ART算法中松弛因子对中子CT成像结果的影响研究

Effects of Relaxation Factor on ART Algorithm for Neutron CT

摘要: ART算法是CT重建迭代算法中重要和经典的算法,而松弛因子是ART算法中的重要参数。由建于绵阳的冷中子照相装置采集得到投影图像,本文研究了松弛因子对ART重建算法重建图像收敛速度的影响和对重建图像质量的影响,从兼顾质量和效率的角度出发,给出了松弛因子的选择范围,对中子CT成像迭代重建具有重要参考意义。

Abstract: ART is one of significant and classical methods in CT reconstruction. Relaxation factor is an important parameter of ART. In this article, effect of relaxation factor on convergence speed and quality of reconstructed images has been researched, using the projections obtained from Cold Neutron CT facility of Mianyang Research Reactor, A chosen range of relaxation factor is given considering reconstruction efficiency and image quality, which has an important reference to neutron CT reconstruction.