MR镜像伪影的成因探讨与解决方案  

Discussion on the Causes of MR Mirror Image Artifacts and Its Solution

作　　者：汪红志[1] 李永豪[1] 任朝晖[1] 刘聪[1] 张学龙[1] 

机构地区：[1]上海理工大学医疗器械与食品学院

出　　处：《中国医疗设备》2008年第3期6-9,共4页China Medical Devices

基　　金：上海市教育科技发展基金项目(06EZ026)

摘　　要：核磁共振成像仪接收机模拟部分的正交检波系统I/Q通道的幅相不一致时会产生镜频信号,MR图像上会出现镜像伪影。本文分析了实验成像过程MR镜像峰与镜像伪影的产生原因,并提出了应用直接数字化正交检波技术(Digital quadrature demodulation technique)消除镜像伪影的解决方法。Analyzes the reason why magnetic resonance imaging needs quadrature demodulation, focuses on the origination as well as the causes and analysis on MR mirror crest and mirror image in imaging experiments, and also puts forwars the solution to apply digital quadrature demodulation technology in magnetic resonance imaging devices to eliminate the mirror artifact.

关 键 词：核磁共振仪 MR图像 镜像伪影 正交检波技术 

分 类 号：R445.2[医药卫生—影像医学与核医学]