螺旋CT图像环形伪影产生机制及处理方法  

Spiral ring Artifacts of CT image Generation Mechanism and Processing Method

作　　者：何卫红[1] 方向军[1] 邓承健[1] 范锟[1] 

机构地区：[1]南华大学附属第二医院放射科,衡阳421001

出　　处：《中国医疗器械信息》2015年第12期48-51,共4页China Medical Device Information

摘　　要：目的:环形伪影不仅降低了图像的质量,还给后期的图像分割,图像数据挖掘以及依靠图像为数据的三维重建等造成很大影响。研究环形伪影产生机制及处理方法,可以减少螺旋CT检查时产生的伪影,为临床提供更好的影像资料。方法:收集本院181位患者不同类型和不同程度CT图像环形伪影病例,进行系统研究,其中头部扫描74例,胸部扫描45例,腹部扫描42例,其他部位20例。结果:通过对各部位产生的环形伪影进行分析,给出了环形伪影产生的基本原因,及能够减少和校正环形伪影的方法。结论:环形伪影的产生受多种因素的影响,认知其产生的原因可以避免,抑制伪影的产生,掌握环形伪影处理方法可以消除图像伪影,对优化图像质量和提高临床医学诊断质量和效率具有重要意义。Objective： The ring artifacts not only reduces the quality of the image, the image back to the late segmentation, image data mining and rely on images as data reconstruction caused a great influence. Study of ring artifacts in mechanism and treatment method, artifacts can produce a reduction of spiral CT examination, provide better images for clinical.Methods We collected from 181 patients with different type and degree of ring artifacts of CT image case, a systematic study, in which the head CT scanning in 74 cases, 45 cases chest scan, scan of the abdomen in 42 cases, 20 cases of other site. Results： Through the analysis of ring artifacts in various parts of the basic reason, given the ring artifacts, method and can reduce and correction of ring artifacts. Conclusion： Ring artifact was affected by various factors, the causes of cognitive generated can be avoided, suppresses the artifacts produced, grasp the ring artifact processing method can remove image artifacts, has the vital significance to optimize image quality and improve the quality and efficiency of clinical medical diagnosis.

关 键 词：CT图像 环形伪影 校正 

分 类 号：R445.3[医药卫生—影像医学与核医学]