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论文类型：期刊论文

发表时间：2012-03-01

发表刊物：Guangxue Xuebao/Acta Optica Sinica

收录刊物：EI、PKU、ISTIC、Scopus

卷号：32

期号：3

ISSN号：02532239

摘要：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-L 1 algorithm which fuse the L 1 constraint into the ART algorithm. The numerical simulation and experimental results show that the ART-L 1 algorithm can significantly improve the image quality of the sparse angular DPC-CT reconstructions.