File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Bidirectional Ultrasound Elastographic Imaging Framework for Non-invasive Assessment of the Non-linear Behavior of a Physiologically Pressurized Artery

TitleBidirectional Ultrasound Elastographic Imaging Framework for Non-invasive Assessment of the Non-linear Behavior of a Physiologically Pressurized Artery
Authors
KeywordsArtery
Elastography
Non-linear
Shear modulus
Strain
Ultrasound
Issue Date2019
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/ultrasmedbio
Citation
Ultrasound in Medicine and Biology, 2019, v. 45 n. 5, p. 1184-1196 How to Cite?
AbstractStudies of non-destructive bidirectional ultrasound assessment of non-linear mechanical behavior of the artery are scarce in the literature. We hereby propose derivation of a strain–shear modulus relationship as a new graphical diagnostic index using an ultrasound elastographic imaging framework, which encompasses our in-house bidirectional vascular guided wave imaging (VGWI) and ultrasound strain imaging (USI). This framework is used to assess arterial non-linearity in two orthogonal (i.e., longitudinal and circumferential) directions in the absence of non-invasive pressure measurement. Bidirectional VGWI estimates longitudinal (μL) and transverse (μT) shear moduli, whereas USI estimates radial strain (ɛr). Vessel-mimicking phantoms (with and without longitudinal pre-stretch) and in vitro porcine aortas under static and/or dynamic physiologic intraluminal pressure loads were examined. ɛr was found to be a suitable alternative to intraluminal pressure for representation of cyclic loading on the artery wall. Results revealed that μT values of all samples examined increased non-linearly with εr magnitude and more drastically than μL, whereas μL values of only the pre-stretched phantoms and aortas increased with ɛr magnitude. As a new graphical representation of arterial non-linearity and function, strain–shear modulus loops derived by the proposed framework over two consecutive dynamic loading cycles differentiated sample pre-conditions and corroborated direction-dependent non-linear mechanical behaviors of the aorta with high estimation repeatability.
Persistent Identifierhttp://hdl.handle.net/10722/269551
ISSN
2017 Impact Factor: 2.645
2015 SCImago Journal Rankings: 0.885
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, Y-
dc.contributor.authorLi, H-
dc.contributor.authorGuo, Y-
dc.contributor.authorLee, W-
dc.date.accessioned2019-04-24T08:10:00Z-
dc.date.available2019-04-24T08:10:00Z-
dc.date.issued2019-
dc.identifier.citationUltrasound in Medicine and Biology, 2019, v. 45 n. 5, p. 1184-1196-
dc.identifier.issn0301-5629-
dc.identifier.urihttp://hdl.handle.net/10722/269551-
dc.description.abstractStudies of non-destructive bidirectional ultrasound assessment of non-linear mechanical behavior of the artery are scarce in the literature. We hereby propose derivation of a strain–shear modulus relationship as a new graphical diagnostic index using an ultrasound elastographic imaging framework, which encompasses our in-house bidirectional vascular guided wave imaging (VGWI) and ultrasound strain imaging (USI). This framework is used to assess arterial non-linearity in two orthogonal (i.e., longitudinal and circumferential) directions in the absence of non-invasive pressure measurement. Bidirectional VGWI estimates longitudinal (μL) and transverse (μT) shear moduli, whereas USI estimates radial strain (ɛr). Vessel-mimicking phantoms (with and without longitudinal pre-stretch) and in vitro porcine aortas under static and/or dynamic physiologic intraluminal pressure loads were examined. ɛr was found to be a suitable alternative to intraluminal pressure for representation of cyclic loading on the artery wall. Results revealed that μT values of all samples examined increased non-linearly with εr magnitude and more drastically than μL, whereas μL values of only the pre-stretched phantoms and aortas increased with ɛr magnitude. As a new graphical representation of arterial non-linearity and function, strain–shear modulus loops derived by the proposed framework over two consecutive dynamic loading cycles differentiated sample pre-conditions and corroborated direction-dependent non-linear mechanical behaviors of the aorta with high estimation repeatability.-
dc.languageeng-
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/ultrasmedbio-
dc.relation.ispartofUltrasound in Medicine and Biology-
dc.subjectArtery-
dc.subjectElastography-
dc.subjectNon-linear-
dc.subjectShear modulus-
dc.subjectStrain-
dc.subjectUltrasound-
dc.titleBidirectional Ultrasound Elastographic Imaging Framework for Non-invasive Assessment of the Non-linear Behavior of a Physiologically Pressurized Artery-
dc.typeArticle-
dc.identifier.emailLi, H: hli913@hku.hk-
dc.identifier.emailLee, W: wnlee@hku.hk-
dc.identifier.authorityLee, W=rp01663-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ultrasmedbio.2019.01.014-
dc.identifier.pmid30876671-
dc.identifier.scopuseid_2-s2.0-85062624746-
dc.identifier.hkuros297318-
dc.identifier.volume45-
dc.identifier.issue5-
dc.identifier.spage1184-
dc.identifier.epage1196-
dc.identifier.isiWOS:000464126800014-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats