Calibration of a clinical beta therapy applicator using the thermoluminescence samples

• Autor(a) principal: LITVAC, DANIEL
• Data de Publicação: 2020
• Outros Autores: CALDAS, LINDA V.E., CONGRESSO BRASILEIRO DE METROLOGIA, 10.; CONGRESSO INTERNACIONAL DE METROLOGIA EL??TRICA, 13.; CONGRESSO INTERNACIONAL DE METROLOGIA MEC??NICA, 5.; CONGRESSO BRASILEIRO DE METROLOGIA DAS RADIA????ES IONIZANTES, 6.; WORKSHOP DA REDE DE METROLOGIA QU??MICA DO INMETRO, 4.; CONGRESSO BRASILEIRO DE METROLOGIA ??PTICA, 3.
• Tipo de documento: Artigo de conferência
• Título da fonte: Repositório Institucional do IPEN
• Texto Completo: http://repositorio.ipen.br/handle/123456789/30987
• topic: beryllium oxides; lithium fluorides; beta particles; calibration; comparative evaluations; dosimetry; radiation sources; therapy; thermoluminescence

In some parts of Brazil, 90Sr/90Y clinical applicators are still used for dermatological and ophthalmic treatments, even with the higher efficiency of linear accelerators because they are of lower cost and easier use. Calibration and periodic recalibration of these applicators to verify the absorbed dose rate is essential to ensure accuracy in clinical treatments. In this work the thermoluminescent response of BeO and ??LiF pellets was evaluated, determining the reproducibility, linearity of response and their dose-response curves. This standard, for this type of calibration, recommends the use of small detectors such as ??LiF. Therefore, the utility of ??LiF and BeO in the calibration of clinical applicators was compared.