3D ECT image reconstruction by iterative method with threshold filtering
YAN Hua
XU Xin
SUN Yan-hui
WANG Yi-fan
Abstract：To solve the problem of requiring many times of iterations and containing a lot of artifacts in the reconstructed images when the Landweber iteration algorithm is used for 3D ECT reconstruction,an iterative reconstruction method with threshold filtering was proposed.An initial image was reconstructed with the Landweber iteration algorithm,and an improved image was obtained by means of threshold filtering.In order to obtain an optimum threshold,the initial image was successively binarized with a limited amount of discretized thresholds. In addition, the errors between the corresponding estimated and measured capacitances of binarized image were calculated,and the threshold with the minimum error was chosen as the optimum threshold.The simulated results show that the adaptive threshold filtering can obviously reduce the reconstruction time and artifacts in the reconstructed images.As a result,the proposed method has a good application potential.
Keywords：electrical capacitance tomography (ECT)three-dimensional reconstructionreconstruction algorithmadaptive thresholdartifact inhibition3D ECTLandweber iterationthreshold filtering
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 671-675 )