Skin Dosimetry
Mostrando 1-12 de 13 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. Reconstrução de objetos simuladores segmentados aplicáveis à dosimetria de pele / Reconstruction of voxel phantoms for skin dosimetry
A radioterapia é uma modalidade terapêutica que utiliza radiações ionizantes para erradicar as células neoplásicas do organismo humano. Um dos requisitos para o sucesso desta metodologia de tratamento está na utilização adequada dos sistemas de planejamento, os quais, dentre outras informações, estimam a dose a ser administrada aos pacientes. Atua
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2010
-
4. Projeto e construção de placas espalhadoras e degradadoras de energia para uso em radioterapia com feixes de elétrons para doenças de pele / Project and construction of energy degrading and scattering plates for electron beam radiotherapy for skin diseases
There are many radiosensitive epidermotropics diseases such as mycosis fungoids and the syndrome of Sézary, coetaneous neoplasics originated from type T lymphocytes. Several studies indicate the eradication of the disease when treated with linear accelerators emitting electron beams with energies between 4 to 10 MeV. However, this treatment technique presen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/06/2010
-
5. Análise dosimétrica de fontes de radiação para uso de lesões dermatológicas / Dosimetric analysis of radiation sources for use dermatological lesions
As lesões dermatológicas submetidas à terapia com fontes de radiação podem apresentar diferentes padrões de malignidade. Os tumores de pele mais comumente encontrados nos serviços de radioterapia são os carcinomas. A radioterapia de lesões dermatológicas é realizada com feixes de radiação de baixa penetração como os raios-X de ortovoltagem, fe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2010
-
6. Development of an optical fluorescence imaging system for medical use / Desenvolvimento de um sistema por imagem de fluorescência óptica para uso médico-odontológico
Optical fluorescence has been applied to several medical areas, as to monitor drug degradation and cancer detection, due to its high sensitivity, simplicity and fast response. Non-invasive and non-destructive assessment of tissues using this technique is very attractive for clinical diagnosis. Hence, the aim of was the development of an optical fluorescence
Publicado em: 2010
-
7. Ferrous Xylenol Gel measurements for 6 and 10 MV photons in small field sizes
The Fricke dosimeter is a ferrous sulfate aqueous solution that, when irradiated, oxidizes the Fe2 + ions to Fe3 + . This new concentration, generally determined through spectrophotometry, is directly proportional to the ionizing radiation absorbed energy. The Fricke Xylenol Gel dosimeter (FXG) was developed through the incorporation of swine skin gelatin an
Brazilian Journal of Physics. Publicado em: 2007-09
-
8. "Estudos espectroscópicos e citotóxicos do Photogem® fotodegradado e dos fotoprodutos formados pela irradiação com laser" / "Spectroscopics and cytotoxics studies of Photogem® photodegradate and of photoproducts formated by irradiation with laser"
Photodynamic therapy (PDT) is a technique for inducing tumor tissue damage following administration of a drug that can be selectively retained in malignant tissue and produce singlet oxygen when irradiated in adequate wavelengths in the presence of molecular oxygen. Photosensitizers of porphyrin type can be degraded by light (photobleaching), modifying the c
Publicado em: 2006
-
9. Avaliação da exposição de trabalhadores a agrotoxicos : contribuições para a realização da dosimetria passiva pelo metodo do corpo total e monitoramento biologico
Exposure assessment is the step which knowledge is essential for the risk assessment. Exposure assessment is the estimate or quantification of the contact of chemical agents with the outer part of the organism. To the knowledge of exposure one needs appropriate instruments based on validated methodology. Passive dosimetry allows the quantification of chemica
Publicado em: 2005
-
10. Dosimetric evaluation in panoramic and teleradiography procedures / AvaliaÃÃo DosimÃtrica em procedimentos de Radiografia PanorÃmica e Teleradiografias
The present work had as an objective to evaluate the skin surface entrance dose in panoramic and teleradiography procedures in three clinics in Recife - Pernambuco - Brazil, and to contribute with data for the determination of reference levels for supercited extraoral procedures, for this purpose, operational conditions in 3 clinics were evaluated in Recife,
Publicado em: 2004
-
11. SupressÃo seletiva da luminescÃncia de nanofilmes de complexos de lantanÃdeos induzida por radiaÃÃo UV - n-domo: um dosÃmetro molecular
In this work we have developed a new product, a molecular nanofilm, with photonic properties, from which we have developed a dosimetric device for UV radiation, characterized by its unique behaviour, as well as by its selectivity, sensitivity and compactability. The active part of the dosimeter, so called âMolecular Nanodosimetersâ, is composed of a lumine
Publicado em: 2003
-
12. Phage display of ScFv peptides recognizing the thymidine(6–4)thymidine photoproduct
Solar ultraviolet (UV) radiation induces DNA photoproducts in skin cells and is the predominant cause of human skin cancers. To understand human susceptibility to skin cancer and to facilitate the development of prevention measures, highly specific reagents to detect and quantitate UV-induced DNA adducts in human skin will be needed. One approach towards thi
Oxford University Press.