Dumoulin C L, Hart H R
General Electric Corporate Research and Development Center, Schenectady, New York.
Acta Radiol Suppl. 1986;369:17-20.
Magnetic resonance angiography (MRA) provides a means to visualize vessel structure without the use of contrast agents and consequently without the risks and discomfort associated with contrast media. We have developed a flow encoding procedure which exploits the spatial dependence in the phase of spin magnetization generated by a gradient pulse. This technique yields image information for only those spins having macroscopic motion (i.e. flowing blood). Excellent suppression of non-moving spins can be obtained despite the overwhelming abundance of stationary spins. Data are presented in a projection format similar to that of traditional subtraction angiography.
磁共振血管造影（MRA）提供了一种无需使用造影剂就能可视化血管结构的方法，因此避免了与造影剂相关的风险和不适。我们开发了一种流动编码程序，该程序利用梯度脉冲产生的自旋磁化相位中的空间依赖性。这种技术仅为那些具有宏观运动（即流动血液）的自旋产生图像信息。尽管静止自旋数量众多，但仍可对其进行出色的抑制。数据以类似于传统减法血管造影的投影格式呈现。
