scholarly journals Method of peripheral vein detection using Electrical Impedance Tomography

2021 ◽  
Vol 2008 (1) ◽  
pp. 012017
Author(s):  
M A San-Pablo-Ju´arez ◽  
D M Orozco-Corona
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Peripheral Vein ◽  
Impedance Tomography ◽  
Surface Electrodes ◽  
Current Contribution ◽  
Equal Distance ◽  
Correct Location

Abstract The aim of the current contribution was to develop a method for locating arm veins in patients by using an electrical impedance tomography. Eight surface electrodes were placed on a simulated arm, separated at a fixed and equal distance from each other. The electrodes fed information about electrical impedance (conductivity) to EIDORS software. The three main phases (veins, muscle, and bone) each have different conductivity, which the device and software convert into a colour-coded tomograph displayed on a screen. The colour for blood on the image is previously set (in this case, red), revealing the location of the veins in the selected section of the arm. A sample run was made, successfully finding the correct location and size of the modelled vein, thus demonstrating the accurate operation of the device.

scholarly journals A Local Region of Interest Imaging Method for Electrical Impedance Tomography with Internal Electrodes

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Hyeuknam Kwon ◽  
Alistair L. McEwan ◽  
Tong In Oh ◽  
Adnan Farooq ◽  
Eung Je Woo ◽  
...  
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Region Of Interest ◽  
Local Region ◽  
Imaging Method ◽  
Reconstruction Method ◽  
Impedance Tomography ◽  
Internal Electrode ◽  
Surface Electrodes ◽  
Physical Measurements

Electrical Impedance Tomography (EIT) is a very attractive functional imaging method despite the low sensitivity and resolution. The use of internal electrodes with the conventional reconstruction algorithms was not enough to enhance image resolution and accuracy in the region of interest (ROI). We propose a local ROI imaging method with internal electrodes developed from careful analysis of the sensitivity matrix that is designed to reduce the sensitivity of the voxels outside the local region and optimize the sensitivity of the voxel inside the local region. We perform numerical simulations and physical measurements to demonstrate the localized EIT imaging method. In preliminary results with multiple objects we show the benefits of using an internal electrode and the improved resolution due to the local ROI image reconstruction method. The sensitivity is further increased by allowing the surface electrodes to be unevenly spaced with a higher density of surface electrodes near the ROI. Also, we analyse how much the image quality is improved using several performance parameters for comparison. While these have not yet been studied in depth, it convincingly shows an improvement in local sensitivity in images obtained with an internal electrode in comparison to a standard reconstruction method.

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

Reconstruction of three-dimensional data for electrical impedance tomography

1992 ◽  
Vol 28 (11) ◽  
pp. 974-976 ◽  
Author(s):  
R. Gadd ◽  
F. Vinther ◽  
P.M. Record ◽  
P. Rolfe
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Three Dimensional ◽  
Impedance Tomography

scholarly journals Fast High-Precision Electrical Impedance Tomography System for Real-Time Perfusion Imaging

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 61570-61580 ◽  
Author(s):  
Weichen Li ◽  
Junying Xia ◽  
Ge Zhang ◽  
Hang Ma ◽  
Benyuan Liu ◽  
...  
Keyword(s):  
Real Time ◽  
Electrical Impedance Tomography ◽  
High Precision ◽  
Perfusion Imaging ◽  
Electrical Impedance ◽  
Impedance Tomography ◽  
Tomography System

Three-Dimensional Electrical Impedance Tomography With Multiplicative Regularization

2019 ◽  
Vol 66 (9) ◽  
pp. 2470-2480 ◽  
Author(s):  
Ke Zhang ◽  
Maokun Li ◽  
Fan Yang ◽  
Shenheng Xu ◽  
Aria Abubakar
Keyword(s):  
Electrical Impedance Tomography ◽  
Electrical Impedance ◽  
Three Dimensional ◽  
Impedance Tomography ◽  
Multiplicative Regularization
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