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dc.contributor.authorReci, A
dc.contributor.authorde Kort, Daan
dc.contributor.authorSederman, Andy
dc.contributor.authorGladden, Lynn
dc.date.accessioned2018-11-22T00:31:04Z
dc.date.available2018-11-22T00:31:04Z
dc.date.issued2018-11
dc.identifier.issn1090-7807
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285606
dc.description.abstractObtaining quantitative, 3D spatially-resolved T2 distributions (T2 maps) from magnetic resonance data is of importance in both medical and porous media applications. Due to the long acquisition time, there is considerable interest in accelerating the experiments by applying undersampling schemes during the acquisition and developing reconstruction techniques for obtaining the 3D T2 maps from the undersampled data. A multi-echo spin echo pulse sequence is used in this work to acquire the undersampled data according to two different sampling patterns: a conventional coherent sampling pattern where the same set of lines in k-space is sampled for all equally-spaced echoes in the echo train, and a proposed incoherent sampling pattern where an independent set of k-space lines is sampled for each echo. The conventional reconstruction technique of total variation regularization is compared to the more recent techniques of nuclear norm regularization and Nuclear Total Generalized Variation (NTGV) regularization. It is shown that best reconstructions are obtained when the data acquired using an incoherent sampling scheme are processed using NTGV regularization. Using an incoherent sampling pattern and NTGV regularization as the reconstruction technique, quantitative results are obtained at sampling percentages as low as 3.1% of k-space, corresponding to a 32-fold decrease in the acquisition time, compared to a fully sampled dataset.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherElsevier BV
dc.titleAccelerating the estimation of 3D spatially resolved T2 distributions.
dc.typeArticle
prism.endingPage102
prism.publicationDate2018
prism.publicationNameJ Magn Reson
prism.startingPage93
prism.volume296
dc.identifier.doi10.17863/CAM.32960
dcterms.dateAccepted2018-08-24
rioxxterms.versionofrecord10.1016/j.jmr.2018.08.008
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-11
dc.contributor.orcidde Kort, Daan [0000-0002-8831-2011]
dc.contributor.orcidSederman, Andy [0000-0002-7866-5550]
dc.contributor.orcidGladden, Lynn [0000-0001-9519-0406]
dc.identifier.eissn1096-0856
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K039318/1)
rioxxterms.freetoread.startdate2019-08-28


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