Acta Optica Sinica, Volume. 33, Issue 10, 1011001(2013)
Sparse Angular Differential Phase-Contrast Computed Tomography Reconstruction Using Bregman Operator Splitting Algorithm
Phase-contrast computed tomography (CT), different from traditional absorption-contrast tomography, is a novel X-ray inspection method and has been widely used for it′s high sensitivity, high resolution and better reconstructions for soft tissues. However, phase-contrat CT usually leads to unacceptably long exposure time and huge X-ray doses. Sparse angular algorithms show significant advantage over in reducing the X-ray doses. Thus, the study of sparse angular differential phase-contrast CT (DPC-CT) is particularly meaningful. After analyzing the characteristics of the DPC-CT, the Bregman operator splitting (BOS) algorithm is introduced into DPC-CT reconstruction and an alternating iteration algorithm for sparse angular DPC-CT is proposed. The numerical simulation and experiment results show that the proposed algorithm can obtain higher reconstruction quality in sparse angular condition.
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Li Jing, Li Mengjie, Sun Yi. Sparse Angular Differential Phase-Contrast Computed Tomography Reconstruction Using Bregman Operator Splitting Algorithm[J]. Acta Optica Sinica, 2013, 33(10): 1011001
Category: Imaging Systems
Received: Apr. 10, 2013
Accepted: --
Published Online: Sep. 6, 2013
The Author Email: Jing Li (dlutburnsky@yahoo.cn)