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Article: Combined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharing
Title | Combined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharing |
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Authors | |
Keywords | Combined/combo acquisition k-space data sharing MRI Scan time reduction Variable acquisition parameter |
Issue Date | 2003 |
Publisher | IEEE. |
Citation | Ieee Transactions On Medical Imaging, 2003, v. 22 n. 7, p. 806-823 How to Cite? |
Abstract | A 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 Identifier | http://hdl.handle.net/10722/42967 |
ISSN | 2023 Impact Factor: 8.9 2023 SCImago Journal Rankings: 3.703 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Mékle, R | en_HK |
dc.contributor.author | Laine, AF | en_HK |
dc.contributor.author | Wu, EX | en_HK |
dc.date.accessioned | 2007-03-23T04:35:40Z | - |
dc.date.available | 2007-03-23T04:35:40Z | - |
dc.date.issued | 2003 | en_HK |
dc.identifier.citation | Ieee Transactions On Medical Imaging, 2003, v. 22 n. 7, p. 806-823 | en_HK |
dc.identifier.issn | 0278-0062 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/42967 | - |
dc.description.abstract | A 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.extent | 2083617 bytes | - |
dc.format.extent | 25088 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | application/msword | - |
dc.language | eng | en_HK |
dc.publisher | IEEE. | en_HK |
dc.relation.ispartof | IEEE Transactions on Medical Imaging | en_HK |
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. | - |
dc.subject | Combined/combo acquisition | - |
dc.subject | k-space data sharing | - |
dc.subject | MRI | - |
dc.subject | Scan time reduction | - |
dc.subject | Variable acquisition parameter | - |
dc.subject.mesh | Algorithms | en_HK |
dc.subject.mesh | Brain - anatomy & histology | en_HK |
dc.subject.mesh | Humans | en_HK |
dc.subject.mesh | Image Enhancement - methods | en_HK |
dc.subject.mesh | Imaging, Three-Dimensional - methods | en_HK |
dc.subject.mesh | Magnetic Resonance Imaging - instrumentation - methods | en_HK |
dc.subject.mesh | Phantoms, Imaging | en_HK |
dc.subject.mesh | Quality Control | en_HK |
dc.subject.mesh | Signal Processing, Computer-Assisted | en_HK |
dc.subject.mesh | Subtraction Technique | en_HK |
dc.title | Combined MR data acquisition of multicontrast images using variable acquisition parameters and K-space data sharing | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+sharing | en_HK |
dc.identifier.email | Wu, EX:ewu1@hkucc.hku.hk | en_HK |
dc.identifier.authority | Wu, EX=rp00193 | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1109/TMI.2003.815054 | en_HK |
dc.identifier.pmid | 12906235 | - |
dc.identifier.scopus | eid_2-s2.0-0642336606 | en_HK |
dc.identifier.hkuros | 90221 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0642336606&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 22 | en_HK |
dc.identifier.issue | 7 | en_HK |
dc.identifier.spage | 806 | en_HK |
dc.identifier.epage | 823 | en_HK |
dc.identifier.isi | WOS:000184443900003 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Mékle, R=6506702350 | en_HK |
dc.identifier.scopusauthorid | Laine, AF=26643433600 | en_HK |
dc.identifier.scopusauthorid | Wu, EX=7202128034 | en_HK |
dc.identifier.issnl | 0278-0062 | - |