›› 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
黄魁东a, 张华b, 史仪凯b, 张亮a, 徐哲a
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
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.
中图分类号: (Computed tomography)