功能磁共振的质量控制方案分析  

Analysis on DQA Protocol of fMRI

作　　者：唐鹤菡[1] 刘荣波[1] 王存玖[2] 幸浩洋[1,2] 龚启勇[1] 

机构地区：[1]四川大学华西医院影像中心放射科,成都610041 [2]四川大学物理科学与技术学院应用物理系,成都610064

出　　处：《生物医学工程学杂志》2010年第6期1247-1250,共4页Journal of Biomedical Engineering

摘　　要：本文通过对水模扫描,获取数据质量控制(DQA)参数,以功能磁共振(fMRI)序列获取序列图像进行信噪比、漂移等计算,漂移计算方法简化为对兴趣区(ROI)区域平均信号强度的极值处理。长期应用该方法的实践表明,该方法能有效地反映出设备的成像性能与稳定性,是一种简便可行的fMRI质量控制方法。Our purpose is to introduce and analyze the data quality assurance（DQA） protocol of functional magnetic resonance imaging（fMRI）.A water phantom was scanned to get DQA indexes.An fMRI sequence was used to get signal noise ratio（SNR）and Drift,which was calculated from maximum difference ratio of the average signal intensity in the region of interest（ROI） of image serials.The long period application of this method demonstrated that this DQA protocol can reflect imaging performance and the state of stability of the MRI scanner.Some application experience and discussion involved in DQA were also presented here.

关 键 词：功能磁共振成像 数据质量控制 信噪比 漂移 

分 类 号：R445.2[医药卫生—影像医学与核医学]