Yang Shaolin, Ross Thomas J, Zhang Yanqiong, Stein Elliot A, Yang Yihong
Neuroimaging Research Branch, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD 21224, USA.
Neuroimage. 2005 Aug 1;27(1):153-62. doi: 10.1016/j.neuroimage.2005.02.050. Epub 2005 Apr 21.
A voluntary head motion suppression method using feedback to subjects of their own head motion information is demonstrated. A real-time fMRI system was developed on standard MR imaging hardware for this purpose. The head motion information was simplified as a four-way arrow display that changed color from green to red when a composite head motion index went beyond a specified threshold. The arrow indicators were integrated into a version of the commonly used visual N-BACK task. Results suggest a significant suppression of head motion consistently in all subjects while the influence on task performance and brain activation was minimal. It is proposed that under certain experimental conditions, voluntary head motion suppression may feasibly be employed without significant compromise of fMRI data.
展示了一种利用向受试者反馈其自身头部运动信息的自愿性头部运动抑制方法。为此，在标准磁共振成像硬件上开发了一种实时功能磁共振成像系统。头部运动信息被简化为一个四路箭头显示，当复合头部运动指数超过指定阈值时，箭头颜色从绿色变为红色。箭头指示器被整合到常用的视觉N-回溯任务版本中。结果表明，所有受试者的头部运动均得到了显著抑制，而对任务表现和大脑激活的影响最小。研究表明，在某些实验条件下，自愿性头部运动抑制可以切实可行地应用，而不会对功能磁共振成像数据造成显著影响。
