Acta Optica Sinica, Volume. 32, Issue 3, 311002(2012)
L1-Norm-Based Differential Phase-Contrast Computerized Tomography Reconstruction Algorithm with Sparse Angular Resolution
Differential phase contrast computerized tomography (DPC-CT) is a novel X-ray inspection method. However, DPC-CT usually requires several sampling attempts, which will inevitablly introduce unacceptabe long exposure time and huge X-ray doses. Sparse angular algorithms show significant advantage in reducing the exposure time and X-ray doses. Thus, the study of sparse angular DPC-CT is particularly important. After analyzing the characteristics of the DPC-CT, we introduce the compressive sensing theory into the DPC-CT reconstruction and propose a reconstruction algorithm for DPC-CT named as ART-L1 algorithm which fuse the L1 constraint into the ART algorithm. The numerical simulation and experimental results show that the ART-L1 algorithm can significantly improve the image quality of the sparse angular DPC-CT reconstructions.
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Li Jing, Sun Yi. L1-Norm-Based Differential Phase-Contrast Computerized Tomography Reconstruction Algorithm with Sparse Angular Resolution[J]. Acta Optica Sinica, 2012, 32(3): 311002
Category: Imaging Systems
Received: Aug. 31, 2011
Accepted: --
Published Online: Feb. 8, 2012
The Author Email: Jing Li (dlutburnsky@yahoo.cn)