A hierarchical algorithm for fast backprojection in helical cone-beam tomography

A hierarchical algorithm for fast backprojection in helical cone-beam tomography
复制标题

螺旋锥形束断层扫描中快速反投影的分层算法

DOI:
10.1109/isbi.2004.1398814
复制
发表时间:
2004
期刊:
2004 2nd IEEE International Symposium on Biomedical Imaging: Nano to Macro (IEEE Cat No. 04EX821)
影响因子:
--
通讯作者:
Y. Bresler
Y. Bresler
中科院分区:
--
文献类型:
--
作者:
J. Brokish;Y. Bresler

文献摘要

被引文献

相似文献

现有的精确螺旋锥束(HCB)层析重建算法涉及一个3-D的反投影步骤,占主导地位的算法的计算成本。本文提出了一种快速的分层三维反投影算法,推广了快速的二维平行束和扇束算法,使这一步的复杂度从O(N/sup 4/)降低到O(N/sup 3/logN),大大加快了重建过程。
Existing algorithms for exact helical cone beam (HCB) tomographic reconstruction involve a 3-D backprojection step, which dominates the computational cost of the algorithm. We present a fast hierarchical 3-D backprojection algorithm, generalizing fast 2-D parallel beam and fan beam algorithms, which reduces the complexity of this step from O(N/sup 4/) to O(N/sup 3/log N), greatly accelerating the reconstruction process.