[Implementing a relatively rigorous algorithm of dynamic EIT problem on the modified FEM model].
We deduced a relatively rigorous algorithm of dynamic EIT problem-general inverse algorithm, and implemented it on the computer FEM model. Images which can show the changing of the resistivity(i.e. dynamic resistivity images) were gained. Also we modified the ordinary FEM model according to the characteristic of the EIT problem and implemented the general inverse algorithm on the modified model. The ill-posed condition of the forward matrix based on the modified model was fairly improved. It can be seen from the results that the general inverse algorithm with modified FEM model is an algorithm better than the back-projection algorithm in terms of object locating, image definition, and the ability of dealing with complex object and noise.
Tang
M
M
Bio-Medical Engineering Dept, Fourth Military Medical University, Xi'an 710032.
Dong
X
X
Qin
M
M
Wang
Z
Z
Fu
F
F
Shi
X
X
D000465:Algorithms; D017097:Electric Impedance; D020342:Finite Element Analysis; D007091:Image Processing, Computer-Assisted / Q000379:methods*