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Rapid calculation of static magnetic field perturbation generated by magnetized objects in arbitrary orientations

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dc.contributor.authorYeo, Seok-Jin-
dc.contributor.authorLee, So-Hee-
dc.contributor.authorSeung-Kyun Lee-
dc.date.accessioned2021-12-02T07:30:00Z-
dc.date.available2021-12-02T07:30:00Z-
dc.date.created2021-11-01-
dc.date.issued2022-02-
dc.identifier.issn0740-3194-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/10752-
dc.description.abstract© 2021 International Society for Magnetic Resonance in MedicinePurpose: Most previous work on the calculation of susceptibility-induced static magnetic field (B0) inhomogeneity has considered strictly unidirectional magnetic fields. Here, we present the theory and implementation of a computational method to rapidly calculate static magnetic field vectors produced by an arbitrary distribution of voxelated magnetization vectors. Theory and Methods: Two existing B0 calculation methods were systematically extended to include arbitrary orientations of the magnetization and the magnetic field; they are (1) Fourier-domain convolution with k-space-discretized (KD) dipolar field, and (2) generalized susceptibility voxel convolution (gSVC). The methods were tested on an analytical ellipsoid model and a tilted human head model, as well as against experimentally measured B0 fields induced by a stainless-steel implant located in an inhomogeneous region of a clinical 3T MRI magnet. Results: Both methods were capable of correctly calculating B0 fields inside a magnetized ellipsoid in all tested orientations. The KD method generally required a larger grid and longer computation time to achieve accuracy comparable to gSVC. Measured B0 fields due to the implant showed a good match with the gSVC-calculated fields that accounted for the spatial variation of the applied magnetic field including the radial components. Conclusion: Our method can provide a reliable and efficient computational tool to calculate B0 perturbation by magnetized objects under a variety of circumstances, including those with inhomogeneous magnetizing fields, anisotropic susceptibility, and a rotated coordinate system.-
dc.language영어-
dc.publisherJohn Wiley and Sons Inc-
dc.titleRapid calculation of static magnetic field perturbation generated by magnetized objects in arbitrary orientations-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000704308300001-
dc.identifier.scopusid2-s2.0-85116436192-
dc.identifier.rimsid76530-
dc.contributor.affiliatedAuthorSeung-Kyun Lee-
dc.identifier.doi10.1002/mrm.29037-
dc.identifier.bibliographicCitationMagnetic Resonance in Medicine, v.87, no.2, pp.1015 - 1027-
dc.relation.isPartOfMagnetic Resonance in Medicine-
dc.citation.titleMagnetic Resonance in Medicine-
dc.citation.volume87-
dc.citation.number2-
dc.citation.startPage1015-
dc.citation.endPage1027-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.description.journalClass1-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaRadiology, Nuclear Medicine & Medical Imaging-
dc.relation.journalWebOfScienceCategoryRadiology, Nuclear Medicine & Medical Imaging-
dc.subject.keywordPlusMAP-
dc.subject.keywordPlusSUSCEPTIBILITY-
dc.subject.keywordPlusINHOMOGENEITY-
dc.subject.keywordPlusMRI-
dc.subject.keywordPlusEFFICIENT-
dc.subject.keywordPlusCOMPACT-
dc.subject.keywordPlusIMAGE-
dc.subject.keywordAuthorB0 map-
dc.subject.keywordAuthordipolar field-
dc.subject.keywordAuthorsusceptibility voxel convolution (SVC)-
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
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