Results 331 to 340 of about 2,411,499 (365)

Multifrequency electrical impedance tomography

Clinical Physics and Physiological Measurement, 1992
Multifrequency tomography may be conveniently achieved by sequentially sweeping the probing drive current and measuring the resultant voltages at each frequency. If events change during measurement comparisons between frequencies cannot be made. Mixing several frequency components may decrease acquisition time but increase the complexity of the ...
P M, Record, R, Gadd, F, Vinther
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Dominant-Current Deep Learning Scheme for Electrical Impedance Tomography

IEEE Transactions on Biomedical Engineering, 2019
Objective: Deep learning has recently been applied to electrical impedance tomography (EIT) imaging. Nevertheless, there are still many challenges that this approach has to face, e.g., targets with sharp corners or edges cannot be well recovered when ...
Zhun Wei, Dong Liu, Xudong Chen
semanticscholar   +1 more source

Non-contact Scanning Electrical Impedance Imaging

The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2005
We are interested in applying electrical impedance imaging to a single cell because it has potential to reveal both cell anatomy and cell function. Unfortunately, classic impedance imaging techniques are not applicable to this small scale measurement due to their low resolution.
Hongze, Liu, Aaron, Hawkins, Stephen, Schultz, Travis E, Oliphant   +3 more
openaire   +3 more sources

Electrical impedance tomography

IEEE Signal Processing Magazine, 2001
Electrical impedance tomography (EIT) is an imaging modality that estimates the electrical properties at the interior of an object from measurements made on its surface. Typically, currents are injected into the object through electrodes placed on its surface, and the resulting electrode voltages are measured.
G.J. Saulnier, R.S. Blue, J.C. Newell, D. Isaacson, P.M. Edic   +4 more
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Evaluation of electrical characteristics of biological tissue with electrical impedance spectroscopy

Electrophoresis, 2019
The electrical characteristics of biological tissue is evaluated by establishing an electrical equivalent circuit with electrical impedance spectroscopy.
Jiafeng Yao, Li Wang, Kai Liu, Hongtao Wu, Hao Wang, Jinshi Huang, Jianping Li   +6 more
semanticscholar   +1 more source

Development of a Portable Electrical Impedance Tomography System for Biomedical Applications

IEEE Sensors Journal, 2018
A portable electrical impedance tomography (EIT) system has been developed with Red Pitaya STEMlab for biomedical applications. The Red Pitaya STEMlab is a portable device to realize voltage generation and data acquisition for the EIT system.
Zifei Xu, Jiafeng Yao, Zheng Wang, Yanli Liu, Hao Wang, Bai Chen, Hongtao Wu   +6 more
semanticscholar   +1 more source

High-Precision Electrical Impedance Tomography Data Acquisition System for Brain Imaging

IEEE Sensors Journal, 2018
In electrical impedance tomography (EIT), it is difficult to obtain the intracranial impedance due to the highly resistive skull enclosing the brain. Therefore, a high-precision data acquisition system is required for brain EIT.
Xuetao Shi, Weichen Li, Fusheng You, Xuyang Huo, Canhua Xu, Zhenyu Ji, Ruigang Liu, Benyuan Liu, Yandong Li, F. Fu, Xiuzhen Dong   +10 more
semanticscholar   +1 more source

Electrical Impedance Tomography

2017
Presently, non-invasive techniques are in vogue and preferred standard clinical approach because of its limitless advantages in monitoring real time phenomenon occurring within our human body without much interference. Many techniques such as ultrasound, magnetocardiography, CT scan, MRI etc., are used for real time monitoring but are generally not ...
Ramesh Kumar Meena, Sarwan Kumar Pahuja, Abdullah Bin Queyam, Amit Sengupta   +3 more
openaire   +2 more sources

Electrical impedance tomography

Inverse Problems, 2002
Updated (up to 2002, 153 references) theoretical and numerical studies of the inverse problem for the continuum model of EIT which seeks the admittivity \((\gamma(x)= \sigma(x)+ i\omega\varepsilon(x))\) inside a body \(\Omega\) from the knowledge of the Dirichlet to Neumann (DtN) (or the Neumann to Dirichlet (NtD)) map at the boundary \(\partial\Omega\)
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Electrical Impedance Spectroscopy

2018
This chapter gives some background on impedance spectroscopy and tissue impedance but also about the instrumentation used for measuring transfer impedance of a biological material under study. The instrumentation concerned here is the current source for applying a current to tissue and the differential amplifier for measuring the resultant voltage.
openaire   +1 more source