[Technique for postoperative irradiation of patients with breast cancer using electron and cobalt beams]

The method of chest wall and mammary lymph node irradiation using obliquely incident electron beams is presented. Dose distributions measured in Rando phantom and calculated by computer programme are discussed. The conditions for geting homogenous dose distribution within the target volume are given. The use of this technique is limited by the degree of curvature of the chest wall and depth of tumour volume where maximum obliquity occurs. In order to minimize the lung irradiation the use of compensating boluses is recommended.