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Alternating steady state free precession for estimation of current-induced magnetic flux density: A feasibility study

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dc.contributor.authorHyunyeol Lee-
dc.contributor.authorJeong, Woo Chul-
dc.contributor.authorKim, Hyung Joong-
dc.contributor.authorWoo, Eung Je-
dc.contributor.authorPark, Jaeseok-
dc.date.available2016-05-12T08:53:04Z-
dc.date.created2015-06-24-
dc.date.issued2016-05-
dc.identifier.issn0740-3194-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/2478-
dc.description.abstractPurpose: To develop a novel, current-controlled alternating steady-state free precession (SSFP)-based conductivity imaging method and corresponding MR signal models to estimate current-induced magnetic flux density (Bz) and conductivity distribution. Methods: In the proposed method, an SSFP pulse sequence, which is in sync with alternating current pulses, produces dual oscillating steady states while yielding nonlinear relation between signal phase and Bz. A ratiometric signal model between the states was analytically derived using the Bloch equation, wherein Bz was estimated by solving a nonlinear inverse problem for conductivity estimation. A theoretical analysis on the signal-to-noise ratio of Bz was given. Numerical and experimental studies were performed using SSFP-FID and SSFP-ECHO with current pulses positioned either before or after signal encoding to investigate the feasibility of the proposed method in conductivity estimation. Results: Given all SSFP variants herein, SSFP-FID with alternating current pulses applied before signal encoding exhibits the highest Bz signal-to-noise ratio and conductivity contrast. Additionally, compared with conventional conductivity imaging, the proposed method benefits from rapid SSFP acquisition without apparent loss of conductivity contrast. Conclusion: We successfully demonstrated the feasibility of the proposed method in estimating current-induced Bz and conductivity distribution. It can be a promising, rapid imaging strategy for quantitative conductivity imaging. Magn Reson Med 75(5) : 2009-2019. (C) 2015 Wiley Periodicals, Inc.-
dc.description.uri1-
dc.language영어-
dc.publisherWILEY-BLACKWELL-
dc.subjectmagnetic resonance imaging-
dc.subjectsteady-state free precession-
dc.subjectalternating steady-state free precession-
dc.subjectconductivity-
dc.titleAlternating steady state free precession for estimation of current-induced magnetic flux density: A feasibility study-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000374495600017-
dc.identifier.scopusid2-s2.0-84931864368-
dc.identifier.rimsid20465ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorHyunyeol Lee-
dc.identifier.doi10.1002/mrm.25813-
dc.identifier.bibliographicCitationMAGNETIC RESONANCE IN MEDICINE, v.75, no.5, pp.2009 - 2019-
dc.citation.titleMAGNETIC RESONANCE IN MEDICINE-
dc.citation.volume75-
dc.citation.number5-
dc.citation.startPage2009-
dc.citation.endPage2019-
dc.date.scptcdate2018-10-01-
dc.description.wostc3-
dc.description.scptc3-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.subject.keywordPlusELECTRICAL-IMPEDANCE TOMOGRAPHY-
dc.subject.keywordPlusDIELECTRIC-PROPERTIES-
dc.subject.keywordPlusBIOLOGICAL TISSUES-
dc.subject.keywordPlusIN-VIVO-
dc.subject.keywordPlusMREIT-
dc.subject.keywordPlusNMR-
dc.subject.keywordPlusCONDUCTIVITY-
dc.subject.keywordPlusSIMULATION-
dc.subject.keywordPlusSEQUENCES-
dc.subject.keywordAuthormagnetic resonance imaging-
dc.subject.keywordAuthorsteady-state free precession-
dc.subject.keywordAuthoralternating steady-state free precession-
dc.subject.keywordAuthorconductivity-
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
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