关键词: 重建质量, ART算法, 图像重建, 不完全投影数据

Abstract: The Algebraic Reconstruction Technique is a classical image reconstruction method, it is suit for reconstruction from incomplete projection data. In order to improve the reconstruction speed, the relaxation factor is often simplified to 1 or 0, thus the reconstructions usually suffer from salt and pepper noise. A method for improving reconstruction quality was proposed, the reconstructed image was processed by selectively smoothing after each iteration, then the smoothed image was used as the initial image for next iteration. This method is characterized that it incorporates image processing into image reconstruction. Simulation experiments shows that the method is very effective, not only the reconstruction quality is improved, but also the fuzzy phenomena which caused by smoothing using Box template is overcomed

Key words: algebraic reconstruction technique, image reconstruction, incomplete projection data, reconstruction quality