Dynamic SPECT reconstruction with temporal edge correlation. (13th December 2017)

• Record Type: Journal Article
• Authors: Ding, Qiaoqiao; Burger, Martin; Zhang, Xiaoqun
• Is Part Of: Inverse problems. Volume 34:Number 1(2018:Jan.)
• Publication Date: 2017-12-13
• Subjects: dynamic SPECT -- sparsity -- infimal convolution -- Bregman distance -- edge alignment -- low rank representation; Inverse problems (Differential equations) -- Periodicals; 515.357
• DOI: 10.1088/1361-6420/aa9a94
• Languages: English
• ISSNs: 0266-5611

Abstract

Abstract: In dynamic imaging, a key challenge is to reconstruct image sequences with high temporal resolution from strong undersampling projections due to a relatively slow data acquisition speed. In this paper, we propose a variational model using the infimal convolution of Bregman distance with respect to total variation to model edge dependence of sequential frames. The proposed model is solved via an alternating iterative scheme, for which each subproblem is convex and can be solved by existing algorithms. The proposed model is formulated under both Gaussian and Poisson noise assumption and the simulation on two sets of dynamic images shows the advantage of the proposed method compared to previous methods.