FELIPE BELONSI DE CINTRA
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Artigo IPEN-doc 27209 Evaluation of an extrapolation chamber for dosimetry in computed tomography beams using Monte Carlo code (MCNP5)2020 - CASTRO, MAYSA C.; SILVA, NATALIA F.; SANTOS, LUCAS R.; CINTRA, FELIPE B.; CALDAS, LINDA V.E.Computed tomography (CT) is responsible for the highest dose values to the patients during the exams. Therefore, the radiation doses in this procedure must be accurate. However, there is no primary standard system for this kind of radiation beam yet. A homemade extrapolation ionization chamber was preliminary evaluated for the establishment of a CT beam primary standard. The aim of this study was to determine the influence that the various components of the extrapolation chamber may present on the energy deposited in its sensitive volume. Different materials for its collecting electrode were also studied for this type of radiation beam. The evaluation of the homemade extrapolation chamber showed the highest influence of 25.9% for the collecting electrode, and the best material for the collecting electrode for CT radiation beams was graphite.Resumo IPEN-doc 26061 Simulation of a TH-GEM based detector for standard mammography-quality beam dosimetry using the MCNP5 code2019 - SILVA, N.F.; SILVA, T.F.; CASTRO, M.C.; LUZ, H.N. da; CINTRA, F.B.; CALDAS, L.V.E.Resumo IPEN-doc 26042 Simulation of geometry and materials of the TH-GEM based detector for radiation dosimetry2018 - SILVA, NATALIA F.; SILVA, TIAGO F.; CASTRO, MAYSA C.; LUZ, HUGO N. da; CINTRA, FELIPE B.; CALDAS, LINDA V.E.Resumo IPEN-doc 26038 Evaluation of an extrapolation chamber for dosimetry in computed tomography beams using Monte Carlo code (MCNP5)2018 - CASTRO, MAYSA C.; SILVA, NATALIA F.; SANTOS, LUCAS R.; CINTRA, FELIPE B.; CALDAS, LINDA V.E.Artigo IPEN-doc 24056 Evaluation of the influence of the TH-GEM detector components in dosimetric measurements of standard mammography beams2017 - SILVA, NATALIA F.; SILVA, TIAGO F.; CASTRO, MAYSA C.; CINTRA, FELIPE B.; LUZ, HUGO N. da; CALDAS, LINDA V.E.GEM detectors have found applications in many areas due to their simplicity of construction, low cost, ruggedness and diversity of shape. A dosimeter with these qualities presents utility in several applications, as for example in diagnostic and therapeutic medicine, industrial radiography and nuclear meters. Furthermore, the high sensitivity provided by GEM detectors may extend their applications in low dose dosimetry. Based on these facts, it may be interesting to produce a prototype of a portable TH-GEM type detector with characteristics suitable for dosimetric use in X-rays with low and medium energies. The precise determination of the dosimeter characteristics is very important for laboratories of instrument calibration, as well as to determine how the various components of the detector may influence on the energy deposited in the sensitive volume. In this work, the results obtained about the influence of each one of the components present in this type of detector in standard mammography beams is presented. The code MCNP5 was used. The results allowed the adaptation of the detector to the desired conditions.Artigo IPEN-doc 19390 Designing a water calorimeter as primary standard of gamma rays at IPEN/CNEN2013 - CINTRA, FELIPE B. de; CALDAS, LINDA V.E.Artigo IPEN-doc 16820 Spectrum reconstruction of spatial and energetic clinical electron beans of 4 and 9 Mev used by the linear accelerator at radiotherapy center in UNESP/Botucatu with MCNP42011 - TADA, ARIANE; COELHO, TALITA S.; CINTRA, FELIPE B. de; FONSECA, GABRIEL P.; FERNANDES, MARCO A.R.; YORIYAZ, HELIOArtigo IPEN-doc 17360 Evaluation of charged particles multi-scattering theories for microdosimetry2011 - CINTRA, F.B.; MASSICANO, F.; YORIYAZ, H.Artigo IPEN-doc 17314 Influence of elemental weight of human tissues estimated by ICCT software in absorbed dose calculation2011 - MASSICANO, F.; POSSANI, R.G.; CINTRA, F.B.; MASSICANO, A.V.F.; YORIYAZ, H.Artigo IPEN-doc 17055 Evaluation of chang's attenuation correction method in the ACS software2011 - MASSICANO, FELIPE; CINTRA, FELIPE B.; COELHO, TALITA S.; MASSICANO, ADRIANA V.F.; VIANA, RODRIGO S.S.; YORIYAZ, HELIO