Journal
PHYSICA SCRIPTA
Volume 98, Issue 11, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1402-4896/acfacd
Keywords
exterior CT problem; CT imaging; iterative reconstruction algorithm; spectral CT imaging
Categories
Ask authors/readers for more resources
The exterior CT problem is a special X-ray CT imaging problem used for nondestructive inspections of large tubular samples. In this paper, a regularization model is proposed to solve the exterior CT problem, and its effectiveness is verified.
The exterior CT problem is a special x-ray CT imaging problem, which is often used for nondestructive inspections of large tubular samples. It can image a pipeline wall with a relatively small detector. However, exterior imaging is challenging owing to the incomplete data obtained. In this paper, we propose a regularization model for the exterior CT problem, in which an edge-preserving diffusion and edge-preserving smoothing regularizer is employed. In addition, the polychromatic characteristic of the emitted x-rays is also considered so that the model is closer to the actual physical process. Using the linearization strategy, a corresponding solution algorithm is derived. The proposed model and the algorithm are verified with both simulated data and real data. It is shown that the two type of artifacts, exterior problem artifacts and beam-hardening artifacts, can be effectively suppressed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available