Desenvolvimento de um microtomógrafo de raios X de baixo custo que utiliza um sensor de imagem digital de pequenas dimensões

Abstract

Computed microtomography has the same physical principle as computed tomography and is a technique of great relevance to several areas of science. This work presents the development of a low-cost X-ray microtomograph to perform non-destructive tests in the study of small samples of materials. It uses as detector a digital image sensor originally developed for the acquisition of intraoral dental images and a low-power ray tube. The entire methodology which enabled the assembly of the system will be addressed, from X-ray emission, image detection and storage, sample rotation control, the computational part involved and radiological protection. The results obtained are presented, firstly, the microtomography system that was built and its main characteristics, and, the preliminary results of tests that were carried out, in order to analyze the microtomography and confirm its applicability. The system was able to produce good quality radiographs for the image reconstruction process, subsequently allowing a detailed analysis of the objects under study. The microtomograph fulfills the proposed objective, showing itself to be efficient in the study of small samples.