Accurate Image Reconstruction of Few-view Ptychrography X-ray Computed Tomography

Ptychrograhic x-ray computed tomography (PX-CT) is a novel analysis tool in materials science. It is based on the coherent diffraction and enables the non-destructive observation of the internal structures of the specimen at the nano-scale. Few-view PX-CT can permit rapid scanning with a reduced amount of dataset and has a great potential on material performance evaluation and non-destructive testing. There are often challenges for the image reconstruction in few-view PX-CT because of the insufficient projection data. In this paper, an accurate reconstruction method is developed and investigated for few-view PX-CT. It is based on an algebraic iteration reconstruction technique, which minimizes the image total variation and permits accurate tomographic imaging with less data. The numerical results demonstrate that the presented method can handle incomplete projection data in few-view PX-CT. It will be helpful for PX-CT applications in materials science.