Show simple item record

dc.contributor.authorHafalir, F. S.en_US
dc.contributor.authorOran, O. F.en_US
dc.contributor.authorGurler, N.en_US
dc.contributor.authorIder, Y. Z.en_US
dc.date.accessioned2016-02-08T11:00:16Z
dc.date.available2016-02-08T11:00:16Z
dc.date.issued2014en_US
dc.identifier.issn0278-0062
dc.identifier.urihttp://hdl.handle.net/11693/26471
dc.description.abstractImages of electrical conductivity and permittivity of tissues may be used for diagnostic purposes as well as for estimating local specific absorption rate distributions. Magnetic resonance electrical properties tomography (MREPT) aims at noninvasively obtaining conductivity and permittivity images at radio-frequency frequencies of magnetic resonance imaging systems. MREPT algorithms are based on measuring the B1 field which is perturbed by the electrical properties of the imaged object. In this study, the relation between the electrical properties and the measured B1 field is formulated for the first time as a well-known convection-reaction equation. The suggested novel algorithm, called 'cr-MREPT,' is based on the solution of this equation on a triangular mesh, and in contrast to previously proposed algorithms, it is applicable in practice not only for regions where electrical properties are relatively constant but also for regions where they vary. The convective field of the convection-reaction equation depends on the spatial derivatives of the B1 field, and in the regions where its magnitude is low, a spot-like artifact is observed in the reconstructed electrical properties images. For eliminating this artifact, two different methods are developed, namely 'constrained cr-MREPT' and 'double-excitation cr-MREPT.' Successful reconstructions are obtained using noisy and noise-free simulated data, and experimental data from phantoms.en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Transactions on Medical Imagingen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TMI.2013.2296715en_US
dc.subjectB1 mappingen_US
dc.subjectConductivity imagingen_US
dc.subjectConvection-reaction equationen_US
dc.subjectElectrical impedance tomography (EIT)en_US
dc.subjectMagnetic resonance electrical impedance tomography (MREIT)en_US
dc.subjectPermittivity imagingen_US
dc.subjectQuantitative magnetic resonance imaging (MRI)en_US
dc.subjectTriangular meshen_US
dc.subjectAlgorithmsen_US
dc.subjectElectric impedanceen_US
dc.subjectElectric impedance tomographyen_US
dc.subjectPermittivityen_US
dc.subjectB1 mappingen_US
dc.subjectConductivity imagingen_US
dc.subjectConvection-reaction equationen_US
dc.subjectElectrical impe dance tomography (EIT)en_US
dc.subjectMagnetic resonance electrical impedance tomographiesen_US
dc.subjectQuantitative magnetic resonance imagingen_US
dc.subjectTriangular meshesen_US
dc.subjectMagnetic resonance imagingen_US
dc.subjectComputer assisted impedance tomographyen_US
dc.subjectConductanceen_US
dc.subjectConvection reaction equation based resonance property tomographyen_US
dc.subjectElectric conductivityen_US
dc.subjectNuclear magnetic resonanceen_US
dc.subjectNuclear magnetic resonance imagingen_US
dc.subjectRadiological parametersen_US
dc.subjectTomographyen_US
dc.subjectBrainen_US
dc.subjectElectric Impedanceen_US
dc.subjectHumansen_US
dc.subjectMagnetic Resonance Imagingen_US
dc.titleConvection-reaction equation based magnetic resonance electrical properties tomography (cr-MREPT)en_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineering
dc.citation.spage777en_US
dc.citation.epage793en_US
dc.citation.volumeNumber33en_US
dc.citation.issueNumber3en_US
dc.identifier.doi10.1109/TMI.2013.2296715en_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record