Computed tomography of superior vena cava obstruction.

Which imaging procedure is best for the diagnosis of the superior vena cava (SVC) syndrome is subject to considerable debate. Available imaging procedures include the plain chest film, SVC phlebography, scintiangiography, digital phlebography, CT digital phlebography, and CT. In our experience the combined technique of contrast enhanced CT axial images, followed by a CT digital phlebogram, is the most informative, cost-effective, and least invasive method available.