VICENTE DE PAULO DE CAMPOS
15 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 15
Artigo IPEN-doc 29523 Characterization of the reproducibility of LiF:Mg, Ti dosimeters and the radiator system in the quantity Hp(0.07)2022 - NASCIMENTO, G.; CAMPOS, L.L.; CAMPOS, V.P.Resumo IPEN-doc 29165 Assessment of energy and angular dependence of LiF:Mg,Ti dosimeters irradiated in the quality Hp(0.07)2022 - NASCIMENTO, G.G.; SILVA, C.R.; CAMPOS, V.P.; CAMPOS, L.L.Resumo IPEN-doc 29151 Avaliação da resposta TL em função da dose de dosímetros de LiF:Mg, Ti na grandeza Hp(0,07) utilizando o rod phantom2022 - NASCIMENTO, GABRIEL G. do; CAMPOS, VICENTE de P. de; RODRIGUES, LETICIA L.C.Os dosímetros são utilizados para quantificar a dose que o indivíduo ocupacionalmente exposto recebe durante seu período de atividades. O dosímetro de extremidade tem a finalidade de quantificar a dose em uma região específica do corpo, as mãos. Para um dispositivo ser utilizado como dosímetro, ele deve passar por alguns testes de calibração/caracterização, entre eles, o teste de resposta em função da dose, onde o dosímetro é irradiado com diferentes doses no intervalo de interesse recomendado, preferencialmente, deverá apresentar um padrão linear de resposta em função das doses utilizadas. O Hp(0,07) é uma grandeza operacional estabelecida para monitoração individual externa, sendo 0,07 mm a profundidade adotada. Neste trabalho as irradiações foram realizadas na grandeza Hp(0,07) utilizando um rod phantom, com o objetivo de avaliar a resposta TL em função da dose, aplicando os dosímetros de LiF:Mg, Ti.Artigo IPEN-doc 28190 Characterization and calibration of thermoluminescent dosimeters of LiF:Mg, Ti in the quantity Hp(0.07)2021 - NASCIMENTO, G.; CAMPOS, V.; CAMPOS, L.Resumo IPEN-doc 26072 Analise dosimétrica de um laboratório de radiobiodistribuição in vivo usando CaSO4:Dy2019 - CAMPOS, R.F.; CAMPOS, V.P.; MITAKE, M.B.; ARAUJO, E.B.Artigo IPEN-doc 24780 Performance of TL and OSL techniques using CaSO4 and Al2O3 dosimeters for mean glandular dose (MGD) and entrance surface skin dose (ESD) determination in a digital mammographic unit as alternative dosimeters2019 - ROCHA, F.D.G.; VILLANI, D.; CAMPOS, V.P.; NOGUEIRA, M.S.; GOULART, M.E.; SICHITO, V.A.; CAMPOS, L.L.The mammography is the most important and simple tool in the diagnosis of breast diseases in women. In digital mammography, the process of image acquisition, display and storage are separated which allows optimization of each. Despite the innumerous advantages of this technique, such as an accurate diagnosis for women with dense breast, it was noticed an increase of radiation doses to obtain the images by this system. As with any examination that includes x-rays, there is always a small stochastic risk of inducing cancer, it is therefore important to evaluate the risk from the dose delivered to the patient during the screening process. The mean glandular dose within the breast is the recommended quantity to evaluate the risk from radiation to the breast. To guarantee proper conditions of protection for patients, the radiation dose should be as low as reasonably achievable possible and simultaneously compatible with image quality requirements. Thus, this work proposes the use of the thermoluminescent (TL) CaSO4:Dy sintered discs, produced at IPEN, widely used in individual, environmental and area monitoring in Brazil, and Al2O3:C optically stimulated luminescence (OSL) ‘dot’ dosimeters, manufactured by Landauer® Inc., as application as easy-to-use and low cost alternative dosimeters to evaluate the entrance skin doses (ESD) delivered to patients, the half value layer (HVL) and the mean glandular doses (MGD) in a mammographic digital unit, comparing these two techniques with the results obtained using an Allin- one QC meter. The results obtained demonstrated that the TL and OSL dosimetry systems and the CaSO4 and Al2O3 dosimeters used are able to evaluate the entrance skin dose as well as mean glandular doses in a digital mammographic unit accurately within the requirements, and they can be considered a practical, simple, easy-touse and low cost tools for verification of these items in a Quality Assurance Program.Resumo IPEN-doc 23265 Performance of TL and OSL techniques using CaSO4 and Al2O3 Dosimeters for Mean Glandular Dose (MGD) and Entrance Surface Skin Dose (ESD) determination in a digital mammographic unit as alternative dosimeters2017 - ROCHA, FELICIA D.G.; VILLANI, DANIEL; CAMPOS, VICENTE de P. de; NOGUEIRA, MARIA do S.; GOULART, MAURICIO E.; SICHITO, VALTER; CAMPOS, LETICIA L.The mammography is the most important and simple tool in the diagnosis of breast diseases in women. In digital mammography, the process of image acquisition, display and storage are separated which allows optimization of each. Despite the innumerous advantages of this technique, such as an accurate diagnosis for women with dense breast, it was noticed an increase of radiation doses to obtain the images by the new system. As with any examination that includes x-rays, there is always a small stochastic risk of inducing cancer. It is therefore important to evaluate the risk from the dose delivered to the patient during the screening process. The mean glandular dose within the breast is the recommended quantity to evaluate the risk from radiation to the breast. To guarantee proper conditions of protection for patients, the radiation dose should be as low as reasonably achievable possible and simultaneously compatible with image quality requirements. Thus, this work proposes the use of the thermoluminescent (TL) CaSO4:Dy sintered discs, produced at IPEN, widely used in individual, environmental and area monitoring in Brazil, and Al2O3:C optically stimulated luminescence (OSL) ‘dot’ dosimeters, manufactured by Landauer® Inc., as application as easy-to-use and low cost alternative dosimeters to evaluate the entrance skin doses (ESD) delivered to patients, the half value layer (HVL) and the mean glandular doses (MGD) in a mammographic digital unit, comparing these two techniques with the results obtained using an All-in-one QC meter. The results obtained demonstrated that the TL and OSL dosimetry systems and the CaSO4 and Al2O3 dosimeters used are able to evaluate the entrance skin dose as well as mean glandular doses in a digital mammographic unit accurately within the requirements, and they can be considered a practical, simple, easy-to-use and low cost tools for verification of these items in a Quality Assurance Program.Resumo IPEN-doc 23811 Assessment of Entrance Surface Skin Dose (ESD) and Mean Glandular dose (MGD) in a Digital Mammographic Unit comparing the TL and OSL techniques2016 - ROCHA, FELICIA; VILLANI, DANIEL; CAMPOS, VICENTE; NOGUEIRA, MARIA do S.; GOULART, MAURICIO; SICHITO, VALTER; CAMPOS, LETICIAArtigo IPEN-doc 10960 Avaliacao do limite de repetitividade e de deteccao de dosimetros de CaSOsub(4):Dy2004 - CAMPOS, V.P.; DOI, M.S.; MANZOLI, J.E.Artigo IPEN-doc 11932 Leaked filters for energetic an angular dependence corrections of thermoluminescent response2007 - MANZOLI, JOSE E.; CAMPOS, VICENTE de P. de; SHAMMAS, GABRIEL I.J.