An Efficient Ring Artifact Reduction Method Based on Projection Data for Micro-CT Images

Authors

  • M. A. Yousuf Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail
  • M. Asaduzzaman Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail

DOI:

https://doi.org/10.3329/jsr.v2i1.2645

Keywords:

Micro-CT, Ring artifact correction, Flat-panel detector, Filtered back-projection, Small animal imaging.

Abstract

Ring artifacts are very troublesome in a flat-panel based micro computed tomography (micro-CT) since they might severely degrade visibility of the micro-CT images. Unlike ring artifacts in other types of micro-CTs such as image-intensifier based micro-CT, ring artifacts in a flat-panel detector based micro-CT are hardly removable since the sensitivity of the pixel elements in a flat-panel detector is less uniform than in other types of x-ray detectors. The dependence of the ring artifacts on many imaging conditions, such as tube voltage, detector integration time and phantom size, was first investigated. Based on the observation that the ring artifacts are not imaging-condition-invariant in a flat-panel detector based micro-CT, an efficient ring artifact correction method has been developed based on post-processing. In the filtered sinogram, the ring artifact positions are identified and then the defective lines are corrected in the original projection data before the filtered back-projection. Experimental results on capacitor phantom, contrast phantom and bone images verify the efficacy of the proposed method.

 

Keywords: Micro-CT; Ring artifact correction; Flat-panel detector; Filtered back-projection; Small animal imaging.

 

© 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.

 

 

DOI: 10.3329/jsr.v2i1.2645               J. Sci. Res. 2 (1), 37-45 (2010)

 

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Author Biographies

M. A. Yousuf, Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail

Mohammad Abu Yousuf

 

 

Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail1902 , Bangladesh

M. Asaduzzaman, Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail

Muhammad Asaduzzaman

Department of Computer Science and Engineering, Mawlana Bhashani Science and Technology University, Santosh, Tangail 1902 , Bangladesh

 

 

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Published

2009-12-25

How to Cite

Yousuf, M. A., & Asaduzzaman, M. (2009). An Efficient Ring Artifact Reduction Method Based on Projection Data for Micro-CT Images. Journal of Scientific Research, 2(1), 37–45. https://doi.org/10.3329/jsr.v2i1.2645

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Section

Section A: Physical and Mathematical Sciences