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Myocardium Contructility Characterization from Echocardiograms using Optical Flow
Manuel Calheiros Lobo; A. Sousa PereiraIn this thesis we propose a method to determine the local contraction patterns of the myocardium by computing the optical flow in a sequence of echocardiograms. The displacement field describing the 2-D motion of a region-of-interest (ROI) is computed between a pair of images by solving the optical flow equations under the assumption that the 2-0 strain tensors constant within the ROI and between the pair of su...
Teleimaging Tool using ISDN
Anabela Godinho; A. Sousa PereiraThe word Teleradiology, or more generically, Teleimagiology appeared in 1980 with the first systems that allow the transmission of medical images, through a data communications network, from a place to another. (...)Keywords: telemedicine; radiology; ISDN; cooperative workM.S., 1997more info. http://opac.ua.pt/F/?func=find-b&find_code=SYS&REQUEST=000105438 ; O conceito de Teleradiologia, ou mais g...
Digital Image Processing Package in Microsoft WINDOWS environment
Anabela Godinho; Osvaldo Santos; A. Sousa PereiraThe goal of this paper is to describe a generic Digital Image Processing Package in Microsoft WINDOWS environment. Several tecniques are used, such as Image Transforms ( Fourier, Walsh, Hadamard ), Histogram processing, Spatial Filtering and Color Map processing. An automatic character recognition tecnique isalso described. ; Este artigo descreve um sistema genérico de Proc...
Efeito da exposição prolongada a ruído ocupacional na função respiratória de tr...
Cardoso, A.; Oliveira, M.; Silva, A.; Águas, A.; Sousa-Pereira, A.Vibroacoustic disease is a pathology caused by long occupational exposure to large pressure amplitude and low frequency noise. It is a systemic disease, with evolvement of respiratory structures. The exposure workers to this noise of textile industry may favour alterations in lung function. We studied 28 women working more than ten years in cotton-mill rooms to evaluate their lung function, including Spirometry...
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