Chien D, Saloner D, Laub G, Simonetti O, Anderson C M
Department of Radiology, University of California-San Francisco.
Magn Reson Med. 1994 Nov;32(5):661-7. doi: 10.1002/mrm.1910320517.
We have implemented a high speed method for cardiac-triggered blood velocity quantification within a single breath hold on a conventional MR system. The method, based on bolus tagging, was tested using a pulsatile flow phantom and evaluated in vivo. The image acquisition time was reduced by a factor of N by acquiring N phase encode lines per bolus tag application. The clarity of the flow tag was found to vary with how k-space was covered during data collection. The technique was optimized and multiple bolus tag images were obtained throughout the cardiac cycle within a single breathold.
我们已经在传统磁共振系统上实现了一种在单次屏气期间进行心脏触发血流速度定量的高速方法。该方法基于团注标记，使用脉动流模体进行了测试，并在体内进行了评估。通过每次团注标记应用采集N条相位编码线，图像采集时间缩短了N倍。发现流标记的清晰度随数据采集期间k空间的覆盖方式而变化。对该技术进行了优化，并在单次屏气的整个心动周期内获得了多个团注标记图像。
