中国物理B ›› 2012, Vol. 21 ›› Issue (6): 68701-068701.doi: 10.1088/1674-1056/21/6/068701
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
韩玉a, 闫镔a, 李磊a, 宇超群b, 李建新a, 包尚联c
Han Yu(韩玉)a), Yan Bin(闫镔)a)†, Li Lei(李磊)a), Yu Chao-Qun(宇超群)b), Li Jian-Xin(李建新)a), and Bao Shang-Lian(包尚联)c)
摘要: In cone-beam computed tomography (CBCT), there are often cases where the size of the specimen is larger than the field of view (FOV) (referred to as over FOV-sized (OFS)). To acquire the complete projection data for OFS objects, some scan modes have been developed for long objects and short but over-wide objects. However, these modes still cannot meet the requirements for both longitudinally long and transversely wide objects. In this paper, we propose a multiple helical scan mode and a corresponding reconstruction algorithm for both longitudinally long and transversely wide objects. The simulation results show that our model can deal with the problem and that the results are acceptable, while the OFS object is twice as long compared with the FOV in the same latitude.
中图分类号: (X-ray imaging)