Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/1565
DC FieldValueLanguage
dc.contributor.authorHolton, Andrea D.-
dc.contributor.authorWalsh, Edward G.-
dc.contributor.authorAnayiotos, Andreas-
dc.contributor.otherΑναγιωτός, Ανδρέας-
dc.date.accessioned2013-03-04T13:50:20Zen
dc.date.accessioned2013-05-17T05:22:51Z-
dc.date.accessioned2015-12-02T10:11:47Z-
dc.date.available2013-03-04T13:50:20Zen
dc.date.available2013-05-17T05:22:51Z-
dc.date.available2015-12-02T10:11:47Z-
dc.date.issued2005-07-18-
dc.identifier.citationJournal of Magnetic Resonance Imaging, 2005, vol. 22, no. 2, pp. 248-257en_US
dc.identifier.issn10531807-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/1565-
dc.description.abstractPurpose: To evaluate different grades of in-stent stenosis in a nickel-titanium stent with MRI. Materials and Methods: Magnetic resonance phase velocity mapping (MR-PVM) was used to measure flow velocity through a 9-mm NiTi stent with three different degrees of stenosis in a phantom study. The tested stenotic geometries were 1) axisymmetric 75%. 2) axisymmetric 90%, and 3) asymmetric 50%. The MR-PVM data were subsequently compared with the velocities from computational fluid dynamic (CFD) simulations of identical conditions. Results: Good quantitative agreement in velocity distribution for the 50% and 75% stenoses was observed. The agreement was poor for the 90% stenosis, most likely due to turbulence and the high-velocity gradients found in the small luminal area relative to the pixel resolution in our imaging settings. Conclusion: The accuracy of the MRI velocities inside the stented area renders MRI a modality that may be used to assess moderate to severe in-stent restenosis (ISR) in medium-sized vascular stents in peripheral vessels, such as the iliac, carotid, and femoral arteries. Advances in MR instrumentation may provide sufficient resolution to obtain adequate velocity information from smaller vessels, such as the coronary arteries, and allow MRI to substitute for invasive and expensive catheterization procedures currently in clinical use.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofJournal of Magnetic Resonance Imagingen_US
dc.rights© Wiley-Lissen_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
dc.subjectHemodynamicsen_US
dc.subjectTitaniumen_US
dc.subjectNickelen_US
dc.subjectCarotid arteryen_US
dc.subjectGeometryen_US
dc.titleEvaluation of in-stent stenosis by magnetic resonance phase-velocity mapping in nickel-titanium stentsen_US
dc.typeArticleen_US
dc.affiliationUniversity of Alabama at Birminghamen
dc.collaborationUniversity of Alabama at Birminghamen_US
dc.subject.categoryENGINEERING AND TECHNOLOGYen_US
dc.journalsHybrid Open Accessen_US
dc.countryCyprusen_US
dc.subject.fieldEngineering and Technologyen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1002/jmri.20380en_US
dc.dept.handle123456789/54en
dc.relation.issue2en_US
dc.relation.volume22en_US
cut.common.academicyear2005-2006en_US
dc.identifier.spage248en_US
dc.identifier.epage257en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn1522-2586-
crisitem.journal.publisherWiley-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0003-4471-7604-
crisitem.author.parentorgFaculty of Engineering and Technology-
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