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Conference Paper: Clinical validation of angle-independent myocardial elastography using MRI tagging

TitleClinical validation of angle-independent myocardial elastography using MRI tagging
Authors
KeywordsAngle-Independent
Circumferential
Cross-Correlation
Elastography
Magentic Resonance Imaging
Myocardial
Prinicipal
Radial
Radio-Frequency
Recorrelation
Strain
Tagging
Issue Date2007
Citation
Proceedings - Ieee Ultrasonics Symposium, 2007, p. 749-752 How to Cite?
AbstractIn this paper, two-dimensional angle-independent myocardial elastography (2DME) was employed in order to assess and image myocardial deformation (or, strains) in an entire left-ventricular view and was further validated against tagged Magnetic Resonance Imaging (tMRI) in normal as well as abnormal human subjects. Both RF ultrasound and tMRI frames were acquired in a 2D short-axis (SA) view at the papillary muscle level. In 2DME, in-plane (lateral and axial) incremental displacements (i.e., between two consecutive RF frames) were iteratively estimated using 1D cross-correlation and recorrelation techniques in a 2D search with a 1D matching kernel. The incremental displacements starting from end-diastole (ED) to end-systole (ES) were then accumulated to obtain cumulative systolic displacements. In tMRI, cardiac motion was obtained using a template-matching algorithm on a 2D grid-shaped mesh. The entire displacement distribution within the myocardium was obtained by a cubic B-spline-based method. In both 2DME and tMRL 2D Lagrangian finite systolic strains were calculated from cumulative 2D displacements. Principal strains, which were angle-independent and less centroid dependent than polar (i.e., radial and circumferential) strains, were then computed from the 2D finite strains through our previously established strategy. Both qualitatively (or, full SA view) and quantitatively (or, temporal strain profiles), 2DME is shown capable of estimating myocardial deformation highly comparable to tMRI estimates in a clinical setting. © 2007 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/167108
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorLee, WNen_US
dc.contributor.authorQian, Zen_US
dc.contributor.authorMetaxas, DNen_US
dc.contributor.authorKonofagou, EEen_US
dc.date.accessioned2012-09-28T04:04:13Z-
dc.date.available2012-09-28T04:04:13Z-
dc.date.issued2007en_US
dc.identifier.citationProceedings - Ieee Ultrasonics Symposium, 2007, p. 749-752en_US
dc.identifier.issn1051-0117en_US
dc.identifier.urihttp://hdl.handle.net/10722/167108-
dc.description.abstractIn this paper, two-dimensional angle-independent myocardial elastography (2DME) was employed in order to assess and image myocardial deformation (or, strains) in an entire left-ventricular view and was further validated against tagged Magnetic Resonance Imaging (tMRI) in normal as well as abnormal human subjects. Both RF ultrasound and tMRI frames were acquired in a 2D short-axis (SA) view at the papillary muscle level. In 2DME, in-plane (lateral and axial) incremental displacements (i.e., between two consecutive RF frames) were iteratively estimated using 1D cross-correlation and recorrelation techniques in a 2D search with a 1D matching kernel. The incremental displacements starting from end-diastole (ED) to end-systole (ES) were then accumulated to obtain cumulative systolic displacements. In tMRI, cardiac motion was obtained using a template-matching algorithm on a 2D grid-shaped mesh. The entire displacement distribution within the myocardium was obtained by a cubic B-spline-based method. In both 2DME and tMRL 2D Lagrangian finite systolic strains were calculated from cumulative 2D displacements. Principal strains, which were angle-independent and less centroid dependent than polar (i.e., radial and circumferential) strains, were then computed from the 2D finite strains through our previously established strategy. Both qualitatively (or, full SA view) and quantitatively (or, temporal strain profiles), 2DME is shown capable of estimating myocardial deformation highly comparable to tMRI estimates in a clinical setting. © 2007 IEEE.en_US
dc.languageengen_US
dc.relation.ispartofProceedings - IEEE Ultrasonics Symposiumen_US
dc.subjectAngle-Independenten_US
dc.subjectCircumferentialen_US
dc.subjectCross-Correlationen_US
dc.subjectElastographyen_US
dc.subjectMagentic Resonance Imagingen_US
dc.subjectMyocardialen_US
dc.subjectPrinicipalen_US
dc.subjectRadialen_US
dc.subjectRadio-Frequencyen_US
dc.subjectRecorrelationen_US
dc.subjectStrainen_US
dc.subjectTaggingen_US
dc.titleClinical validation of angle-independent myocardial elastography using MRI taggingen_US
dc.typeConference_Paperen_US
dc.identifier.emailLee, WN: wnlee@hku.hken_US
dc.identifier.authorityLee, WN=rp01663en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1109/ULTSYM.2007.192en_US
dc.identifier.scopuseid_2-s2.0-48149104219en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-48149104219&selection=ref&src=s&origin=recordpageen_US
dc.identifier.spage749en_US
dc.identifier.epage752en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLee, WN=22634980600en_US
dc.identifier.scopusauthoridQian, Z=7201384454en_US
dc.identifier.scopusauthoridMetaxas, DN=7006359060en_US
dc.identifier.scopusauthoridKonofagou, EE=7005877325en_US

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