Thermoluminescent
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Prediction of impacts on liver enzymes from the exposure of low-dose medical radiations through artificial intelligence algorithms
SUMMARY OBJECTIVES: This study aimed to develop artificial intelligence and machine learning-based models to predict alterations in liver enzymes from the exposure of low annual average effective doses in radiology and nuclear medicine personnel of Institute of Nuclear Medicine and Oncology Hospital. METHODS: Ninety workers from the Radiology and Nuclear M
Rev. Assoc. Med. Bras.. Publicado em: 2021-02
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2. Absorbed doses in salivary and thyroid glands from panoramic radiography and cone beam computed tomography
Abstract Introduction: Panoramic radiography and cone beam computed tomography (CBCT) are very important in the diagnosis of oral diseases, however patients are exposed to the risk of ionizing radiation. This paper describes our study aimed at comparing absorbed doses in the salivary glands and thyroid due to panoramic radiography and CBCT and estimating ra
Res. Biomed. Eng.. Publicado em: 15/02/2018
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3. Evaluation of radiation protection conditions in intraoral radiology
Abstract Introduction: The dental radiology represents about 20% of human exposure to radiation in radio diagnostic. Although the doses practiced in intraoral dentistry are considered low, they should not be ignored due to the volume of the performed procedures. This study presents the radiation protection conditions for intraoral radiology in Curitiba - PR
Res. Biomed. Eng.. Publicado em: 17/05/2016
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4. Skin Doses on the Lens for Temporomandibular Joint Exam in Cone Beam Computed Tomography
ABSTRACT The aim of this study was to evaluate the kerma at the surface of the lens in TMJ CBCT and to derive the equivalent dose. An anthropomorphic phantom of the head and neck manufactured by Radiation Support Devices (model RS-230) was used. The dosimetric measurements were obtained by using fourteen thermoluminescent dosimetry (TLD) dosimeters (LiF: Mg,
Braz. arch. biol. technol.. Publicado em: 2015-12
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5. Occupational Hazard: Radiation Exposure for the Urologist Developing a Reference Standard
Introduction To date, there is a paucity of literature offering practicing urologists a reference for the amount of radiation exposure received while surgically managing urolithiasis. This study examines the cumulative radiation exposure of an urologist over 9 months. Materials and Methods We present a case series of fluoroscopic exposures of an experienc
Int. braz j urol.. Publicado em: 2013-04
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6. Desenvolvimento e estudo de materiais termoluminescentes baseados em óxido de alumínio para aplicação em dosimetria / Development and study of thermoluminescent materials based on aluminum oxide for dosimetry application
The aluminum oxide was one of the former compounds investigated with a view to detecting and measuring radiation by means of the thermoluminescence (TL). Commonly referred to as \"alumina\", aluminum oxide has interesting features for the development of materials for dosimetry. Its effective atomic number has an intermediate value between the bone and soft t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2012
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7. Avaliação de dosímetros termoluminescentes para uso em radioterapia com fótons de alta energia / Evaluation of thermoluminescent dosimeters for using in radiotherapy with high energy photons
Atualmente a maior parte dos tratamentos radioterápicos é feita através de irradiações com feixes de fótons de alta energia. Esses feixes se originam em fontes radioativas (de nuclídeos como o cobalto 60) ou são gerados em aceleradores lineares de elétrons. Para as medidas dosimétricas nesses feixes, uma das técnicas mais utilizada é a termolumin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
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8. Avaliação da resposta de detectores termoluminescentes na dosimetria de feixes clínicos utilizando diferentes objetos simuladores / Response evaluation of thermoluminescent detectors in clinical beams dosimetry using different phantoms
A radioterapia é uma das três principais modalidades de tratamento utilizadas no tratamento de doenças malignas, como o câncer; as duas outras são a quimioterapia e a radiocirurgia. Em contraste com outras especialidades médicas que necessitam principalmente de conhecimento clínico e da experiência de especialistas, a radioterapia, com o uso da radia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2010
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9. Determination of dosimetric quantities of interest in Mammography using thermoluminescent detectors. / Determinação de grandezas dosimétricas de interesse em mamografia usando detectores termoluminescentes
National and international health organizations such as the Brazilian Ministry of Health, through its Secretary of Health Surveillance establishes in the publication Nº 453/98 that in all mammographic equipments must be evaluated the entrance-skin dose through the readings of an ionization chamber-electrometer system corrected by the backscatter factor, amo
Publicado em: 2010
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10. Estudo comparativo entre métodos de calibração de aplicadores clínicos de radiação beta / COMPARATIVE STUDY AMONG CALIBRATION METHODS OF CLINICAL APPLICATORS OF BETA RADIATION
90Sr+90Y clinical applicators are instruments used in brachytherapy procedures and they have to be periodically calibrated, according to international standards and recommendations. In this work, four calibration methods of dermatological and ophthalmic applicators were studied, comparing the results with those given by the calibration certificates of the ma
Publicado em: 2009
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11. Desenvolvimento de procedimentos e metodologia de controle para aplicação de boas práticas de fabricação (BPF) na irradiação de sangue humano / Procedures development and methodology of control for application of good manufacture practices (GMP) on human blood irradiation
A irradiação do sangue humano é usada para evitar a TA-DECH (\"transfusão associada a doença do enxerto contra hospedeiro\"), um raro mas devastador efeito adverso dos leucócitos presentes em componentes de sangue de doadores. Normalmente esta prática de irradiação é executada para a eliminação física de leucócitos. A implementação de procedi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/02/2008
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12. ASSESSMENT OF CaSO4:Dy AND LiF:Mg,Ti THERMOLUMINESCENT DOSIMETERS PERFORMANCE IN THE DOSIMETRY OF CLINICAL ELECTRON BEAM / Avaliação do desempenho dos detectores termoluminescentes de CaSO4:Dy e LiF:Mg, Ti na dosimetria de feixes clínicos de elétrons
The assessment of the performance of CaSO4:Dy thermoluminescent detectors produced by IPEN in the dosimetry of clinical electron beams aims to propose an alternative to the LiF:Mg,Ti commercial dosimeters (TLD-100) largely applied in radiation therapy. The two types of thermoluminescent dosimeters were characterised with the use of PMMA, RMI-457 type solid w
Publicado em: 2008