Controle de Qualidade na Troca da Fonte de Braquiterapia de Alta Taxa De Dose

Abstract

The efficacy of brachytherapy treatments is directly related to the radiation dose administered. Large discrepancies between the dose prescribed by the doctor and the dose received by the patient can significantly increase the risk of damage to healthy tissues or reduce the likelihood of successful tumor control. Therefore, it is essential that brachytherapy treatments present minimal variations in dose in order to ensure control of treatment. Iridium 192 sources, commonly used in high-dose rate brachytherapy services, must undergo a calibration procedure before being used in treatments. This is just one of the procedures necessary to ensure that patients receive prescribed dose. This paper describes the calibration procedures for using the Ir-192 source using the well-type chamber, in addition to the practical evaluation of the procedures adopted by the Cancer Hospital of the Universidade Federal de Uberlândia (HC-UFU/EBSERH). An analysis was performed based on the protocols established by the regulatory agencies, verifying that both the source and the procedures comply with the applicable specifications for the proper functioning of the radiotherapy service. It was also highlighted the importance of the step as a quality control stage, to ensure precision in the administered dose during treatments, thus contributing to the safety and efficiency of brachytherapy treatments.The efficacy of brachytherapy treatments is directly related to the radiation dose administered. Large discrepancies between the dose prescribed by the doctor and the dose received by the patient can significantly increase the risk of damage to healthy tissues or reduce the likelihood of successful tumor control. Therefore, it is essential that brachytherapy treatments present minimal variations in dose in order to ensure control of treatment. Iridium 192 sources, commonly used in high-dose rate brachytherapy services, must undergo a calibration procedure before being used in treatments. This is just one of the procedures necessary to ensure that patients receive prescribed dose. This paper describes the calibration procedures for using the Ir-192 source using the well-type chamber, in addition to the practical evaluation of the procedures adopted by the Cancer Hospital of the Universidade Federal de Uberlândia (HC-UFU/EBSERH). An analysis was performed based on the protocols established by the regulatory agencies, verifying that both the source and the procedures comply with the applicable specifications for the proper functioning of the radiotherapy service. It was also highlighted the importance of the step as a quality control stage, to ensure precision in the administered dose during treatments, thus contributing to the safety and efficiency of brachytherapy treatments.