BDTD Ibict
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The Biblioteca Digital de Teses e Dissertaçñes (BDTD) of the Instituto Brasileiro de Informação em Ciência e Tecnologia (IBICT) coordinates the integration of the existing thesis and dissertation systems in the Instituiçñes de Ensino Superior (IES) of Brazil. IBICT acts to provide new technologies of access to this information, and also to stimulate the registration and publication of theses and dissertations.
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Study of detectors semiconductors with application in diagnostic X-rays - César Marques Salgado
This work aims an evaluation of procedures for photons spectrum determination, produced by a X ray tube, normally used for medical diagnoses which operation voltage ranges from 20 to 150 kVp, to allow more precise characterization of the photon beam. The use of spectrum analysis will contribute to reduce the uncertainty in the ionization camera calibrations. For this purpose, two kinds of detectors were selected, a Cadmium Zinc Telluride (CZT) and a planar HPGe detectors. The X ray interaction with the detector?s crystal produces, by electronic processes, a pulse high distribution as an output, which is not the true photon...
(PDF) - 24-dic-2006
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