Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/1694
DC FieldValueLanguage
dc.contributor.authorPerry, Gilbert J.-
dc.contributor.authorMyers, Jerry G.-
dc.contributor.authorAnayiotos, Andreas-
dc.contributor.otherΑναγιωτός, Ανδρέας-
dc.date.accessioned2013-03-04T14:14:51Zen
dc.date.accessioned2013-05-17T05:22:18Z-
dc.date.accessioned2015-12-02T09:59:37Z-
dc.date.available2013-03-04T14:14:51Zen
dc.date.available2013-05-17T05:22:18Z-
dc.date.available2015-12-02T09:59:37Z-
dc.date.issued1995-
dc.identifier.citationUltrasound in Medicine and Biology, 1995, vol. 21, no. 4, pp. 501-516en_US
dc.identifier.issn03015629-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/1694-
dc.description.abstractttempts to quantify valvular regurgitation have recently been focused on the proximal orifice flow field. A complete description of the proximal orifice flow field is provided in this investigation. A steady state in vitro model accessible by both color Doppler ultrasound (CDU) and laser Doppler velocimetry (LDV) was utilized. Velocities for varying flow rates and orifices were calculated by finite element modeling (FEM), by LDV and by CDU. The steady flow model was composed of circular orifices of 3, 5 and 10 mm diameters at flow rates from 0.7 to 10 L/min. Regurgitant flow rates were calculated from the proximal CDU data by two separate methods. The first approach utilized angle corrected velocities while the second approach utilized only velocities which did not require angle correction (centerline velocities). Both methods correlated well with known flow rates (y = 0.97x - 0.09, r = 0.98, SEE = 0.45, p < 0.0001; and y = 1.0x + 0.07, r = 0.99, SEE = 0.27, p < 0.0001, respectively) and were superior to results obtained by assuming a hemispherical geometry as is done in the aliasing technique. The methodology provides a complete analysis of the proximal flow field and involves fewer geometric assumptions than the aliasing approach. This may prove to be an advantage when analyzing in vivo flow fields with complex, uncertain geometry. Attempts to quantify valvular regurgitation have recently been focused on the proximal orifice flow field. This paper provides a complete description of this proximal orifice flow field. A steady state in vitro model accessible by both color Doppler ultrasound (CDU) and laser Doppler velocimetry (LDV) was utilized. Velocities for varying flow rates and orifices were calculated by finite element modeling (FEM), by LDV and by CDU.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofUltrasound in Medicine and Biologyen_US
dc.rights© Elsevieren_US
dc.subjectEchocardiographyen_US
dc.subjectUltrasonic imagingen_US
dc.subjectHemodynamicsen_US
dc.subjectComputer simulationen_US
dc.subjectBlood flow Measurementen_US
dc.titleA numerical and experimental investigation of the flow acceleration region proximal to an orificeen_US
dc.typeArticleen_US
dc.affiliationUniversity of Alabama at Birminghamen
dc.collaborationUniversity of Alabama at Birminghamen_US
dc.collaborationBirmingham Veteran's Administration Medical Centeren_US
dc.journalsSubscriptionen_US
dc.countryUnited Kingdomen_US
dc.subject.fieldMedical and Health Sciencesen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1016/0301-5629(94)00141-Yen_US
dc.dept.handle123456789/54en
dc.relation.issue4en_US
dc.relation.volume21en_US
cut.common.academicyear1995-1996en_US
dc.identifier.spage501en_US
dc.identifier.epage516en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn0301-5629-
crisitem.journal.publisherElsevier-
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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