计算机应用研究2012，Vol.29Issue(9)：3521-3524,4.DOI:10.3969/j.issn.1001-3695.2012.09.085
锥束CT感兴趣区域图像重建研究
Image reconstruction of cone-beam CT for region of interest
摘要
Abstract
The projection data is often truncated during scanning within the region of interest ( ROI) by cone-beam CT, which results in incompleteness of projection data. Aiming at the problem of image reconstruction from incomplete projection data, this paper proposed ART algorithm based on iteration to reconstruct for ROI. The shortage of ART was its large time of computations and slow reconstruction speed. To improve the reconstruction speed of ART, It proposed a fast parallel image reconstruction method based on multi-core. Firstly, it divided the 3D reconstruction region equally into two blocks by centre plane, and the detector plane too. Then, it calculated the projection data of virtual detector by bilinear interpolation. Finally, imle-mented the ART algorithm parallel using multi-thread technique on multi-core platform, and improved the reconstruction speed about 2 times with high precision. On this basis, using ART to reconstruct different ROI of 3D Shepp-Logan phantom by simulation , experimental results show that it is feasible to reconstruct ROI with ART.关键词
锥束CT/感兴趣区域/图像重建/ART算法Key words
cone-beam CT/region of interest/image reconstruction/algebraic reconstruction technique( ART) algorithm分类
信息技术与安全科学引用本文复制引用
张顺利,张定华,程云勇,李小林..锥束CT感兴趣区域图像重建研究[J].计算机应用研究,2012,29(9):3521-3524,4.基金项目
陕西省自然科学基金资助项目(2009JQ8017) （2009JQ8017）
中国博士后科学基金资助项目(20110491690) （20110491690）
陕西省教育厅专项基金资助项目(11JK1030) （11JK1030）
咸阳师范学院引进人才资助项目(1OXSYK102) （1OXSYK102）
