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中文摘要：
射线层析成像（CT）技术由于具有非侵入性、可视化及测量精度高等特点,在工业多相流检测领域获得较广泛应用.为提高多相流CT系统重建图像的精度和速度,针对投影数据少的特点,提出基于扩充的投影矩阵计算,并以此为基础分别采用2种迭代重建算法,进行图像重建.将盲去卷积算法融入代数重建算法的迭代过程,不仅提高了收敛速度,而且减少了伪影;而同乘代数重建算法中,利用盲去卷积获得先验信息和点扩展函数,明显提高了图像质量.
英文摘要：
Owning to the advantages of non-invasiveness,visualization and high-precision,computed tomogra-phy（CT）technique is widely applied to industrial multiphase flow monitoring.Aiming to improve accuracy and con-vergence speed with limited projection data,the approach of calculating expanding projection matrix is developed,thereafter image reconstruction is implemented based on two iterative reconstruction algorithms.The blind deconvolu-tion algorithm was inserted into the iterative process of algebraic reconstruction technique（ART）,which resulted in higher speed and less artifact.While simultaneous multiplicative algebraic reconstruction technique（SMART）,by utilizing blind deconvolution algorithm to achieve prior information and point spread function（PSF）,obviously im-proves reconstructed image quality.
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