X Ray Tube Focal Spot
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Implantação de um programa de controle de qualidade em equipamentos de raios x por meio de medidores não invasivos / Establishment of an X radiation equipment quality control programme using non invasive meters
The objective of this work was to study the behavior of the mainly X ray equipment calibration laboratory of IPEN, operated in the range from 25 kV to 150 kV using a PTW non invasive meter, model DiavoltTM, and an ORTEC spectrometry system, model NOMAD-PLUS 92X, for the establishment of a quality control programme. The Diavolt meter was used for measurements
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2010
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2. Proposta de simulação computacional para avaliação de sistemas de imagem radiológica pelo método das funções de transferência. / A computer simulation proposal for radiographic systems evaluation by the transfer functions method.
From the conventional evaluation by the radiological systems Transfer Functions, this work shows that it is necessary to obtain slit images at several field orientations so that this annalysis has a more real significance for non-isotropic systems. This is achieved from the non-linearity on the variations among the MTFs obtained in several directions between
Publicado em: 1992
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3. Design and characterization of a spatially distributed multibeam field emission x-ray source for stationary digital breast tomosynthesis
Digital breast tomosynthesis (DBT) is a limited angle computed tomography technique that can distinguish tumors from its overlying breast tissues and has potentials for detection of cancers at a smaller size and earlier stage. Current prototype DBT scanners are based on the regular full-field digital mammography systems and require partial isocentric motion
American Association of Physicists in Medicine.