【作者】 李真真； 杜明辉；

【Author】 LI Zhenzhen DU Minghui (The College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640)

【机构】 华南理工大学电子与信息学院；

【摘要】 当前断层成像已经步入锥形束重构的3D 时代,锥形束的投影轨道一直是实现重构的基础问题。本文基于新兴的 R～line 算法的特征对锥形束典型的投影轨道的重构区域及其离散化对重构精度的影响作了深入的研究, 并推导了在 R-line 算法下锥形束重构投影轨道的相关定理。更多还原

【Abstract】 Cone-beam based Tomographic Reconstruction has become the dominant researching subject in 3D computed tomography fields,and searching for proper projection trajectory has always been a principal question for reconstruction implementation.In this paper a careful study of typical projection trajectories was proposed based on a newly introduced R-line algorithm.Reconstruction range for each trajectory was analyzed and influence of discrete trajectory on reconstruction accuracy was illustrated.Furthermore,general conclusions for projection trajectories fitting for R-line algorithm were obtained.更多还原