Fitting Correction Method of Ring Artifacts in Cone-Beam CT Images

摘要：

In the paper, the ring artifacts in the cone-beam CT images caused by the pixel response nonuniformity of the flat panel detector are analyzed, and the fitting correction method of the projective images is introduced to suppress this kind of artifacts. Because this method is at preprocessing stage before the whole reconstructive procedures, it neither increase the reconstruction time and nor result in blur in the reconstruction images. The result shows that it can make ring artifacts reduce dramatically. Finally, further discussions on causing ring artifacts are presented, such as variability of the correction factors by different sampling frames, non-linear factors influences over the whole spectrum etc.

关键词： Cone-Beam CT Flat panel detector Reconstructed Images ring artifacts fitting correction method

作者: LUO Shou-Hua WU Jing ZHANG Bo CHEN Gong

作者单位: School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096 Information Engineering Dept., Jiangsu Provincial Hospital of TCM, Nanjing 210029

会议类型: 国际会议

会议名称: Yangtze River 2009 International Conference on Medical Imaging Physics & The 5th National Annual Meeting of Medical Imaging Physics(长江2009国际医学影像物理和工程大会暨第五届中国医学影像物理学术年会ICMIP2009)

会议地点: 南京

会议语种:英文

页码: 146-151

在线出版日期: 2009-10-23（万方平台首次上网日期，不代表论文的发表时间）