Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Alex Cristóvão Holanda de Oliveira"'
Autor:
José Wilson Vieira, Viriato Leal Neto, Pedro Henrique Avelino de Andrade, Alex Cristóvão Holanda de Oliveira, Vanildo Júnior de Melo Lima, Isabelle Viviane Batista de Lacerda, Luís Rodrigo Dandrada, Arykerne Nascimento Casado da Silva, William de Souza Santos, Ivan Eufrázio de Santana, Whoody Alem Wanderley Araripe Farias, Larissa Cristina Silva dos Santos, Fernanda Gonçalves Oliveira, Fernando Roberto de Andrade Lima
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 11, Iss 1A (Suppl.) (2023)
In computational dosimetry of ionizing radiation, the energy deposited in radiosensitive organs and tissues is evaluated when an anthropomorphic simulator (phantom) is irradiated using Exposure Computational Models (ECMs). An ECM is a virtual scene w
Externí odkaz:
https://doaj.org/article/d605e2a5a39941c2933e1b6d96ffd8c6
Autor:
Larissa Cristina Silva dos Santos, José Wilson Vieira, Fernando Roberto de Andrade Lima, Alex Cristóvão Holanda de Oliveira
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 11, Iss 1A (Suppl.) (2023)
Due to its vast number of occurrences, cancer has caused an economic impact on the public and supplementary health care sectors. It is estimated that more than 50% of patients diagnosed with malignant neoplasms need radiotherapy at some stage of thei
Externí odkaz:
https://doaj.org/article/b9acc2299dcf4d8dbdbbd856c289d856
Autor:
Nícollas Gonçalves Cavedini, Ricardo Meurer Papaléo, Nícolas Borges Jobim, Phelipi Nunes Schuck, Fabrício Nery Garrafiel, Elisa Magno Nunes de Oliveira, Marcelo Menna Barreto Schwarcke, Alex Cristóvão Holanda de Oliveira, Paulo Rauli Rafeson Vasconcelos Caribé, Ana Maria Marques da Silva
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 10, Iss 4 (2022)
This study aims to evaluate the dose sensitivity of MAGIC-f gel irradiated by high-energy photon beams, comparing quantification using different MRI sequences. Irradiation was performed using 6 MV photons with 600 cGy/min dose rate, field size of 20x
Externí odkaz:
https://doaj.org/article/cb2ced43111444fdb0b288dd4dfacde1
Autor:
Carlos Renato dos Santos, Antônio Celso Dantas Antonino, Richard John Heck, Leandro Ricardo Rodrigues de Lucena, Alex Cristóvão Holanda de Oliveira, Antonio Samuel Alves da Silva, Borko Stosic, Romulo Simões Cezar Menezes
Publikováno v:
Acta Scientiarum: Agronomy, Vol 42, Pp e42491-e42491 (2020)
In this work, lacunarity analysis is performed on soil pores segmented by the pure voxel extraction method from soil tomography images. The conversion of forest to sugarcane plantation was found to result in higher sugarcane soil pore lacunarity than
Externí odkaz:
https://doaj.org/article/4496b38034cc4321b349508fa65867e1
Autor:
Jorge Alexandre Gomes Lins, Fernando Roberto de Andrade Lima, Marcus Aurélio Pereira dos Santos, Alex Cristóvão Holanda de Oliveira, Victor Hugo Farias Ferreira da Silva
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 8, Iss 1 (2020)
A radiologia diagnóstica está em evolução contínua, em resposta ao desenvolvimento tecnológico, permitindo diagnósticos com qualidade cada vez melhor [1]. Contudo, se faz necessário o estudo de materiais aplicados como barreiras de proteção
Externí odkaz:
https://doaj.org/article/f2cee0715c89426583f5688f1e7ca2ee
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 6, Iss 3 (2018)
This work describes the development and validation of a simulation platform, called Quimera, based on the Monte Carlo (MC) code Geant4 for dose evaluation in radiotherapy. Quimera consists of two MC applications (qMATphantoms and qNCTphantoms) for do
Externí odkaz:
https://doaj.org/article/9dfeebaef13f4edc9a65b24e77d4acc1
Autor:
Alex Cristóvão Holanda de Oliveira, José Wilson Vieira, Miriam Zarza Moreno, Fernando Roberto Andrade Lima
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 6, Iss 2 (2018)
Among the many algorithms developed for evaluation of dose distributions in radiotherapy, the Monte Carlo methods provide more realistic results. In intensity modulated radiation therapy, significant differences in dose distributions within the field
Externí odkaz:
https://doaj.org/article/3d878aee78574d45a18fca1063973dd4
Publikováno v:
Brazilian Journal of Radiation Sciences, Vol 3, Iss 1A (2015)
Radiotherapy uses various techniques and equipment for local treatment of cancer. The equipment most often used in radiotherapy to the patient irradiation is linear accelerator (Linac). Among the many algorithms developed for evaluation of dose distr
Externí odkaz:
https://doaj.org/article/0632da1fed0f4250ae487f6e662c10e8
Autor:
Alex Cristóvão Holanda de Oliveira, Marcus A.P. Santos, Jorge Alexandre Gomes Lins, Victor Hugo Farias Ferreira da Silva, Fernando Roberto de Andrade Lima
Publikováno v:
Brazilian Journal of Radiation Sciences. 8
A radiologia diagnóstica está em evolução contínua, em resposta ao desenvolvimento tecnológico, permitindo diagnósticos com qualidade cada vez melhor [1]. Contudo, se faz necessário o estudo de materiais aplicados como barreiras de proteção
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2bf57201d505117875055e89f83a080
https://doi.org/10.15392/bjrs.v8i1.976
https://doi.org/10.15392/bjrs.v8i1.976
Publikováno v:
Brazilian Journal of Radiation Sciences. 6
This work describes the development and validation of a simulation platform, called Quimera, based on the Monte Carlo (MC) code Geant4 for dose evaluation in radiotherapy. Quimera consists of two MC applications (qMATphantoms and qNCTphantoms) for do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2d92af5965605218d8294d435bdc9c6
https://doi.org/10.15392/bjrs.v6i3.816
https://doi.org/10.15392/bjrs.v6i3.816