常用的几种插值方法在CT系统金属伪影校正中的性能比较  

Comparison among general interpolation methods for metal artifacts reduction in CT images

作　　者：谷建伟[1] 张丽[1] 陈志强[1] 邢宇翔[1] 

机构地区：[1]清华大学工程物理系,北京100084

出　　处：《核电子学与探测技术》2006年第6期905-907,925,共4页Nuclear Electronics & Detection Technology

摘　　要：相比利用迭代重建算法校正金属伪影,对投影数据插值来校正金属伪影的算法有诸多优点(如计算快速、容易算法实现等),因此实际校正中多用插值方法。不同的插值方法对校正结果有很大的影响。对目前常用的线性插值、三次样条插值和多项式插值这几种插值方法作了简单介绍,并利用这些方法分别对基于Sheep-Logan模型的仿真结果进行校正和对实际的CT扫描的结果进行校正,对这些方法的校正效果作了比较和讨论。Compared with the iterative reconstruction algorithm for metal artifacts reduction, projection interpolation methods have numerous advantages, such as efficient computation, easy algorithm implementation and etc, so they are frequently applied in practice. Different interpolation methods have different impacts on correction results. Several interpolation methods including linear, spine and cubic polynomial interpolation are discussed here. We compare the different correction results of the different interpolation methods through numerical simulations and practical phantom experiments.

关 键 词：金属伪影 插值方法 CT 

分 类 号：O411.3[理学—理论物理]