Wildermuth S, Debatin J F, Leung D A, Dumoulin C L, Darrow R D, Uhlschmid G, Hofmann E, Thyregod J, von Schulthess G K
Department of Medical Radiology, University Hospital Zürich, Switzerland.
Radiology. 1997 Feb;202(2):578-83. doi: 10.1148/radiology.202.2.9015094.
With use of an open 1.5-T magnetic resonance (MR) imager and a tracking catheter, the authors successfully placed the catheter into the left or right sacral artery in pigs. The tracking catheter comprised a 5.3-F percutaneous transluminal angioplasty catheter with a small copper radio-frequency coil in its tip. With use of the coil as an antenna, the catheter tip position was projected in real time onto MR angiography road maps in two planes. Guidance of placement of the catheter with the MR angiography road maps allowed successful embolization, balloon occlusion, and transjugular intrahepatic puncture of the portal system. Specialized catheters can be tracked in vivo to allow MR guidance in intravascular interventional procedures.
作者使用一台开放式1.5-T磁共振（MR）成像仪和一根跟踪导管，成功地将导管置入猪的左或右骶动脉。跟踪导管由一根5.3-F经皮腔内血管成形术导管组成，其尖端带有一个小型铜射频线圈。利用该线圈作为天线，导管尖端位置可实时投影到两个平面的MR血管造影路线图上。借助MR血管造影路线图引导导管放置，实现了门静脉系统的成功栓塞、球囊闭塞和经颈静脉肝内穿刺。专用导管可在体内进行跟踪，以便在血管内介入操作中实现MR引导。
