Scatter correction method for cone-beam CT based on interlacing-slit scan

doi:10.1088/1674-1056/23/9/098106

›› 2014, Vol. 23 ›› Issue (9): 98106-098106.doi: 10.1088/1674-1056/23/9/098106

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Scatter correction method for cone-beam CT based on interlacing-slit scan

黄魁东^a, 张华^b, 史仪凯^b, 张亮^a, 徐哲^a

a Key Laboratory of Contemporary Design and Integrated Manufacturing Technology of the Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China;
b School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

收稿日期:2013-11-04 修回日期:2014-03-03 出版日期:2014-09-15 发布日期:2014-09-15
基金资助:
Project supported by the National Science and Technology Major Project of the Ministry of Industry and Information Technology of China (Grant No. 2012ZX04007021), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51105315), the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2013JM7003), and the Northwestern Polytechnical University Foundation for Fundamental Research, China (Grant Nos. 3102014KYJD022 and JC20120226).

Scatter correction method for cone-beam CT based on interlacing-slit scan

Huang Kui-Dong (黄魁东)^a, Zhang Hua (张华)^b, Shi Yi-Kai (史仪凯)^b, Zhang Liang (张亮)^a, Xu Zhe (徐哲)^a

a Key Laboratory of Contemporary Design and Integrated Manufacturing Technology of the Ministry of Education, Northwestern Polytechnical University, Xi'an 710072, China;
b School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China

Received:2013-11-04 Revised:2014-03-03 Online:2014-09-15 Published:2014-09-15
Contact: Huang Kui-Dong E-mail:kdhuang@nwpu.edu.cn
Supported by:
Project supported by the National Science and Technology Major Project of the Ministry of Industry and Information Technology of China (Grant No. 2012ZX04007021), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51105315), the Natural Science Basic Research Program of Shaanxi Province, China (Grant No. 2013JM7003), and the Northwestern Polytechnical University Foundation for Fundamental Research, China (Grant Nos. 3102014KYJD022 and JC20120226).

摘要/Abstract

摘要： Cone-beam computed tomography (CBCT) has the notable features of high efficiency and high precision, and is widely used in areas such as medical imaging and industrial non-destructive testing. However, the presence of the ray scatter reduces the quality of CT images. By referencing the slit collimation approach, a scatter correction method for CBCT based on the interlacing-slit scan is proposed. Firstly, according to the characteristics of CBCT imaging, a scatter suppression plate with interlacing slits is designed and fabricated. Then the imaging of the scatter suppression plate is analyzed, and a scatter correction calculation method for CBCT based on the image fusion is proposed, which can splice out a complete set of scatter suppression projection images according to the interlacing-slit projection images of the left and the right imaging regions in the scatter suppression plate, and simultaneously complete the scatter correction within the flat panel detector (FPD). Finally, the overall process of scatter suppression and correction is provided. The experimental results show that this method can significantly improve the clarity of the slice images and achieve a good scatter correction.

关键词: cone-beam computed tomography, scatter correction, interlacing slits, image fusion

Abstract: Cone-beam computed tomography (CBCT) has the notable features of high efficiency and high precision, and is widely used in areas such as medical imaging and industrial non-destructive testing. However, the presence of the ray scatter reduces the quality of CT images. By referencing the slit collimation approach, a scatter correction method for CBCT based on the interlacing-slit scan is proposed. Firstly, according to the characteristics of CBCT imaging, a scatter suppression plate with interlacing slits is designed and fabricated. Then the imaging of the scatter suppression plate is analyzed, and a scatter correction calculation method for CBCT based on the image fusion is proposed, which can splice out a complete set of scatter suppression projection images according to the interlacing-slit projection images of the left and the right imaging regions in the scatter suppression plate, and simultaneously complete the scatter correction within the flat panel detector (FPD). Finally, the overall process of scatter suppression and correction is provided. The experimental results show that this method can significantly improve the clarity of the slice images and achieve a good scatter correction.

Key words: cone-beam computed tomography, scatter correction, interlacing slits, image fusion

中图分类号: (Computed tomography)

81.70.Tx

87.57.Q- (Computed tomography) 87.64.Bx (Electron, neutron and x-ray diffraction and scattering) 87.57.C- (Image quality)

黄魁东, 张华, 史仪凯, 张亮, 徐哲. Scatter correction method for cone-beam CT based on interlacing-slit scan[J]. , 2014, 23(9): 98106-098106.

Huang Kui-Dong (黄魁东), Zhang Hua (张华), Shi Yi-Kai (史仪凯), Zhang Liang (张亮), Xu Zhe (徐哲). Scatter correction method for cone-beam CT based on interlacing-slit scan[J]. Chin. Phys. B, 2014, 23(9): 98106-098106.

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Scatter correction method for cone-beam CT based on interlacing-slit scan

Scatter correction method for cone-beam CT based on interlacing-slit scan

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