X射线CT转台单侧两次螺旋扫描单层重排重建算法

李磊; 韩玉; 席晓琦; 王林元; 闫镔; 包尚联

doi:doi:10.3788/aos201636.0934001

光学学报, 2016, 36 (9): 0934001, 网络出版: 2016-08-18

X射线CT转台单侧两次螺旋扫描单层重排重建算法下载： 529次

Single-Slice-Rebinning Reconstruction Algorithm with One-Sided Two Helical Scans for X-Ray CT System

论文大纲

李磊 ^1,*韩玉 ¹席晓琦 ¹王林元 ¹闫镔 ¹包尚联 ²

作者单位

¹ 国家数字交换系统工程技术研究中心，河南郑州 450002

² 北京大学重离子物理研究所，北京 100871

AI 词云图 AI一句话精读 AI短摘要

注：本部分内容由 AI 自动生成，请您知悉。

摘要

锥束计算机断层成像（CT）在临床医学及工业无损检测等诸多领域获得了越来越广泛的应用。但是，受面阵探测器尺寸等硬件条件限制，锥束CT的成像视野有限，难以满足实际应用中对大尺寸物体成像的需求。为了扩展锥束CT的视野，提出了锥束CT转台单侧两次螺旋扫描单层重排重建算法。该算法在转台的同一侧进行两次螺旋扫描，通过统一成像几何条件，将两组螺旋锥形束投影重排为多层平行束投影，利用平行束投影的对称性去除数据的横向截断，得到一组完全覆盖物体横截面的平行束投影数据，再通过滤波反投影方式得到重建图像。实验结果表明，该方法的成像视野扩展率可达2.56，且成像质量与传统全覆盖算法相当。

Abstract

X-ray computed tomography (CT) has been widely applied as a powerful tool in both clinical medicine and industrial non-destructive test areas. With the development of flat panel detector in detection efficiency and anti-radiation property, the cone-beam CT based on the cone-beam source and the flat panel detector has been broadly used. However, the field of view of cone-beam CT is restricted by the hardware conditions such as detector size, and thereby the accessibility for larger size object applications is limited. In order to enlarge the field of view of cone-beam CT, a one-sided two-helical-scan single-slice-rebinning reconstruction algorithm is proposed. By performing one-sided two helical scans and normalizing the imaging geometries, two groups of helical cone-beam projections are recombined into one multi-slice parallel-beam projection, whose symmetrical feature is utilized to remove the transverse truncation in the data obtained, then the parallel-beam projection data covering the complete object cross-section is obtained, and thus the images are reconstructed by back projection. The experimental results show that the proposed algorithm can extend the field of view by 2.56 times with comparable imaging quality compared to the traditional algorithm.

参考文献

[1] 包尚联. 现代医学影像物理学[M]. 北京: 北京大学医学出版社, 2003.

Bao Shanglian. Modern medical imaging physics[M]. Beijing: Peking University Medical Press, 2003.

[2] 马继明, 张建奇, 宋顾周, 等. 全变分约束迭代滤波反投影CT重建[J]. 光学学报, 2015, 35(2): 0234002.

Ma Jiming, Zhang Jianqi, Song Guzhou, et al. Total variation constrained iterative filtered backprojection CT reconstruction method[J]. Acta Optica Sinica, 2015, 35(2): 0234002.

[3] Hounsfield G N. Computerized transverse axial scanning (tomography): Part 1. Description of system[J]. British Journal of Radiology, 1973, 46(552): 1006-1022.

[4] Vavrik D, Dammer J, Jakubek J, et al. Advanced X-ray radiography and tomography in several engineering applications[J]. Nuclear Instruments and Methods in Physics Research A, 2011, 633(S1): S152-S155.

[5] Bruno G, Ehrig K, Haarring H, et al. Industrial and synchrotron X-ray CT applications for materials characterisation[C]. Conference on Industrial Computed Tomography, Wels, 2014: 15-31.

[6] 毛灵涛, Chiang Fu-Pen, 袁则循. 基于CT的数字体散斑法测量物体内部三维变形场[J]. 光学学报, 2015, 35(3): 0312001.

Mao Lingtao, Chiang Fu-Pen, Yuan Zexun. Three-dimensional displacement measurement in solid using digital volumetric speckle photography based on computer tomography[J]. Acta Optica Sinica, 2015, 35(3): 0312001.

[7] 张国强, 周虎, 和友, 等. 基于极坐标变换去除计算机层析图像环形伪影[J]. 光学学报, 2012, 32(5): 0534001.

Zhang Guoqiang, Zhou Hu, He You, et al. Ring artifacts correction of computerized tomography image based on polar-coordinate transform[J]. Acta Optica Sinica, 2012, 32(5): 0534001.

[8] Fu J, Lu H N. Research of large field of view scan mode for industrial CT[J]. Chinese Journal of Aeronautics, 2003, 16(1): 59-64.

[9] Han Y, Yan B, Li L, et al. Multiple helical scans and the reconstruction for over FOV-sized objects in cone-beam CT[J]. Chinese Physics B, 2012, 21(6): 068701.

[10] 韩玉, 李磊, 闫镔, 等. 一种基于Radon逆变换的半覆盖螺旋锥束CT重建算法[J]. 物理学报, 2015, 64(5): 058704.

Han Yu, Li Lei, Yan Bin, et al. A half-covered helical cone-beam CT reconstruction algorithm based on the Radon inversion transformation[J]. Acta Physica Sinica, 2015, 64(5): 058704.

[11] Leng S, Zhuang T Z, Nett B, et al. Exact fan-beam image reconstruction algorithm for truncated projection data acquired from an asymmetric half-size detector[J]. Physics in Medicine Biology, 2005, 50(8): 1805-1820.

[12] Li L, Chen Z Q, Zhang L, et al. A new cone-beam X-ray CT system with a reduced size planar detector[J]. High Energy Physics and Nuclear Physics, 2006, 30(8): 812-817.

[13] Schfer D, Grass M. Cone-beam filtered backprojection for circular X-ray tomography with off-center detector[C]. Proceedings of 10th Fully 3D Meeting and 2nd HPIR Workshop, Beijing, 2009: 86-89.

[14] Wang G. X-ray micro-CT with a displaced detector array[J]. Medical Physics, 2002, 29(7): 1634-1636.

[15] Kunzea H, Dennerlein F. Cone beam reconstruction with displaced flat panel detector[C]. Proceedings of 10th Fully 3D Meeting and 2nd HPIR Workshop, Beijing, 2009: 138-141.

[16] Fu J, Lu H N, Li B, et al. X-CT imaging method for large objects using double offset scan mode[J]. Nuclear Instruments and Methods in Physics Research A, 2007, 575(3): 519-523.

[17] Chen M, Zhang H T, Zhang P. BPF-based reconstruction algorithm for multiple rotation-translation scan mode[J]. Progress in Natural Science, 2008, 18(2): 209-216.

[18] Zou X B, Zeng L, Wang J, et al. Improved scanning and reconstruction of large objects by cone-beam industrial computed tomography[C]. Proceedings of 9th IASTED International Conference on Signal and Image Processing, Crete, 2007.

[19] 邹晓兵, 曾理. 重排的半覆盖螺旋锥束CT的反投影滤波重建[J]. 光学精密工程, 2010, 18(9): 2077-2085.

Zou Xiaobing, Zeng Li. Rebinned BPF reconstruction for helical cone-beam CT with half-cover scanning[J]. Optics and Precision Engineering, 2010, 18(9): 2077-2085.

[20] Guo J, Zeng L, Zou X. An improved half-covered helical cone-beam CT reconstruction algorithm based on localized reconstruction filter[J]. Journal of X-Ray Science and Technology, 2011, 19(3): 293-312.

[21] Zou X B, Zeng L, Li Z J. Dual helical cone-beam CT for inspecting large object[J]. Journal of X-Ray Science and Technology, 2009, 17(3): 233-251.

[22] Zeng L, Zou X B. Katsevich-type reconstruction for dual helical cone-beam CT[J]. Journal of X-Ray Science and Technology, 2010, 18(4): 353-367.

[23] Zeng L, Zou X B. BPF-type reconstruction for dual helical cone-beam CT[J]. Current Medical Imaging Reviews, 2011, 7(2): 125-135.

[24] Han Y, Yan B, Li L, et al. Rebinned filtered back-projection reconstruction from truncated data for half-covered helical cone-beam CT[J]. IEEE Transactions on Nuclear Science, 2014, 61(5): 2753-2763

[25] Wang G, Lin T H, Cheng P C, et al. Scanning cone-beam reconstruction algorithms for X-ray microtomography[C]. SPIE, 1991, 1556: 99-112.

李磊, 韩玉, 席晓琦, 王林元, 闫镔, 包尚联. X射线CT转台单侧两次螺旋扫描单层重排重建算法[J]. 光学学报, 2016, 36(9): 0934001. Li Lei, Han Yu, Xi Xiaoqi, Wang Linyuan, Yan Bin, Bao Shanglian. Single-Slice-Rebinning Reconstruction Algorithm with One-Sided Two Helical Scans for X-Ray CT System[J]. Acta Optica Sinica, 2016, 36(9): 0934001.

X射线CT转台单侧两次螺旋扫描单层重排重建算法下载： 529次

关于本站 Cookie 的使用提示

全站搜索

X射线CT转台单侧两次螺旋扫描单层重排重建算法 下载： 529次

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索

X射线CT转台单侧两次螺旋扫描单层重排重建算法下载： 529次