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Improved tracking performance of lagrangian block-matching methodologies using block expansion in the time domain: In silico, phantom and invivo evaluations
Lund Univ, Dept Biomed Engn, S-22100 Lund, Sweden..
Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
Lund Univ, Dept Clin Sci, Clin Physiol & Nucl Med Unit, Malmo, Sweden..
Lund Univ, Dept Biomed Engn, S-22100 Lund, Sweden..
2014 (engelsk)Inngår i: Ultrasound in Medicine and Biology, ISSN 0301-5629, E-ISSN 1879-291X, Vol. 40, nr 10, s. 2508-2520Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The aim of this study was to evaluate tracking performance when an extra reference block is added to a basic block-matching method, where the two reference blocks originate from two consecutive ultrasound frames. The use of an extra reference block was evaluated for two putative benefits: (i) an increase in tracking performance while maintaining the size of the reference blocks, evaluated using in silico and phantom cine loops; (ii) a reduction in the size of the reference blocks while maintaining the tracking performance, evaluated using in vivo cine loops of the common carotid artery where the longitudinal movement of the wall was estimated. The results indicated that tracking accuracy improved (mean - 48%, p<0.005 [in silico]; mean - 43%, p<0.01 [phantom]), and there was a reduction in size of the reference blocks while maintaining tracking performance (mean - 19%, p<0.01 [in vivo]). This novel method will facilitate further exploration of the longitudinal movement of the arterial wall. (C) 2014 World Federation for Ultrasound in Medicine & Biology.

sted, utgiver, år, opplag, sider
Elsevier, 2014. Vol. 40, nr 10, s. 2508-2520
Emneord [en]
Ultrasound, Motion estimation, Longitudinal movement, Speckle tracking, Arterial wall movement
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-35444DOI: 10.1016/j.ultrasmedbio.2014.05.010ISI: 000343144400020PubMedID: 25130445Scopus ID: 2-s2.0-84926250866OAI: oai:DiVA.org:hh-35444DiVA, id: diva2:1159482
Tilgjengelig fra: 2017-11-22 Laget: 2017-11-22 Sist oppdatert: 2018-01-13bibliografisk kontrollert

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