Walker M F, Souza S P, Dumoulin C L
General Electric Corporate Research and Development Center, Schenectady, NY 12301.
J Comput Assist Tomogr. 1988 Mar-Apr;12(2):304-13. doi: 10.1097/00004728-198803000-00021.
The quantitative nature of phase contrast magnetic resonance angiography is explored, and a technique of blood flow measurement that is independent of system and patient parameters is presented. Phantom and patient studies demonstrate that quantitative flow measurements by phase contrast angiography can be routinely obtained with good accuracy despite nonuniform sensitivity profiles, blood flow pulsatility, and patient-to-patient changes in system gain. The calibration method requires the acquisition of only two flow images and thus can be performed as part of an angiographic session. Flow calibration of any flow profile can be accomplished with this technique. The solutions for plug flow and parabolic flow are presented.
探索了相位对比磁共振血管造影的定量特性，并提出了一种独立于系统和患者参数的血流测量技术。体模和患者研究表明，尽管存在灵敏度分布不均匀、血流搏动以及患者间系统增益变化等情况，通过相位对比血管造影进行定量血流测量仍可常规获得良好的准确性。校准方法仅需采集两幅血流图像，因此可作为血管造影检查的一部分来执行。利用该技术可完成任何血流剖面的流量校准。给出了塞状流和抛物线流的解决方案。
