EIT in the field of biomedicine. This work is the product of the research project “Electrical impedance tomography based on mixed signal devices”, which took place at the University of Cauca during the period 2017-2019. Objective: This review describes the operation, topicality and clinical use of Electrical Impedance Tomography systems. Methodology: A systematic review was carried out in the IEEE-Xplore, ScienceDirect and Scopus databases. After the classification, 106 relevant articles were obtained on scientific studies of EIT systems; applications dedicated to the analysis of medical images. Conclusions: Impedance-based methods have a variety of medical applications as they allow for the reconstruction of a body region, by estimating the conductivity distribution inside the human body; this is without exposing the patient to the damaging effects of radiation and contrast elements. Impedance-based methods are therefore a very useful and versatile tool in the treatment of diseases such as: monitoring blood pressure, detection of atherosclerosis, localization of intracranial hemorrhages, determining bone density, among others. Originality: It describes the necessary components to design an EIT system, as well as the design characteristics depending on the pathology to be visualized. Restrictions: The review focuses on aspects of the performance of an EIT system, depending on the pathology analyzed. Considering the hardware advances, it is possible to increase the acquisition speed (temporal resolution), thus improving the spatial resolution and the quality of the reconstructed image.

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Section: Discussionmentioning

confidence: 99%

Electrical Impedance Tomography: Hardware Fundamentals And Medical Applications

Revelo

2020

ing. Solidar

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“…3.1) injects a constant amplitude, low frequency sinusoidal current electrical current through the driving electrodes and the boundary voltages are measured on the sensing electrodes with four electrode method [28,209] using an electronic instrumentation [13,14,20,25,32,125,164,176]. For a current injection through a particular current electrode pair, the boundary voltage current data are collected from all voltage electrode pairs excluding the pairs containing one or two current electrodes.…”

Section: Electrical Impedance Tomography (Eit)mentioning

confidence: 99%

Noninvasive Electromagnetic Methods for Brain Monitoring: A Technical Review

Bera

2014

Brain-Computer Interfaces

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“…The quality of the reconstructed images is also good. [1] Z. Zhou et.al proposed a telemedicine system based on EIT which is fast and portable. The proposed system can be used for monitoring the health status of out-of-hospital patients.…”

Section: Related Workmentioning

confidence: 99%

Design and development of Electrical Impedance Tomography (EIT) based System

Garg¹,

Goel²

2013

IJCA

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Electrical Impedance Tomography (EIT) is relatively a new imaging technique with which the images of the internal impedance of the region of interest in human body can be constructed effectively without prolonged exposure to radiations. EIT is fast, inexpensive and portable as compared to other imaging techniques. The presented work focuses on construction of human organ images acquired from impedance graph of the organ under diagnosis. In the presented work, upper arm part has been brought under EIT electrodes system network in order to get the impedance measurement using the proposed circuit. The impedance is measured by using a resistive network and tabulated in an array. The impedance array is then analyzed in MATLAB to construct the image of the particular organ. The main emphasis is given on stability of the impedance of the particular parts under different strain conditions. . General Terms

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Practical design of low-cost instrumentation for industrial electrical impedance tomography (EIT)

Cited by 28 publications

References 2 publications

Electrical Impedance Tomography: Hardware Fundamentals And Medical Applications

Electrical Impedance Tomography: Hardware Fundamentals And Medical Applications

Noninvasive Electromagnetic Methods for Brain Monitoring: A Technical Review

Design and development of Electrical Impedance Tomography (EIT) based System

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