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dc.contributor.authorNguyen, Hien M.
dc.contributor.authorSutton, Bradley P.
dc.contributor.authorMorrison, Robert L., Jr.
dc.contributor.authorDo, Minh N.
dc.date.accessioned2010-11-23T19:37:32Z
dc.date.available2010-11-23T19:37:32Z
dc.date.issued2009-02
dc.date.submitted2008-04
dc.identifier.issn0278-0062
dc.identifier.otherINSPEC Accession Number: 10499589
dc.identifier.urihttp://hdl.handle.net/1721.1/60035
dc.description.abstractMagnetic resonance imaging (MRI) uses applied spatial variations in the magnetic field to encode spatial position. Therefore, nonuniformities in the main magnetic field can cause image distortions. In order to correct the image distortions, it is desirable to simultaneously acquire data with a field map in registration. We propose a joint estimation (JE) framework with a fast, noniterative approach using harmonic retrieval (HR) methods, combined with a multi-echo echo-planar imaging (EPI) acquisition. The connection with HR establishes an elegant framework to solve the JE problem through a sequence of 1-D HR problems in which efficient solutions are available. We also derive the condition on the smoothness of the field map in order for HR techniques to recover the image with high signal-to-noise ratio. Compared to other dynamic field mapping methods, this method is not constrained by the absolute level of the field inhomogeneity over the slice, but relies on a generous pixel-to-pixel smoothness. Moreover, this method can recover image, field map, and T2* map simultaneously.en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Grant CCF- 0430877)en_US
dc.language.isoen_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TMI.2008.2006530en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceIEEEen_US
dc.titleJoint estimation and correction of geometric distortions for EPI functional MRI using harmonic retrievalen_US
dc.typeArticleen_US
dc.identifier.citationNguyen, H.M. et al. “Joint Estimation and Correction of Geometric Distortions for EPI Functional MRI Using Harmonic Retrieval.” Medical Imaging, IEEE Transactions on 28.3 (2009): 423-434. © Copyright 2009en_US
dc.contributor.departmentLincoln Laboratoryen_US
dc.contributor.approverMorrison, Robert L., Jr.
dc.contributor.mitauthorMorrison, Robert L., Jr.
dc.relation.journalIEEE Transactions on Medical Imagingen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsNguyen, H.M.; Sutton, B.P.; Morrison, R.L.; Do, M.N.en
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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