MR图像伪影的识别与消除  

Distinguishing and eliminating of artifact in MR imagine

作　　者：杜玉秀[1] 康少峰[1] 

机构地区：[1]宁夏医学院附属医院,宁夏银川750004

出　　处：《宁夏医学杂志》2004年第1期27-28,共2页Ningxia Medical Journal

摘　　要：目的　探讨MR图像伪影形成的原因、表现形式及消除方法。方法　对 10 0份有伪影干扰的MR图像进行回顾性分析、总结。结果　MR图像伪影产生的来源主要有 4个方面 :磁场 ,包括梯度场的不均匀性 ;外界射频干扰 ;采集技术的不恰当 ;运动和流动效应。结论　正确识别各种伪影的图像特征 。Objective To explore the reasons characters and eliminating of artifact in MR imagine.Methods 100 copies of MR imagines,which affected by artifact were, retrospective by analyzed.Results The following four factors lead to artifact in MR imagine: heterogeneity of magnet field, including gradient field, interference of radiofrequency, inadequacy of collecting methods and floating or moving effect.Conclusion It's very essential for doctors distinguish the characters of artifact of MR imagine.

关 键 词：MR成像 伪影 图像质量 

分 类 号：R445.2[医药卫生—影像医学与核医学]