Reconstructed image quality analysis of an industrial instant non-scanning tomography system with different types of collimators by the Monte Carlo Simulation
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
The greatest impact of the tomography technology application currently occurs in medicine. The great success
of medical tomography is due to the human body presents reasonably standardized dimensions with wellestablished
chemical composition. Generally, these favorable conditions are not found in large industrial objects.
In the industry there is much interest in using the information of the tomograph in order to know the interior of:
(i) manufactured industrial objects or (ii) machines and their means of production. In these cases, the purpose of
the tomograph is to: (a) control the quality of the final product and (b) optimize production, contributing to the
pilot phase of the projects and analyzing the quality of the means of production. In different industrial processes,
e. g. in chemical reactors and distillation columns, the phenomena related to multiphase processes are usually
fast, requiring high temporal resolution of the computed tomography (CT) data acquisition. In this context,
Instant non-scanning tomograph and fifth generation tomograph meets these requirements. An instant nonscanning
tomography system is being developed at the IPEN/CNEN. In this work, in order to optimize the
system, this tomograph comprised different collimators was simulated, with Monte Carlo method using the
MCNP4C. The image quality was evaluated with Matlab® 2013b, by analysis of the following parameters:
contrast to noise (CNR), root mean square ratio (RMSE), signal to noise ratio (SNR) and the spatial resolution
by the Modulation Transfer Function (MTF(f)), to analyze which collimator fits better to the instant nonscanning
tomography. It was simulated three situations; (i) with no collimator; (ii) ?25 mm x 50 mm cylindrical
collimator with a septum of ø5.0 mm x 50 mm; (iii) ø25mm x 50 mm cylindrical collimator with a slit septum of
24 mm x 5.0 mm x 50 mm.
Como referenciar
VELO, ALEXANDRE F.; CARVALHO, DIEGO V.; ALVAREZ, ALEXANDRE G.; HAMADA, MARGARIDA M.; MESQUITA, CARLOS H. Reconstructed image quality analysis of an industrial instant non-scanning tomography system with different types of collimators by the Monte Carlo Simulation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28309. Acesso em: 19 Feb 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.