Transcription of IMAGE PROCESSING AND DATA ANALYSIS - Horia Hulubei
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IMAGE PROCESSING AND DATA ANALYSIS - Horia Hulubei
IMAGE PROCESSING AND data ANALYSISIN COMPUTED TOMOGRAPHY E. D. SELE CHI1, O. G. DULIU21 University of Bucharest, Faculty of Physics, Romania2 University of Bucharest, Department of Atomic and Nuclear Physics, M gurele, Box, MG-11, RO-077125, Bucharest, RomaniaReceived September 12, 2006 Computed Tomography (CT) is a non-invasive technique to provide CTimages of every part of the human body without superimposition of adjacentstructures. Measurements with X-ray CT are subject to a variety of imperfections orimage artifacts including: quantum noise, X-ray scattering by the patient, beamhardening and nonlinear partial volume effects.
668 E. D. Seleţchi, O. G. Duliu 2 where I0(x′) is the unattenuated intensity, φ and x′ define the position of the measurement, μ [x, y] is the two-dimensional distribution of the linearattenuation coefficient, l is the straight line joining the source and detector.The X-ray source and detector rotate with the x′y′ frame and the X-rays travel parallel
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