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《Computerized Tomography Theory and Applications》 2018-03
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An Optimal Bone Correction Capable of Simultaneously Suppressing Various Types of Image Artifacts

TANG Shao-jie;ZHANG Yan-bo;WANG You-ming;ZHAO Feng;QIAO Zhi-wei;YANG Xiao-jun;MOU Xuan-qin;ZHU Yi-ning;School of Automation, Xi'an University of Posts and Telecommunications;Beijing Advanced Innovation Center for Imaging Technology, Capital Normal University;Department of Electrical and Computer Engineering , Univ. of Massachusetts Lowell;School of Computer and Information Technology, Shanxi University;Department of Radiology, the First Affiliated Hospital of Xi'an Jiaotong University;School of Electronics and Information Engineering, Xi'an Jiaotong University;  
Tube of X-ray CT system emitting a polychromatic spectrum of photons leads to beam hardening artifacts such as cupping and streaks, while the metal implants in the imaged object results in metal artifacts in reconstructed images. The simultaneous emergence of various types of image artifacts certainly will degrade the diagnostic accuracy in clinics, and so should be deeply researched for suppressing them. In this paper, data consistency condition is exploited to construct an objective function. Nonlinear least square and alterative iteration algorithms are used to solve the optimal scaling factors. Finally, an optimal bone correction approach is acquired to simultaneously correct for cupping, streaks and metal artifacts. Experimental result acquired by a computer simulation demonstrates that the proposed approach can really adaptively determine the optimal scaling factors, and then correct for various types of image artifacts at the same time.
【Fund】: 西邮新星团队基金;; 西北工业大学现代设计与集成制造教育部重点实验室(KF201401);; 东南大学计算机网络与信息集成教育部重点实验室(K93-9-2017-03);; 陕西省教育厅(15JK1673);; 陕西省科技厅(2016JM8034);; 国家自然科学基金(61501310)
【CateGory Index】: TP391.41
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