Acta Optica Sinica, Volume. 36, Issue 9, 911008(2016)
Backprojection Filtering Reconstruction Algorithm for Circle-Plus-Line Trajectory in Cone Beam CT
The backprojection filtering reconstruction algorithm is proposed based on M-line for the circle-plus-line trajectory. The concise and appropriate M-line selection method is proposed, combined with the geometrical characteristics of the trajectory. The backprojection integral interval is obtained through solving the R-line coordinates which pass through the reconstructed point on the M-line, and the proposed reconstruction formula is derived. It is proved that the R-line within the reconstruction region for the circle-plus-line trajectory is unique, and the shortest length of the needed line trajectory is solved. Experimental results show that the proposed method can improve reconstruction image quality in large cone-angle scanning.
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Li Zengguang, Li Lei, Han Yu, Xi Xiaoqi, Yan Bin, Li Jianxin. Backprojection Filtering Reconstruction Algorithm for Circle-Plus-Line Trajectory in Cone Beam CT[J]. Acta Optica Sinica, 2016, 36(9): 911008
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Received: Mar. 31, 2016
Accepted: --
Published Online: Sep. 9, 2016
The Author Email: Zengguang Li (lizengguang8@126.com)