RESUMEN
The paper is concerned with the comparison and discussion of the characteristics of dose distributions formed by the linear and point sources of gamma-radiation with radionuclides 60Co, 137Cs and 192Ir using different methods of intracavitary irradiation. Insignificant influence of the energy of the radiation of these sources on differences in a dose and distance decrease was shown. Recommendations for the choice of a rational method of the dose distribution formation for intracavitary gamma-therapy were issued.
Asunto(s)
Braquiterapia/métodos , Radioisótopos/uso terapéutico , Radioisótopos de Cesio/uso terapéutico , Radioisótopos de Cobalto/uso terapéutico , Rayos gamma , Iridio/uso terapéutico , Dosificación RadioterapéuticaRESUMEN
The intracavital moving and multipositional irradiation with portable sources in gamma-therapy of extended pathologic foci offers more possibilities for the formation of dose distribution in accordance with the patient's individual features. A method is proposed to calculate the movement law for the point and linear irradiation sources following the preset dose distribution. The authors show possible formation of dose fields with a practically rectilinear isodose portion.