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Article: Fundamental performance assessment of 2-D myocardial elastography in a phased-array configuration

TitleFundamental performance assessment of 2-D myocardial elastography in a phased-array configuration
Authors
Issue Date2009
Citation
Ieee Transactions On Ultrasonics, Ferroelectrics, And Frequency Control, 2009, v. 56 n. 10, p. 2320-2327 How to Cite?
AbstractTwo-dimensional myocardial elastography, an RF-based, speckle-tracking technique, uses 1-D cross-correlation and recorrelation methods in a 2-D search, and can estimate and image the 2-D transmural motion and deformation of the myocardium so as to characterize the cardiac function. Based on a 3-D finite-element (FE) canine left-ventricular model, a theoretical framework was previously developed by our group to evaluate the estimation quality of 2-D myocardial elastography using a linear array. In this paper, an ultrasound simulation program, Field II, was used to generate the RF signals of a model of the heart in a phased-array configuration and under 3-D motion conditions; thus simulating a standard echocardiography exam. The estimation method of 2-D myocardial elastography was adapted for use with such a configuration. All elastographic displacements and strains were found to be in good agreement with the FE solutions, as indicated by the mean absolute error (MAE) between the two. The classified first and second principal strains approximated the radial and circumferential strains, respectively, in the phased-array configuration. The results at different sonographic signal-tonoise ratios (SNRs) showed that the MAEs of the axial, lateral, radial, and circumferential strains remained relatively constant when the SNRs was equal to or higher than 20 dB. The MAEs of the strain estimation were not significantly affected when the acoustic attenuation was included in the simulations. A significantly reduced number of scatterers could be used to speed up the simulation, without sacrificing the estimation quality.The proposed framework can further be used to assess the estimation quality, explore the theoretical limitation and investigate the effects of various parameters in 2-D myocardial elastography under more realistic conditions. © 2009 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/167059
ISSN
2015 Impact Factor: 2.287
2015 SCImago Journal Rankings: 0.910
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLuo, Jen_US
dc.contributor.authorLee, WNen_US
dc.contributor.authorKonofagou, EEen_US
dc.date.accessioned2012-09-28T04:02:25Z-
dc.date.available2012-09-28T04:02:25Z-
dc.date.issued2009en_US
dc.identifier.citationIeee Transactions On Ultrasonics, Ferroelectrics, And Frequency Control, 2009, v. 56 n. 10, p. 2320-2327en_US
dc.identifier.issn0885-3010en_US
dc.identifier.urihttp://hdl.handle.net/10722/167059-
dc.description.abstractTwo-dimensional myocardial elastography, an RF-based, speckle-tracking technique, uses 1-D cross-correlation and recorrelation methods in a 2-D search, and can estimate and image the 2-D transmural motion and deformation of the myocardium so as to characterize the cardiac function. Based on a 3-D finite-element (FE) canine left-ventricular model, a theoretical framework was previously developed by our group to evaluate the estimation quality of 2-D myocardial elastography using a linear array. In this paper, an ultrasound simulation program, Field II, was used to generate the RF signals of a model of the heart in a phased-array configuration and under 3-D motion conditions; thus simulating a standard echocardiography exam. The estimation method of 2-D myocardial elastography was adapted for use with such a configuration. All elastographic displacements and strains were found to be in good agreement with the FE solutions, as indicated by the mean absolute error (MAE) between the two. The classified first and second principal strains approximated the radial and circumferential strains, respectively, in the phased-array configuration. The results at different sonographic signal-tonoise ratios (SNRs) showed that the MAEs of the axial, lateral, radial, and circumferential strains remained relatively constant when the SNRs was equal to or higher than 20 dB. The MAEs of the strain estimation were not significantly affected when the acoustic attenuation was included in the simulations. A significantly reduced number of scatterers could be used to speed up the simulation, without sacrificing the estimation quality.The proposed framework can further be used to assess the estimation quality, explore the theoretical limitation and investigate the effects of various parameters in 2-D myocardial elastography under more realistic conditions. © 2009 IEEE.en_US
dc.languageengen_US
dc.relation.ispartofIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Controlen_US
dc.subject.meshAnimalsen_US
dc.subject.meshComputer Simulationen_US
dc.subject.meshDogsen_US
dc.subject.meshEchocardiography - Methodsen_US
dc.subject.meshElasticity Imaging Techniques - Methodsen_US
dc.subject.meshFinite Element Analysisen_US
dc.subject.meshHeart Ventricles - Ultrasonographyen_US
dc.subject.meshPhantoms, Imagingen_US
dc.subject.meshSignal Processing, Computer-Assisteden_US
dc.subject.meshSoftwareen_US
dc.titleFundamental performance assessment of 2-D myocardial elastography in a phased-array configurationen_US
dc.typeArticleen_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/TUFFC.2009.1313en_US
dc.identifier.pmid19942518-
dc.identifier.scopuseid_2-s2.0-72749086847en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-72749086847&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume56en_US
dc.identifier.issue10en_US
dc.identifier.spage2320en_US
dc.identifier.epage2327en_US
dc.identifier.isiWOS:000270592000027-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridLuo, J=7404182785en_US
dc.identifier.scopusauthoridLee, WN=22634980600en_US
dc.identifier.scopusauthoridKonofagou, EE=7005877325en_US

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