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Computerized tomography (CT) was originally developed to produce images of transversal sections of the human body, but lately its application in industry has surpassed its application in Medicine. In the last years, the methods employed by CT have been used in various areas, such as in the analyses of soils, in determining the age of trees through measuring their rings, and in investigating structural defects and other fl aws in concrete. In this study, by using data obtained by the Mini Computerized Gama-Ray Tomographer of the University of Sorocaba (MCTU), we installed a new device in the Tri-Dimensional Tomography Program (TTD) that permits to automatically classify elements present in tomographic data, such as the identifi cation of thick aggregates (fl intstones) in samples of concrete. It also allows the calculation of volume, surface areas and position. The information attained by these means can be used as an important tool in the analysis of tomographic data. In this study, we analyzed the techniques used to process the images and we tried to verify the segmentation and classifi cation processes. Finally, we presented some results obtained from the analysis of a “phantom”, especially built to check the new devices, and also the analysis of a sample of concrete.

publicatio uepg. ciências exatas e da terra, ciências agrárias e engenharias./publicatio uepg. ciências exatas e da terra, ciências agrárias e engenharias

CARACTERIZACAO DE MATERIAIS USANDO DADOS DE TOMOGRAFIA COMPUTADORIZADA POR TRANSMISSAO DE RAIOS GAMA