Alternating steady state free precession for estimation of current-induced magnetic flux density: A feasibility study
DC Field | Value | Language |
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dc.contributor.author | Hyunyeol Lee | - |
dc.contributor.author | Jeong, Woo Chul | - |
dc.contributor.author | Kim, Hyung Joong | - |
dc.contributor.author | Woo, Eung Je | - |
dc.contributor.author | Park, Jaeseok | - |
dc.date.available | 2016-05-12T08:53:04Z | - |
dc.date.created | 2015-06-24 | - |
dc.date.issued | 2016-05 | - |
dc.identifier.issn | 0740-3194 | - |
dc.identifier.uri | https://pr.ibs.re.kr/handle/8788114/2478 | - |
dc.description.abstract | Purpose: 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.uri | 1 | - |
dc.language | 영어 | - |
dc.publisher | WILEY-BLACKWELL | - |
dc.subject | magnetic resonance imaging | - |
dc.subject | steady-state free precession | - |
dc.subject | alternating steady-state free precession | - |
dc.subject | conductivity | - |
dc.title | Alternating steady state free precession for estimation of current-induced magnetic flux density: A feasibility study | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.identifier.wosid | 000374495600017 | - |
dc.identifier.scopusid | 2-s2.0-84931864368 | - |
dc.identifier.rimsid | 20465 | ko |
dc.date.tcdate | 2018-10-01 | - |
dc.contributor.affiliatedAuthor | Hyunyeol Lee | - |
dc.identifier.doi | 10.1002/mrm.25813 | - |
dc.identifier.bibliographicCitation | MAGNETIC RESONANCE IN MEDICINE, v.75, no.5, pp.2009 - 2019 | - |
dc.citation.title | MAGNETIC RESONANCE IN MEDICINE | - |
dc.citation.volume | 75 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 2009 | - |
dc.citation.endPage | 2019 | - |
dc.date.scptcdate | 2018-10-01 | - |
dc.description.wostc | 3 | - |
dc.description.scptc | 3 | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | ELECTRICAL-IMPEDANCE TOMOGRAPHY | - |
dc.subject.keywordPlus | DIELECTRIC-PROPERTIES | - |
dc.subject.keywordPlus | BIOLOGICAL TISSUES | - |
dc.subject.keywordPlus | IN-VIVO | - |
dc.subject.keywordPlus | MREIT | - |
dc.subject.keywordPlus | NMR | - |
dc.subject.keywordPlus | CONDUCTIVITY | - |
dc.subject.keywordPlus | SIMULATION | - |
dc.subject.keywordPlus | SEQUENCES | - |
dc.subject.keywordAuthor | magnetic resonance imaging | - |
dc.subject.keywordAuthor | steady-state free precession | - |
dc.subject.keywordAuthor | alternating steady-state free precession | - |
dc.subject.keywordAuthor | conductivity | - |