Serfaty J M, Yang X, Aksit P, Quick H H, Solaiyappan M, Atalar E
Department of Radiology and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland 21287-0845, USA.
J Magn Reson Imaging. 2000 Oct;12(4):590-4. doi: 10.1002/1522-2586(200010)12:4<590::aid-jmri11>3.0.co;2-3.
The success of x-ray fluoroscopy-guided coronary catheterization depends in part on the ability to obtain simultaneous and real-time visualization of the guidewire, guiding catheter, and anatomy of the chest. The hypothesis explored in this paper is that magnetic resonance imaging (MRI) could provide this ability. This hypothesis was tested with loopless antennas used as the guidewire and a guiding catheter and two surface coils, each connected to four different receiver channels of a GE 1.5-T CV/I MRI scanner. Experiments were conducted on six healthy dogs. Intravascular antennas were inserted in the right carotid artery and maneuvered in the aorta while running a fast gradient-echo sequence (TR/TE 5/1.3 msec, flip angle 7 degrees). Real-time projection images of the chest anatomy, together with the guidewire and guiding catheter, were obtained. Positioning of the MRI guiding catheter either in the descending aorta, ascending aorta, or heart was achieved easily. This study represents a step toward MRI-guided coronary catheterization.
X射线荧光透视引导下的冠状动脉导管插入术的成功部分取决于能否同时实时显示导丝、引导导管以及胸部的解剖结构。本文探讨的假设是磁共振成像（MRI）能够提供这种能力。使用无环天线作为导丝和引导导管，并使用两个表面线圈，每个线圈连接到GE 1.5-T CV/I MRI扫描仪的四个不同接收通道，对这一假设进行了测试。在六只健康犬身上进行了实验。将血管内天线插入右颈动脉并在主动脉中操作，同时运行快速梯度回波序列（TR/TE 5/1.3毫秒，翻转角7度）。获得了胸部解剖结构以及导丝和引导导管的实时投影图像。很容易将MRI引导导管定位在降主动脉、升主动脉或心脏中。这项研究朝着MRI引导的冠状动脉导管插入术迈出了一步。
