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dc.contributor.authorSkjelvareid, Martin H.
dc.contributor.authorOlofsson, Tomas
dc.contributor.authorBirkelund, Yngve
dc.contributor.authorLarsen, yngvar
dc.date.accessioned2012-03-28T10:18:52Z
dc.date.available2012-03-28T10:18:52Z
dc.date.issued2011
dc.description.abstractThe synthetic aperture focusing technique (SAFT) is used to create focused images from ultrasound scans. SAFT has traditionally been applied only for imaging in a single medium, but the recently introduced phase shift migration (PSM) algorithm has expanded the use of SAFT to multilayer structures. In this article we present a similar focusing algorithm called multi-layer omega-k (MULOK), which combines PSM and the ω-k algorithm to perform multilayer imaging more efficiently. The asymptotic complexity is shown to be lower for MULOK than for PSM, and this is confirmed by comparing execution times for implementations of both algorithms. To facilitate the complexity analysis, a detailed description of algorithm implementation is included, which also serves as a guide for readers interested in practical implementation. Using data from an experiment with a multilayered structure, we show that there is essentially no difference in image quality between the two algorithms.en
dc.identifier.citationIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 58(2011) nr. 5 s. 1037-1048en
dc.identifier.cristinIDFRIDAID 806733
dc.identifier.doidoi: 10.1109/TUFFC.2011.1904
dc.identifier.issn0885-3010
dc.identifier.urihttps://hdl.handle.net/10037/4084
dc.identifier.urnURN:NBN:no-uit_munin_3804
dc.language.isoengen
dc.publisherIEEE Xploreen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation, visualization, signal processing, image processing: 429en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering, visualisering, signalbehandling, bildeanalyse: 429en
dc.titleSynthetic Aperture Focusing of Ultrasonic Data From Multilayered Media Using an Omega-K Algorithmen
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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