基于CUDA的数字化放射图像重建算法  

Digital reconstruction radiograph rendering algorithm based on CUDA

作　　者：朱奭[1] 常晋义[1] 

机构地区：[1]常熟理工学院计算机科学与工程学院,江苏常熟215500

出　　处：《计算机应用研究》2014年第5期1577-1580,共4页Application Research of Computers

基　　金：江苏省自然科学基金资助项目(BK2012209)

摘　　要：为了提高重建图像的速度及质量,利用CUDA(compute unified device architecture)架构下GPU(graphic processing unit)的多核并行运算能力,将光线投射的几何变换、场景遍历和渲染三个步骤在可编程图像硬件中实现,降低模拟所需的时间;利用3D纹理、光线程基元的同步遍历机制及不透明度提前终止,在不影响成像质量的前提下,减少生成最终模拟效果所需的时间。实验结果表明,该算法不仅可以提高重建的速度,而且成像质量较好。In order to improve the speed and quality of reconstruction image, making use of muhi-core parallel of GPU based on CUDA, this paper actualized three steps of ray-casting which was geometric transform, scene traversal, rendering through programmable graphics hardware, it could reduce the simulation time required. By 3D texture, synchronous traversing mecha- nism of ray thread element and opacity early termination, it could reduce the time required for the final simulation results with- out affecting the imaging quality. The experimental results show that, the algorithm can complete reconstruction of digital radio- graphy image of high speed and high quality.

关 键 词：统一计算设备架构 数字化放射图像重建 并行技术 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]