基于现代GPU的实时锥束重建算法研究  

Real-Time 3D Cone-Beam Reconstruction Based on Modern GPU

作　　者：孙毅刚[1] 孙修宇[1] 张红颖[1] 

机构地区：[1]中国民航大学航空自动化学院,天津300300

出　　处：《核电子学与探测技术》2010年第9期1260-1265,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金委员会与中国民用航空总局联合资助项目(60672168);民航总局科技基金项目(MHRD07z45)

摘　　要：FDK算法是一种被广泛应用的小锥角近似三维重建算法,但其运算量大,重建时间长。因此,本文提出了一种基于现代GPU实现的实时FDK加速算法。该方法充分结合现代GPU设备,通过灵活有效的并行策略减少反投影所需要的计算量;并利用一种新的基于角度相关性的优化方案进一步提升该算法的性能。大量实验表明该算法在不牺牲重建质量的前提下可以获得更高的加速性能。FDK algorithm is the most popular approximate cone-beam reconstruction method for a scan at small cone angles,but its computation is very costly.Therefore an improved real-time reconstruction algorithm is proposed in this paper.This method accelerates FDK algorithm based on modern GPU using an efficient parallel strategy to simplify the back-projection computation significantly.Moreover,a new trigonometric relevancy is adopted to boost the performance of this parallel strategy.A number of experiments were performed to verify the proposed algorithm and the results show that this method is accurate and efficient.

关 键 词：FDK 图形处理器 锥束重建 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]