摘要
为了利用迭代算法快速实现不完全投影数据下的图像重建,介绍了乘型ART(A lgebraic Reconstruction Techniques)迭代算法的快速实现,利用投影矩阵是一个极大的超稀疏矩阵的性质,对迭代矩阵计算方法进行简化,并对其存储结构和检索方法进行优化设计,使迭速度得到了大大提高.在不完全投影的情况下,该迭代算法具有一定的优势.同时针对迭代模型不足导致的重建伪影提出了校正方法,取得了理想的效果.
In order to realize the fast image reconstruction with iterative algorithm on the base of(incomplete) projection data,the fast multiplying-type ART(Algebraic Reconstruction(Techniques)) algorithm is introduced.According to the fact that the projection matrix is a super sparse matrix,the calculating method of the iterative matrix is simplified,and it s structure and looking up way are optimized,which make iterative speed improved obviously.The result proves that the multiplying-type ART algorithm has an adva...
出处
《应用基础与工程科学学报》
EI
CSCD
2005年第S1期136-141,共6页
Journal of Basic Science and Engineering
关键词
图像重建
ART
计算机断层扫描
滤波反投影
迭代矩阵
image reconstruction
ART
computed tomography
filter back-projection.（iterative） matrix
