Robust scatter correction method for cone-beam CT using an interlacing-slit plate

Kui-Dong Huang; Zhe Xu; Ding-Hua Zhang; Hua Zhang; Wen-Long Shi

doi:10.1088/1674-1137/40/6/068202

Chinese Physics C> 2016, Vol. 40> Issue(6) : 068202 DOI: 10.1088/1674-1137/40/6/068202

Robust scatter correction method for cone-beam CT using an interlacing-slit plate

1.
Key Lab of Contemporary Design and Integrated Manufacturing Technology of the Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China
2.
School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

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Abstract：
Cone-beam computed tomography (CBCT) has been widely used in medical imaging and industrial nondestructive testing, but the presence of scattered radiation will cause significant reduction of image quality. In this article, a robust scatter correction method for CBCT using an interlacing-slit plate (ISP) is carried out for convenient practice. Firstly, a Gaussian filtering method is proposed to compensate the missing data of the inner scatter image, and simultaneously avoid too-large values of calculated inner scatter and smooth the inner scatter field. Secondly, an interlacing-slit scan without detector gain correction is carried out to enhance the practicality and convenience of the scatter correction method. Finally, a denoising step for scatter-corrected projection images is added in the process flow to control the noise amplification The experimental results show that the improved method can not only make the scatter correction more robust and convenient, but also achieve a good quality of scatter-corrected slice images.
- CBCT ,
- scatter correction ,
- image fusion ,
- interlacing-slit ,
- noise control

References

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Kui-Dong Huang, Zhe Xu, Ding-Hua Zhang, Hua Zhang and Wen-Long Shi. Robust scatter correction method for cone-beam CT using an interlacing-slit plate[J]. Chinese Physics C, 2016, 40(6): 068202. doi: 10.1088/1674-1137/40/6/068202

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Received: 2015-10-14
Revised: 2016-01-14

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Supported by National Science and Technology Major Project of the Ministry of Industry and Information Technology of China (2012ZX04007021), Aeronautical Science Fund of China (2014ZE53059), and Fundamental Research Funds for Central Universities of China (3102014KYJD022)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Robust scatter correction method for cone-beam CT using an interlacing-slit plate

Corresponding author: Kui-Dong Huang,

1. Key Lab of Contemporary Design and Integrated Manufacturing Technology of the Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China

2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received Date: 2015-10-14

Accepted Date: 2016-01-14

Available Online: 2016-06-05

Fund Project: Supported by National Science and Technology Major Project of the Ministry of Industry and Information Technology of China (2012ZX04007021), Aeronautical Science Fund of China (2014ZE53059), and Fundamental Research Funds for Central Universities of China (3102014KYJD022)

Abstract: Cone-beam computed tomography (CBCT) has been widely used in medical imaging and industrial nondestructive testing, but the presence of scattered radiation will cause significant reduction of image quality. In this article, a robust scatter correction method for CBCT using an interlacing-slit plate (ISP) is carried out for convenient practice. Firstly, a Gaussian filtering method is proposed to compensate the missing data of the inner scatter image, and simultaneously avoid too-large values of calculated inner scatter and smooth the inner scatter field. Secondly, an interlacing-slit scan without detector gain correction is carried out to enhance the practicality and convenience of the scatter correction method. Finally, a denoising step for scatter-corrected projection images is added in the process flow to control the noise amplification The experimental results show that the improved method can not only make the scatter correction more robust and convenient, but also achieve a good quality of scatter-corrected slice images.

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Robust scatter correction method for cone-beam CT using an interlacing-slit plate

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