改进的数字重建影像快速生成算法  

Improved algorithm for rapid generation of digitally reconstructed radiographs

作　　者：罗博博 贠照强[1] 卢振泰[1] 林仁回[1] 张娟[1] 冯前进[1] 

机构地区：[1]南方医科大学生物医学工程学院,广东广州510515

出　　处：《计算机工程与设计》2014年第5期1743-1749,共7页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2012AA02A616);国家科技支撑计划基金项目(2012BAI14B02)

摘　　要：为解决临床骨科手术导航系统的实时性问题,提高数字重建影像(DRRs)的生成速度,提出了一种改进的数字重建影像快速生成算法。基于光线投影算法的DRRs生成原理,采用CUDA硬件加速,引入大步长与只采样骨性结构相结合的降采样重建DRRs。实验结果表明,该算法不仅在速度上具有很明显的优势而且能保证获取的DRRs和临床X线图像的精确配准,满足了临床应用的实时性要求。To address the problem of Real-time in clinical orthopaedic surgery navigation system, enhance the velocity of generating Digitally Reconstructed Radiographs （DRRs）, an improved algorithm for rapid generation of DRRs is proposed. Based on Ray casting algorithms, generation of DRRs is accelerated by CUDA in combination with desampling of increasing sampling step and sampling only bones. Experiments show that the improved algorithm of generating DRRs had apparent advantage in computing speed, could ensure accurate registration of DRRs to clinical X-ray images and could meet the real-time requirement of clinical applications.

关 键 词：数字重建影像 光线投影 降采样 计算统一设备架构 骨科手术导航 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]