Prior-online iteration for image reconstruction with electrical capacitance tomography

S. Liu, L. Fu, W.Q. Yang, H.G. Wang, F. Jiang

    Research output: Contribution to journalArticlepeer-review


    Electrical capacitance tomography (ECT) has been developed for imaging dielectric material distributions. While iterative image reconstruction algorithms may produce high-quality images, they are regarded as being time-consuming and currently can only be used offline. This paper describes a new image reconstruction algorithm for ECT. First, a coefficient matrix is generated through an offline iteration process. The matrix is then used for online image reconstruction in the same way as a sensitivity map is used in the popular linear back-projection (LBP) algorithm. This new algorithm can produce similar quality images to the Landweber iteration algorithm, but at the same speed as the LBP. An optimal step-length has been incorporated into the new algorithm for improved convergence. The algorithm has been evaluated by both simulation and experiment.
    Original languageEnglish
    Pages (from-to)195–200
    Number of pages6
    JournalIEE Proceedings: Science, Measurement and Technology
    Issue number3
    Publication statusPublished - May 2004


    • matrix algebra
    • capacitance
    • iterative methods
    • image reconstruction
    • computerised tomography
    • dielectric materials


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