Comisionamiento y puesta en marcha del equipo de braquiterapia de alta tasa de dosis (microselectron) en la Unidad de Radioterapia del Hospital Carlos Andrade Marín, para tratamiento de pacientes con cáncer Ginecológico.

Abstract

The objective was to commission and implement the high dose rate of brachytherapy equipment (microSelectron) of Carlos Andrade Marín Hospital Radiotherapy Unit for the treatment of patients with gynecological cancer. A report was made by Task Group N.43 of the American Association of Physicists in Medicine (AAPM), TECDOC 1151 report based on physical aspects of quality assurance in radiotherapy: Quality control protocol of the International Atomic Energy Agency (IAEA), and the microSelectron-HDR user manuals. The microSelectron-HDR, the well chamber, radiation detectors, electrometer, conduction guides for the measurements were used, through the TECDOC 1151 and the Manual of High Rate of Brachytherapy (BATD) of de National Cancer Institute (INCA) –Brazil. Taking into account the positioning of measuring instruments and various factors such as sensitivity, leakage radiation, reproducibility and repeatability, among others. Later, the dosimetric set equipment was calibrated by using the Linear Accelerator Synergy with an energy of 6MV and 100 UM; continuing with the determination of necessary tests for the equipment quality control of high dose rate. The error obtained after calibrating the source of Iridium 192 by means of the well chamber was 3% tolerance of ±1 with respect to the positioning of the source with radiographic film and time of permanence of the source a tolerance of ±0.5 with respect to control charts indicating the process stability. It is concluded that the microSelectron-HDR is ready for clinical use in the treatment of patients with gynecological cancer, because it complies with all the parameters recommended by the international protocols. It is recommended to use the results of this work as reference if it is necessary to perform a quality control of the equipment to verify its functionality and limits of tolerance.