The disadvantages of art algorithm are that it can not realize with hardware and the reconstruction speed is slowly 代数重建法的最大缺点是重建速度较慢,不能用硬件实现。
In this paper , two novel algorithms of reconstructing high resolution images from both overlapped parallel projection data and overlapped fan beam projection data with low resolution are presented . one is called virtual detector algorithm , and the other is direct reconstruction algorithm . both of the algorithms with two forms for the parallel data and fan beam data respectively are developed based on the interpolative algebraic reconstruction techniques ( iart ) 本文在研究插值代数重建法( iart )的基础上,根据特别设计的数据采集模式(平行相叠采样和扇形相叠采样) ,提出了由相叠低分辨数据重建高分辨图像的两个新算法,即虚拟探测器法和直接重建法。