32 resultados para Radiografia digital
em Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho"
Resumo:
The conventional radiographic technique using industrial radiographic films is with the days finishing. The Digital Radiography is taking place in several sectors, e.g., the medical, aerospace, security, automotive, etc. In addition to representing a technological trend, it has been demonstrated that digital radiography offers a series of benefits in terms of productivity, sensitivity, environmental aspects, image treatment tools, cost reduction, etc. If one weld seam to be inspected is from a serried product, as example a pipe, the best option to be implemented is the Flat Panel Detector with this equipment is possible to reduce the obtaining digital radiographic images in place of films and reducing the inspection cycle time due to its high degree of automation. In the experiments described in this paper this new technique was tested and the results were compared with those obtained by the conventional radiography. The welded specimens were prepared using the submerged-arc welding process and small artificial cracks of the most varied dimensions, present in the specimens, were used to establish a comparison of the sensitivities presented by the techniques employed After conducting several experiments, the digital method presented the highest sensitivity to the wire-type Image Quality Indicator (IQI) and in the detection of small defects, leading to the conclusion that the use of digital radiography using the flat-panel detector offers advantages over the conventional technique [1, 2]. This work was carried out based on the API 5L Edition 2004 [3] and ISO 3183 Edition 2007 [4] specifications.
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Pós-graduação em Odontologia - FOAR
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Pós-graduação em Odontologia - FOAR
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Biopatologia Bucal - ICT
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Pós-graduação em Odontologia - FOAR
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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The objective of this study is to evaluate the measurement accuracy of endodontic files obtained by digital and conventional radiographies in primary teeth. Kerr and Hedströen files (# 20), with the reference as the apparent length of tooth, were inserted in the root canal of 18 extracted primary teeth, which were x-rayed by digital and conventional techniques. Measurements from a reference point to the apical end were carried out by an experienced operator twice in a week. An electronic ruler was used for the digital method and a caliper was used for the conventional method. The data were subjected to Pearson correlation test and Student´s t test (p = 0.05). The correlation between the first and the second measurements was r = 0.99, regardless the type of file and method. Comparing the measurements within the methods, the agreement was r = 0.96 for Kerr and r = 0.95 for Hedströen files. The values of length files in the digital radiographies were statistically lower than that obtained in the conventional radiographies (p = 0.02). However, the values obtained by the two methods were statistically similar to real length of teeth for Kerr files (p = 0.29) and for Hedströen files (p = 0.18). The digital radiography was a more trustful method to obtain the lengths of endodontic files.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Odontologia - FOAR
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)