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Article: Combined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharing

TitleCombined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharing
Authors
Issue Date2003
PublisherIEEE.
Citation
Ieee Transactions On Medical Imaging, 2003, v. 22 n. 7, p. 806-823 How to Cite?
AbstractA new technique to reduce clinical magnetic resonance imaging (MRI) scan time by varying acquisition parameters and sharing k-space data between images, is proposed. To improve data utilization, acquisition of multiple images of different contrast is combined into a single scan, with variable acquisition parameters including repetition time (TR), echo time (TE), and echo train length (ETL). This approach is thus referred to as a "combo acquisition." As a proof of concept, simulations of MRI experiments using spin echo (SE) and fast SE (FSE) sequences were performed based on Bloch equations. Predicted scan time reductions of 25%-50% were achieved for 2-contrast and 3-contrast combo acquisitions. Artifacts caused by nonuniform k-space data weighting were suppressed through semi-empirical optimization of parameter variation schemes and the phase encoding order. Optimization was assessed by minimizing three quantitative criteria: energy of the "residue point spread function (PSF)," energy of "residue profiles" across sharp tissue boundaries, and energy of "residue images." In addition, results were further evaluated by quantitatively analyzing the preservation of contrast, the PSF, and the signal-to-noise ratio. Finally, conspicuity of lesions was investigated for combo acquisitions in comparison with standard scans. Implications and challenges for the practical use of combo acquisitions are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/42967
ISSN
2015 Impact Factor: 3.756
2015 SCImago Journal Rankings: 1.941
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMékle, Ren_HK
dc.contributor.authorLaine, AFen_HK
dc.contributor.authorWu, EXen_HK
dc.date.accessioned2007-03-23T04:35:40Z-
dc.date.available2007-03-23T04:35:40Z-
dc.date.issued2003en_HK
dc.identifier.citationIeee Transactions On Medical Imaging, 2003, v. 22 n. 7, p. 806-823en_HK
dc.identifier.issn0278-0062en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42967-
dc.description.abstractA new technique to reduce clinical magnetic resonance imaging (MRI) scan time by varying acquisition parameters and sharing k-space data between images, is proposed. To improve data utilization, acquisition of multiple images of different contrast is combined into a single scan, with variable acquisition parameters including repetition time (TR), echo time (TE), and echo train length (ETL). This approach is thus referred to as a "combo acquisition." As a proof of concept, simulations of MRI experiments using spin echo (SE) and fast SE (FSE) sequences were performed based on Bloch equations. Predicted scan time reductions of 25%-50% were achieved for 2-contrast and 3-contrast combo acquisitions. Artifacts caused by nonuniform k-space data weighting were suppressed through semi-empirical optimization of parameter variation schemes and the phase encoding order. Optimization was assessed by minimizing three quantitative criteria: energy of the "residue point spread function (PSF)," energy of "residue profiles" across sharp tissue boundaries, and energy of "residue images." In addition, results were further evaluated by quantitatively analyzing the preservation of contrast, the PSF, and the signal-to-noise ratio. Finally, conspicuity of lesions was investigated for combo acquisitions in comparison with standard scans. Implications and challenges for the practical use of combo acquisitions are discussed.en_HK
dc.format.extent2083617 bytes-
dc.format.extent25088 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Transactions on Medical Imagingen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.subject.meshAlgorithmsen_HK
dc.subject.meshBrain - anatomy & histologyen_HK
dc.subject.meshHumansen_HK
dc.subject.meshImage Enhancement - methodsen_HK
dc.subject.meshImaging, Three-Dimensional - methodsen_HK
dc.subject.meshMagnetic Resonance Imaging - instrumentation - methodsen_HK
dc.subject.meshPhantoms, Imagingen_HK
dc.subject.meshQuality Controlen_HK
dc.subject.meshSignal Processing, Computer-Assisteden_HK
dc.subject.meshSubtraction Techniqueen_HK
dc.titleCombined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0278-0062&volume=22&issue=7&spage=806&epage=823&date=2003&atitle=Combined+MR+data+acquisition+of+multicontrast+images+using+variable+acquisition+parameters+and+K-space+data+sharingen_HK
dc.identifier.emailWu, EX:ewu1@hkucc.hku.hken_HK
dc.identifier.authorityWu, EX=rp00193en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TMI.2003.815054en_HK
dc.identifier.pmid12906235-
dc.identifier.scopuseid_2-s2.0-0642336606en_HK
dc.identifier.hkuros90221-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0642336606&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue7en_HK
dc.identifier.spage806en_HK
dc.identifier.epage823en_HK
dc.identifier.isiWOS:000184443900003-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridMékle, R=6506702350en_HK
dc.identifier.scopusauthoridLaine, AF=26643433600en_HK
dc.identifier.scopusauthoridWu, EX=7202128034en_HK

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