一种基于数据外插改进的ART迭代算法

Base on Date Extraplation Improve ART Iterations Algorithm

本文针对有限角度的投影数据的CT图像重建问题,提出了一种基于数据外插改进的ART算法。该算法的基本思想是运用已知角度的投影数据来补全未知角度的投影数据,再用ART算法进行图像重建。最后用模拟的投影数据进行了重建图像的数值实验。实验结果表明该算法不但提高了重建图像质量,同时也提高了图像迭代的收敛速度。

In order to reconstruct high-quality image from projection data at limited angle,we develop an improved fast iterative reconstruction algorithm. The basic idea of this algorithm is that used the perspective of data to complete unknown perspective projection data is applied,and the image can be made by Algebraic Reconstruction Technique（ART） . In the end,we have performed numerical experiments using computer simulation data. Experimental results demonstrate that the proposed algorithm not only improves the quality of image reconstructed,but also significantly increases the convergence speed of iteration image.