[The use of CT in oncologic radiotherapy (author's transl)].

The authors report their three-years experience on the use of CT in oncologic radiotherapy. They present 10 typical cases, using both brain and total body CT, in order to show the main relationships between CT and radiotherapy of deep tumors: 1) more careful oncologic diagnosis; 2) correct geometric approach to treatment planning; 3) good control of treatment, conforming the target-volume to the reduction in size of the tumor; 4) post-radiotherapeutic follow-up.