CARLOS HENRIQUE DE MESQUITA

CARLOS HENRIQUE DE MESQUITA

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A new industrial tomography system combining simultaneously the emission and transmission tomography systems
2018 - MESQUITA, C.H.; VELO, A.F.; CALVO, W.A.; CARVALHO, D.V.; HAMADA, M.M.
The tomographic techniques can be used in many industries to explore the interior of their objects, for example, (a) to act as the quality control of industrialized products or (b) to diagnose and identify failure in their production devices. Commonly, the industrial objects are chemical reactors, packaging of foods, encapsulated medicaments, columns of petroleum distillation, combustion engines, among other industrial objects. A portable tomography system known as instant-non-scanning type, a similar version of the fourth generation CT, was developed in this work. It comprises 70 NaI(Tl) detectors with the same number of multichannel type acquisition boards.One of the advantages of industrial tomography is that it allows inferring the quality of the production line without interrupting the production. The tomographic system described in this work is capable to obtain measurements in real time and requires no movement of radiation sources and detectors. The tomographic system, proposed in this work, allows the introduction of a radioactive tracer inside the industrial object, for example a tube or chemical reactor and then the user will obtain the reconstruction images of a tomographic emission system together to the transmission image. By means of radioactive sources positioned externally to the object the user will obtain the reconstructed images of the transmission tomographic system. Therefore, this article describes an innovative hybrid industrial tomographic system, capable of generating both emission and transmission tomographic images simultaneously.
Gallium-67 citrate used as a tracer of acetone production routes
2017 - MESQUITA, CARLOS H. de; CALVO, WILSON A.P.; AOKI, PEDRO E.; SILVA, VALDIR C. da; HARAGUCHI, MARCIO I.; VELO, ALEXANDRE F.; ALVAREZ, ALEXANDRE G.; PAIXAO, LETICIA B.; HAMADA, MARGARIDA M.
In this work the pathway of the chemical product and the kinetics parameters were evaluated in a laboratory plant settled, using 40 GBq of 67Ga citrate as radiotracer and 18 NaI(Tl) radiation detectors. The AnaComp program was used to estimate the kinetic parameters of the acetone production. The yield of the acetone production was estimated by the percentage ratio between the areas under the curve (AUC) of the curve profiles of the final product compartment divided by the concentration found inside the chemical reactor whose result was 87% yield during the first 30 minutes of reaction.
Multi-source third generation computed tomography for industrial multiphase flows applications
2011 - MESQUITA, CARLOS H. de; VASQUEZ, PABLO A.S.; CALVO, WILSON A.P.; MARCATO, LARISSA A.; CARVALHO, DIEGO V.S.; MARTINS, JOAO F.T.; HAMADA, MARGARIDA M.
Caracterizacao do cristal cintilador CsI(Tl) desenvolvido no IPEN-CNEN/SP
1995 - PEREIRA, M.C.C.; HAMADA, M.M.; MADI FILHO, T.; CALVO, W.A.P.; BRUZINGA, W.A.; VIEIRA, J.M.; MESQUITA, C.H.
Description of two tomography systems developed at IPEN-CNEN/SP
2007 - TETZNER, GUARACIABA de C.; HAMADA, MARGARIDA M.; MADI FILHO, TUFIC; VASQUEZ, PABLO A.S.; RELA, PAULO R.; CALVO, WILSON A.P.; MESQUITA, CARLOS H.