Subscribe Now Subscribe Today
Science Alert
 
FOLLOW US:     Facebook     Twitter
Blue
   
Curve Top
Journal of Applied Sciences
  Year: 2012 | Volume: 12 | Issue: 6 | Page No.: 518-534
DOI: 10.3923/jas.2012.518.534
Assessment of Contrast Positioning Effects on Reconstructed Images of Elliptical Models in EIT Applying Different Current Patterns
Ashkan Javaherian, Amir Movafeghi, Reza Faghihi and Effat Yahaghi

Abstract:
This study investigates the effects of contrast region positioning on reconstructed EIT images, using an elliptical model in which a contrast displaces aligned by the horizontal and vertical axes of the ellipse. Different common current-voltage patterns have been applied as well. The results obtained from the elliptical model could be applicable for estimating the anisotropy or ellipticity effects of the human body's cross-section on reconstructed EIT images. The models are defined based on two variable factors which are either the direction of the contrast movement in the ellipse, or different current-voltage patterns. The ability of the various current-voltages patterns to reconstruct images of the moving contrast as a function of contrast positioning in the models is compared. This ability has been investigated using four figures of merit which are the distinguishability of the forward models and also blur radius, artefact amplitude measure and position error of the reconstructed images. This comparison can be useful in cases in which the Region of Interest (ROI) location has been estimated before EIT measurements via either anatomical structure mapping or using other modalities such as ultrasound, MRI, etc. In addition, we show that the distinguishability measures cannot definitively be an exhaustive criterion for predicting the quality of the reconstructed images.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    An Inverse Solution for 2D Electrical Impedance Tomography Based on Electrical Properties of Material Blocks
  •    Semigroup of EEG Signals during Epileptic Seizure
  •    Relationship Between Obesity and 8-hydroxy-2-deoxy Guanosine as an Oxidative Marker in Obese Adolescents of Giza
  •    A 16-electrode Fully Integrated and Versatile CMOS Microstimulator Dedicated to Cochlear Implant
How to cite this article:

Ashkan Javaherian, Amir Movafeghi, Reza Faghihi and Effat Yahaghi, 2012. Assessment of Contrast Positioning Effects on Reconstructed Images of Elliptical Models in EIT Applying Different Current Patterns. Journal of Applied Sciences, 12: 518-534.

DOI: 10.3923/jas.2012.518.534

URL: https://scialert.net/abstract/?doi=jas.2012.518.534

 
COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

       

       

Curve Bottom