Liu K, Lee D H, Rutt B K
The Tom Lawson Family Imaging Research Laboratories, John P. Robarts Research Institute, London, Ontario, Canada.
J Magn Reson Imaging. 1998 Jul-Aug;8(4):912-23. doi: 10.1002/jmri.1880080422.
In comparison with the conventional three-dimensional multiple overlapped thin slab acquisition (MOTSA) for magnetic resonance angiography (MRA), we have developed a novel sliding interleaved kY (SLINKY) acquisition technique, which can eliminate the slab boundary artifact (SBA) or venetian blind artifact without any a priori knowledge of blood flow. This work addresses the systematic assessment and evaluation of the SLINKY technique and verifies the advantages of SLINKY in the following several aspects: (a) scan time efficiency; (b) signal-to-noise ratio (SNR), and signal-difference-to-noise ratio (SDNR); (c) sensitivity to flow velocity range; (d) sensitivity to flow direction; (e) signal loss in slow/reversal flow regions; and (f) reconstruction efficiency and feasibility. Both phantom and in vivo experiments verify the clinical significance of the technique. The new MRA images acquired with this imaging technique in 31 volunteer/patient examinations show highly reliable mapping of vascular morphology without the SBA and reduction of signal voids in complex/slow flow regions.
与用于磁共振血管造影（MRA）的传统三维多重重叠薄板采集（MOTSA）相比，我们开发了一种新颖的滑动交错kY（SLINKY）采集技术，该技术无需任何血流先验知识即可消除薄板边界伪影（SBA）或百叶窗伪影。这项工作对SLINKY技术进行了系统评估，并在以下几个方面验证了SLINKY的优势：（a）扫描时间效率；（b）信噪比（SNR）和信号差噪比（SDNR）；（c）对流速范围的敏感性；（d）对流动方向的敏感性；（e）慢/逆流区域的信号损失；以及（f）重建效率和可行性。模型实验和体内实验均验证了该技术的临床意义。在31例志愿者/患者检查中，用这种成像技术采集的新MRA图像显示出高度可靠的血管形态映射，没有SBA，并且减少了复杂/慢血流区域的信号缺失。
