功能磁共振的质量控制方案分析

Analysis on DQA Protocol of fMRI

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.