| 锥束CT图像重建算法在DSP上的加速方法研究 |
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| 引用本文： | 王超, 李建新, 王大会, 闫镔, 李磊. 锥束CT图像重建算法在DSP上的加速方法研究[J]. CT理论与应用研究, 2010, 19(4): 19-26. |
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| 作者姓名： | 王超 李建新 王大会 闫镔 李磊 |
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| 作者单位： | 1.国家数字交换系统工程技术研究中心, 郑州 450002 |
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| 基金项目： | 国家863计划新概念高性能计算机体系结构与系统研制重点项目，上海市科委重大科技攻关项目，河南省基础与前沿技术研究计划项目 |
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| 摘 要： | 随着CT技术的发展,重建速度已成为CT系统的重要指标之一,图像重建加速的研究也成为CT研究的热点之一。DSP由于采用哈佛结构,具有专门的硬件乘法器以及广泛采用流水线操作等特点,已开始应用于图像重建加速。本文针对近年来开始应用的三维锥束CT的图像重建算法进行了DSP加速方法研究。首先介绍了DSP应用于图像重建的研究现状,其次,通过对三维重建的典型算法——FDK的算粒分解分析,结合DSP的硬件结构的特点,提出了一种基于DSP的CT图像重建的综合加速技术。该方法通过C的优化、汇编优化和编译优化的综合使用,充分利用了硬件结构和软件流水技术,采用TMS320C6455芯片实现了CT图像重建的加速计算,实验结果表明,该方法取得了较高加速比。
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| 关 键 词： | CT图像 三维重建 FDK DSP 软件流水线 |
| 收稿时间： | 2010-06-21 |
Study on Acceleration of Cone-beam CT Image Reconstruction Based on DSP |
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| WANG Chao, LI Jian-xin, WANG Da-hui, YAN Bin, LI Lei. Study on Acceleration of Cone-beam CT Image Reconstruction Based on DSP[J]. CT Theory and Applications, 2010, 19(4): 19-26. |
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| Authors: | WANG Chao LI Jian-xin WANG Da-hui YAN Bin LI Lei |
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| Affiliation: | 1.National Digital Switching System Engineering & Technological R & D Center, Zhengzhou 450002, China |
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| Abstract: | With the development of CT technology,reconstruction speed has become an important indicator of CT systems,and the research of acceleration image reconstruction has become a hotspot in CT.For the Harvard architecture,dedicated hardware multiplier and the extensive use of pipelining,etc.,DSP has been applied to acceleration image reconstruction.In this paper,the method of acceleration three-dimensional cone-beam CT image reconstruction using DSP is researched.Firstly,the situation that DSP is used in image reconstruction is introduced.Secondly,an acceleration CT image reconstruction technique based on DSP is presented though the decomposition of the typical three-dimensional reconstruction algorithm-FDK,combined with the characteristics of the hardware structure of DSP.The hardware architecture and soft pipelining are fully utilized with C optimization,assembler optimization and compiler optimization.Finally,the acceleration computing of CT image reconstruction is achieved with TMS320C6455 chip.The experimental results show that the method achieved higher speedup. |
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| Keywords: | CT images 3D reconstruction FDK DSP software pipelining |
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