title: Electrical impedance tomography reconstruction algorithm based on general inversion theory and finite element method.
abstract: A strict EIT reconstruction algorithm, the general inversion algorithm (GIA) is presented. To improve the noise performance, the algorithm is modified by attenuating the condition number of the forward matrix F and implemented using an improved FEM scheme, to obtain the 2D image of impedance change (dynamic image). This modified general inversion algorithm (MGIA) can be used on a larger dimension FEM model (248 elements) and is more practical than the GIA. When implementing this algorithm in computer simulation and in a physical phantom, it is found that the MGIA has a smaller reconstruction error than the currently used algorithms (equipotential-back-projection algorithm and filtered spectral expansion algorithm). With 0.1% white noise in the data, the algorithm can still reconstruct images of a complicated model. Further improvements are also discussed.
authors: Biomedical Engineering Department, Fourth Military Medical University, Xian, Shaanxi, People's Republic of China. bmee@fmmu.edu.cn
authors: T
authors: T
authors: Mengxing
authors: D
authors: D
authors: Xiuzhen
authors: Q
authors: Q
authors: Mingxin
authors: F
authors: F
authors: Feng
authors: S
authors: S
authors: Xuetao
authors: Y
authors: Y
authors: Fusheng
mesh_terms: D000465:Algorithms; D017097:Electric Impedance; D020342:Finite Element Analysis; D006801:Humans; D014054:Tomography / Q000379:methods*