Title :
Electrical characteristics of real head model based on electrical impedance tomography
Author :
Xu, Guizhi ; Yang, Qingxin ; Yang, Shuo ; Liu, Fugui ; Yan, Weili
Author_Institution :
Electr. Eng. Dept., Hebei Univ., Tiajin, China
fDate :
6/1/2004 12:00:00 AM
Abstract :
The geometry of real head has been modeled using MRI data set, and the electrical properties of head have been analyzed based on EIT using FEM method. The results show that surface potential distributions will vary with the change of conductivity inside head, and the variation will arrive at its maximum when the bone conductivity is changed. EIT system with 16 electrodes is able to reconstruct and display the approximation of the electrical conductivity of the head using the back-projection method by measuring the surface voltages of head. The data collection, processing and image reconstruction are performed using a computerized system. It is stable, convenient, in real time, and easy extendable.
Keywords :
computerised tomography; electric impedance imaging; electroencephalography; finite element analysis; mathematical analysis; neurophysiology; EIT system; FEM method; MRI data set; back-projection method; bone conductivity; computerized system; data collection; data processing; electrical characteristics; electrical conductivity; electrical impedance tomography; head conductivity; image reconstruction; real head geometry; real head model; surface potential distributions; surface voltages; Conductivity; Electric variables; Geometry; Head; Image reconstruction; Magnetic resonance imaging; Solid modeling; Surface impedance; Surface reconstruction; Tomography; Electrical impedance tomography; electrical properties; geometric modeling of real head;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.831012
