In May 1998, the German "Concerted Action Dose Reduction in CT" was founded by all parties involved in CT. Its intention was to achieve a significant reduction of the radiation exposure caused by CT, a matter that has increasingly been considered a major challenge since the early nineties. As a result of a number of joint efforts, the essential preconditions have been established by now. The fifth anniversary of the Concerted Action gave rise for both retrospection and outlook on the tasks that have already been accomplished and those that still need to be done. For this purpose, a one-day symposium took place in Berlin on November 4, 2003. The contents of a total of 18 contributions will be outlined here in brief.
The hepatobiliary sequential-scintigraphy is a nuclear diagnostic procedure useful in assessing the function of liver and biliary system. 40 patients with and 20 patients without complains following cholecystectomy were examined. The value of this method in establishing biliary causes for such complains is demonstrated by typical cases. Simplicity and safety in application as well as diagnostic sensitivity should place the method in the first place evaluating postcholecystectomy complains. Succeeding indirect and direct radiologic techniques then may be used systematically with benefit for the patient and physician. Results indicate, that the procedure will be essential as well in evaluation as in analysis of nature and frequency of such complains by its superior presentation of intrahepatic bilestasis and functional mechanisms of the biliary system including the sphincter of Oddi.
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