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Proceedings Paper

Effect of projection number on slice image quality of micro-CT system
Author(s): Zheng Fang; Hui Gong; Guang Yang; Tianxu Zhang
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Paper Abstract

The number of projection affects the reconstruction quality in computed tomography system. Larger projection number will lead to better reconstruction quality. Infinite projections can reconstruct the specimen without mathematical error. On the other hand, less projection number can reduce the radiation dose, save time and keep the patients comfortable. The optimal number of projection compromises both the mathematical accuracy and real-life requirement. The purpose of this paper is to find the relationship between the projection number and the reconstruction quality. A micro-CT system is developed to validate the relationship between projection number and reconstruction quality. But the actual precision and signal to noise ratio is hard to find in experiments, because the sample are not standard whose physical characteristics are certain. We can only provide limited projection number and get relative reconstruction quality in the experiment. Half-scan method can reduce radiation dose, and it can achieve better results with sufficient sampling.

Paper Details

Date Published: 30 October 2009
PDF: 5 pages
Proc. SPIE 7497, MIPPR 2009: Medical Imaging, Parallel Processing of Images, and Optimization Techniques, 74972B (30 October 2009); doi: 10.1117/12.833053
Show Author Affiliations
Zheng Fang, Huazhong Univ. of Science and Technology (China)
Hui Gong, Huazhong Univ. of Science and Technology (China)
Guang Yang, Huazhong Univ. of Science and Technology (China)
Tianxu Zhang, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7497:
MIPPR 2009: Medical Imaging, Parallel Processing of Images, and Optimization Techniques

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