Wentz K U, Röther J, Schwartz A, Gückel F, Rautenberg W, Jaschke W, Mattle H P, Suchalla R, Georgi M
Institut für Klinische Radiologie, Universität Heidelberg.
Rofo. 1992 Feb;156(2):120-4. doi: 10.1055/s-2008-1032849.
MR angiography (MRA) combined with selective saturation techniques has proved to be a reliable method for the determination of flow direction and vascular supply at the level of the circle of Willis. We describe its application to the vertebrobasilar system (VBS) in ten volunteers and five patients with abnormal findings. In one patient with postsurgical stenosis of the brachiocephalic artery, reverse flow of the vertebral artery (VA) was demonstrated. Collateral blood flow from the anterior circulation over the posterior communicating arteries was shown in three patients with bilateral vertebral or proximal basilar artery occlusion. Due to increase of pressure during contrast injection into the contralateral VA, DSA showed reverse flow of a dissected VA in one patient. MR flow determination as well as TCD proved antegrade flow. All results correlated with both DSA and transcranial Doppler (TCD). The technique is little time consuming and is a promising add-on examination to conventional and MRA imaging of the VBS.
磁共振血管造影（MRA）结合选择性饱和技术已被证明是确定 Willis 环水平血流方向和血管供应的可靠方法。我们描述了其在 10 名志愿者和 5 名有异常发现的患者的椎基底动脉系统（VBS）中的应用。在 1 例头臂动脉术后狭窄的患者中，显示椎动脉（VA）有逆流。在 3 例双侧椎动脉或近端基底动脉闭塞的患者中，显示有来自前循环经后交通动脉的侧支血流。由于向对侧 VA 注射造影剂时压力增加，DSA 显示 1 例椎动脉夹层患者有逆流。MR 血流测定以及 TCD 均证明为顺行血流。所有结果均与 DSA 和经颅多普勒（TCD）相关。该技术耗时少，是对 VBS 的传统成像和 MRA 的一种有前景的补充检查。
