[Dosimetric analysis of radiation treatment methods in cancer of the middle 3rd of the esophagus using the Rokus gamma apparatus].

By means of an electronic computer various standard technics of irradiation for cancer of the middle esophagus are compared as to the basic dosimetry range with the schedule of irradiation, calculated according to the program of the optimum dosimetry level. The criterion of the optimum dosimetry level was the requirement of a minimum integral dose in patient's body under even irradiation of the tumor zone (circular area with a diameter of 6 cm) but not less than 80% of the dosage in the esophagus center. The technics under stude show that rotation irradiation through 360 degrees provide the nearest approximation to the optimum regime.