Avaliação da dose de radiação absorvida em exames radiológicos durante o planejamento radioterápico

• Ano de defesa: 2014
• Autor(a) principal: Camargo, Rafaela Ferraz de [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Radiação - Dosagem; Radiação ionizante; Radioterapia; Exposição a radiação; Radiation Dosage
• Link de acesso: http://hdl.handle.net/11449/113880

Radiotherapy is a medical modality that uses ionizing radiation for the treatment of diseases. The treatment success depends on several factors, including the precise release of the radiation dose in the tumor volume and the perfect daily reproducibility of the guidelines prescribed in the technical sheet of the patient. The delimitation of the radiation field, which should cover the entire tumor and allow a safety margin that considers the anatomical movement, is taken during the procedures of the radiotherapy planning. At this stage of treatment, the radiotherapist physician, aided by the medical physicist and the technologist in radiology, utilizes radiographic techniques through a system of scopy to visualize the target volume of irradiation, and performs static radiographic images to document the clinical case. In the routine of the radiotherapy planning procedures, usually is not performed the quantification of the radiation dose released in the procedure, mainly due to the large and exhaustive schedule of activities of the professionals involved. In this study, was assessed the radiation dose released in radiological examinations performed during the radiotherapy planning, evaluating the influence of this dose in the exposures total in which the patient has undergone throughout the radiotherapeutic procedure. The research consisted in monitoring the radiotherapy planning procedures performed at UNESP, “Serviço Técnico de Radioterapia” of “Faculdade de Medicina de Botucatu”, extracting the radiographic technique values used for different plannings. After the individualized characterization of the plannning, the radiographic techniques used in each clinical case, were repeated and the radiation doses released in the procedure were quantified by specific radiation detectors and they were calibrated to the energy of the simulation x-ray. It is concluded that the absorbed radiation dose, which ...