摘要
在用代数重建算法(ART)进行图像重建时,投影序列的访问顺序对重建图像的质量有着重要的影响。针对可获得完备投影数据的场合,提出了分组访问方法。该方法先将投影角度平均分为四组,然后再选择每组的中点,随后依次类推继续选择每组的中点。实验结果表明,重建图像分辨率提高,伪影减少。分组访问方法排列的投影序列尽可能保证了均匀分布,从而所重建的图像质量有明显的提高。
Projection access order in algebraic reconstruction technique （ART） has a great effect on quality in reconstructed image. For instance to get complete projection, the grouping access scheme was presented. The method first groups the projection angle sequence with four groups uniformly, and then choose the midpoint of each group, and so on continue to choose the midpoint of each group. The exper/mental results show that resolution ratios of reconstructed image enhance and artifacts reduce. The method of projection access order as much as possible to ensure uniform distribution, and the quality of reconstructed image significantly improved.
出处
《信息技术》
2014年第9期197-200,共4页
Information Technology
关键词
图像重建
代数重建算法
投影序列
访问顺序
分组访问方式
image reconstruction
algebraic reconstruction technique
projection sequence
access order
grouping access order
