Thermoluminescent Dosimetry
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. 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
-
2. 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
-
3. 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
-
4. 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
-
5. 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
-
6. 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
-
7. 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
-
8. SÃntese e caracterizaÃÃo da alumina para dosimetria termoluminescente
Carbon-doped aluminum oxide (J-Al2O3:C) is an important material for the dosimetry of ionizing radiation using a thermoluminescent readout. This material presents a sensibility to radiation that is 50 times more sensitive than LiF:Mg,Ti. However, its fabrication usually employs crystal growing methods and high temperature laboratory infra-structure and highl
Publicado em: 2008
-
9. Assessment of radiotherapic treatments with thermoluminescent dosimetry / Verificação de tratamentos radioterápicos diversos com dosimetria termoluminescente
The last decades noticed a massive improvement in radiotherapy techniques and the use of segmented beams produced by multileaf collimators. However, the dose radiation therapy planning systems (TPS) in use are characterized by the restriction of access to the calculation algorithms. The aim of this work was to compare dose values measured in an anthropomorph
Publicado em: 2007
-
10. Dose de radiação ionizante decorrente do uso de fertilizantes agrícolas / Ionizing radiation dose due to the use of agricultural fertilizers
Among several agents that exist in the environment which can expose us to different risks and effects, there is the ionizing radiation whose knowledge of dose is of importance to the effective control and prevention of possible damages to human beings and to the environment. The transfer of radionuclides from fertilizers to/and soils to the foodstuffs can re
Publicado em: 2007
-
11. Métodos para implementação da dosimetria in vivo (dose de entrada) com dosímetros termoluminescentes na radioterapia externa com feixe de fóton / Methods for implementation of in vivo dosimetry (entrance dose) using thermoluminescent dosimeters during radiotherapy treatment with photon beam
Neste trabalho, estão descritos os métodos de seleção, calibração e de determinação dos fatores de correção, as características físicas dos dosímetros termoluminescentes, o procedimento de cálculo para converter a leitura do dosímetro em dose absorvida e a metodologia para se determinar a dose de entrada. Foram investigadas a praticidade e a u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/11/2006
-
12. SEMI-EMPIRICAL SIMULATION OF THERMOLUMINESCENT RESPONSE UNDER DIFFERENT FILTER GEOMETRIES / "Simulação semi-empírica da resposta termoluminescente sob diferentes geometrias de filtro"
Many thermoluminescent materials has been developed and used for photon personal dosimetry but no one has all desired characteristics alone. These characteristics include robustness, high sensitivity, energy photon independence, large range of photon energy detection, good reproductibility, small fading and simple glow curve with peaks above 150oC. Calcium S
Publicado em: 2006