Foley W D, Varma R R, Lawson T L, Berland L L, Smith D F, Thorsen K
J Comput Assist Tomogr. 1983 Feb;7(1):77-82. doi: 10.1097/00004728-198302000-00014.
The applications and limitations of contrast enhanced computed tomography (CT) in defining the extrahepatic portal system is discussed in the context of three separate cases in which the CT examination was used as an adjunct to an incomplete arterial portogram examination. Dynamic CT may be useful when excessive contrast dilution precludes the visualization of major venous structures during arterial portography. Real-time/pulsed Doppler ultrasonography is another complementary test but more limited in application than dynamic CT. Patency and flow direction in the proximal splenic vein, portal vein, and hepatic vein can be defined by the ultrasonic technique.
在三例独立病例的背景下，讨论了对比增强计算机断层扫描（CT）在界定肝外门静脉系统方面的应用及局限性，这三例中CT检查均作为不完全动脉门静脉造影检查的辅助手段。当动脉门静脉造影期间对比剂过度稀释导致主要静脉结构无法显影时，动态CT可能会有所帮助。实时/脉冲多普勒超声检查是另一种辅助检查，但应用范围比动态CT更有限。超声技术可确定脾静脉近端、门静脉和肝静脉的通畅情况及血流方向。
