A correction method for streak artifacts in gradient-echo EPI using spin-echo EPI reference data

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dc.contributor.authorChung, Jun-Youngko
dc.contributor.authorHan, Yejiko
dc.contributor.authorCho, Zang-Heeko
dc.contributor.authorPark, HyunWookko
dc.date.accessioned2013-03-11T15:32:06Z-
dc.date.available2013-03-11T15:32:06Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2012-06-
dc.identifier.citationMAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE, v.25, no.3, pp.205 - 213-
dc.identifier.issn0968-5243-
dc.identifier.urihttp://hdl.handle.net/10203/99478-
dc.description.abstractTo analyze the streak artifacts in a gradient-echo echo planar imaging (GE-EPI) sequence and to propose a correction method for the Nyquist ghost artifacts that does not cause streak artifacts in the GE-EPI imaging. Several GE-EPI imaging experiments with various reference scans, using both GE-EPI and SE-EPI scan data, were performed to analyze the streak artifacts and to investigate the spin dephasing phenomena of the GE-EPI reference scan. In addition, the analysis based on the spin dephasing was undertaken in order to demonstrate that the SE-EPI reference data can be used for the correction of the GE-EPI main scan data. The experimental results confirmed that the improvement of the reference data using either signal averaging or a large flip angle cannot guarantee perfect correction of the streak artifact if the noise is not completely removed. Due to the main field inhomogeneity, the spins of the GE-EPI reference data were dephased in multiple echo signals. The proposed correction method, which uses a SE-EPI reference scan for the GE-EPI images, eliminates the N/2 ghost artifacts without producing streak artifacts. It is believed that the proposed phase error correction scheme can improve the EPI performance in high field MRIs with higher magnetic field inhomogeneities.-
dc.languageEnglish-
dc.publisherSPRINGER-
dc.subjectNYQUIST GHOST ARTIFACTS-
dc.subjectPHASE CORRECTION-
dc.subjectREFERENCE-SCAN-
dc.subjectGEOMETRIC DISTORTION-
dc.subjectIMAGE-RECONSTRUCTION-
dc.subjectREDUCTION-
dc.subjectELIMINATION-
dc.subjectLOSSES-
dc.titleA correction method for streak artifacts in gradient-echo EPI using spin-echo EPI reference data-
dc.typeArticle-
dc.identifier.wosid000304620300004-
dc.identifier.scopusid2-s2.0-84862020217-
dc.type.rimsART-
dc.citation.volume25-
dc.citation.issue3-
dc.citation.beginningpage205-
dc.citation.endingpage213-
dc.citation.publicationnameMAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE-
dc.identifier.doi10.1007/s10334-011-0289-0-
dc.contributor.localauthorPark, HyunWook-
dc.contributor.nonIdAuthorChung, Jun-Young-
dc.contributor.nonIdAuthorCho, Zang-Hee-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorEcho planar imaging (EPI)-
dc.subject.keywordAuthorStreak artifacts-
dc.subject.keywordAuthorNyquist ghost artifact-
dc.subject.keywordAuthorGradient-echo EPI-
dc.subject.keywordAuthorSpin-echo EPI reference scan-
dc.subject.keywordAuthorField inhomogeneity in high field MRI-
dc.subject.keywordPlusNYQUIST GHOST ARTIFACTS-
dc.subject.keywordPlusPHASE CORRECTION-
dc.subject.keywordPlusREFERENCE-SCAN-
dc.subject.keywordPlusGEOMETRIC DISTORTION-
dc.subject.keywordPlusIMAGE-RECONSTRUCTION-
dc.subject.keywordPlusREDUCTION-
dc.subject.keywordPlusELIMINATION-
dc.subject.keywordPlusLOSSES-
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