In a book the questions of radiation defence of personnel and patients are examined during realization of radial therapy in oncologic establishments. Appearance in the radiological clinics of the new hi-tech linear accelerating of electrons put new tasks before radiation defence of patients and personnel. Presently substantially the pre-radial preparation of patients, sent to the choice of terms of irradiation, became complicated tumours with eaten up the diminished doses in surrounding them normal fabrics and critical organs. Required high exactness of tricking into of dose to the tumour hearths, verification of dose distributions. Procedures of control of quality of accelerating applied for the irradiation of patients became complicated. Accordingly procedures of radiation control of irradiation of patients became complicated.To the monographs the divisions devoted are driven to the methods of estimation of the doses got patients at the controlled from distance and pin irradiation, storage and use of the dosimetric information related to descriptions of vehicles. Paid attention to guarantee and audit of quality of radial therapy. The questions of organization and skilled providing of work of физико-технического personnel are considered in the separations of radial therapy. The role of medical physicists is appraised in-process separations. It is spared attention to the emergency irradiation. The legal problems of radial therapy are first considered.A monograph is intended for medical physicists and engineers of separations of radial therapy, radiation security of clinics services, and also for radiation oncologists, teachers, engaging in training of personnels for medical radiology and radiation safety, students of higher technical and medical educational establishments.