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Fast image reconstruction for cone-beam ART based on minimal reconstruction region
Author(s): 
Pages: 372-377
Year: Issue:  3
Journal: Optical Technique

Keyword:  锥束CT图像重建重建区域ART算法;
Abstract: 针对锥束ART算法重建速度慢的问题,考虑到工业CT重建目标尺寸差异较大的特点,提出了一种基于最小重建区域的快速三维图像重建方法.由不同视角下的锥束投影构建最小区域包络,对最小区域包络进行膨胀处理,以消除重建目标边界附近所出现的伪影,在此基础上,给出了射线穿过最小重建区域的体素索引及权因子的计算.该方法能够根据重建目标的尺寸自适应地确定最小重建区域,从而最大限度地减少了计算量.实验结果表明,该方法不...
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