INFORMATICA International Journal Main Page Editorial Board Abstracting/Indexing Instructions to Authors Subscription Information Contents Author Index Papers in Production		INFORMATICA, 2007, Vol. 18, No. 4, 603-614 © Institute of Mathematics and Informatics, ISSN 0868-4952 An Optimization of System for Automatic Recognition of Ischemic Stroke Areas in Computed Tomography Images Darius GRIGAITISa, Vaida BARTKUTEb, Leonidas SAKALAUSKASb aDepartment of Electronic Systems, Vilnius Gediminas Technical University Naugarduko 41, 03227 Vilnius, Lithuania E-mail: darius.grigaitis@el.vtu.lt bInstitute of Mathematics and Informatics Akademijos 4, 08663 Vilnius, Lithuania E-mail: vaidaba@one.lt, sakal@ktl.mii.lt Abstract The paper considers application of stochastic optimization to system of automatic recognition of ischemic stroke area on computed tomography (CT) images. The algorithm of recognition depends on five inputs that influence the results of automatic detection. The quality of recognition is measured by size of conjunction of ethalone image and the image calculated by the program of automatic detection. The method of Simultaneous Perturbation Stohastic Approximation algorithm with the Metropolis rule has been applied to the optimization of the quality of image recognition. The Monte-Carlo simulation experiment was performed in order to evaluate the properties of developed algorithm. Keywords: ischemic stroke area, Monte-Carlo method, computed tomography To preview Lithuanian abstract see full article text To preview full article text in PDF format click here You could obtain free Acrobat Reader from Adobe
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