[Contribution to the study of angio-TC: timing of exposure and subsequent venous lavage].

The text reports the results of angio-CT examinations performed with single intravenous injections of small amounts of contrast medium and with the technique of timing of exposure and immediate venous flush with the use of a suitable injector (168 patients have been examined, in 157 of them the timing was correct while in 11 the timing was not adequate). The exposure is made after a certain period of time from the moment of the injection, corresponding to the number of heart cycles the contrast medium needs to reach the considered arterial district, during its first passage. The immediate venous flush allows one to use almost all the contrast medium to obtain the information and to take advantage of an almost compact bolus. The principal advantages of this technique are that a smaller amount of contrast medium and of radiation dose to the patient can be used.