说明：  计算机段策成像技术在有些情况下，并不能采集到完全角度下的投影数据，利用有限角度下的投影数据进行图像重建被称为有限角度重建。本文介绍了两种有限角度CT迭代重建方法，并对重建结果进行了比较和评价
(In some cases, the computer segment imaging technology can not collect the projection data at the full angle, and the image reconstruction using the projection data in the limited angle is called the finite angle reconstruction. In this paper, two methods of CT iterative reconstruction with limited angle are introduced, and the results of reconstruction are compared and evaluated.)