[The possibility of side effects during the application of roentgenologic contrast media by the method of the biphasic bolus/perfusor injection and the monophasic bolus injection (author's transl)].

In spite to lower the dose dependent side effects by the application of roentgenologic contrast media in the computed tomography a system of a biphasic injection per bolus and perfusor was installed and compared with that of the monophasic bolus injection. Special rules on the installation of the perfusor at CT should be observed.