基于定点DSP的ART算法实现研究  

Implementation of ART Algorithm Based on Fixed Point DSP

作　　者：孙毅刚[1] 王庆勇[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：《现代电子技术》2010年第18期17-20,共4页Modern Electronics Technique

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);民航总局科技基金资助项目(MHRD07z45)

摘　　要：数字信号处理器(DSP)在大量数据计算方面有明显的速度优势,为了提高CT ART算法的图像重建速度,提出基于定点DSP TMS320C6416的算法计算方案。该方案结合ART算法的原理,以及USB 2.0协议在数据传输和定点DSP在数据计算上的速度优势,通过CYPRESS的CY7C68001接口芯片,同时采用SDRAM作为数据缓存,进行DSP与PC机之间大量数据的正确高速传输;通过C语言编写DSP片内算法计算程序并对其进行优化,以降低图像重建时间。最终实验以Shepp_Logan头部剖析图为原始图像,进行重建算法计算,实验结果证实了方案的可行性。DSP has high speed in the computation of mass data, a computation scheme based on fixed point DSP TMS320C6416 algorithm is proposed to increase the speed of ART image reconstruction in CT technology. This method based on the ART theory, and the merit in speed of the USB 2.0 in the data transmission and the fixed DSP in data processing. It takes the CYPRESS CY7C68001 as USB 2.0 interface chipset, the SDRAM as data buffer to make sure the high speed data communication between the DSP and the PC host; and runs and optimizes the ART algorithm with C language to reduce the time consumption in DSP computation. The experiment makes the Shepp_Logan model as the original image and performs the computation of reconstruction algorithm, and the result indicates that the method is feasible.

关 键 词：DSP CT图像重建 ART算法 SDRAM 

分 类 号：TN915-34[电子电信—通信与信息系统]