期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2013.08.077
关键词
Angle selection; Computed tomography; Dynamic imaging; Information gain
类别
资金
- BOF LP project [25778]
- SBO project TomFood from the Agency for Innovation by Science and Technology in Flanders (IWT)
- Netherlands Organisation for Scientific Research (NWO) [639.072.005]
In X-ray tomography, a number of radiographs (projections) are recorded from which a tomogram is then reconstructed. Conventionally, these projections are acquired equiangularly, resulting in an unbiased sampling of the Radon space. However, especially in case when only a limited number of projections can be acquired, the selection of the angles has a large impact on the quality of the reconstructed image. In this paper, a dynamic algorithm is proposed, in which new projection angles are selected by maximizing the information gain about the object, given the set of possible new angles. Experiments show that this approach can select projection angles for which the accuracy of the reconstructed image is significantly higher compared to the standard angle selections schemes. (C) 2014 Elsevier B.V. All rights reserved.
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