DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chung, Jun-Young | ko |
dc.contributor.author | Han, Yeji | ko |
dc.contributor.author | Cho, Zang-Hee | ko |
dc.contributor.author | Park, HyunWook | ko |
dc.date.accessioned | 2013-03-11T15:32:06Z | - |
dc.date.available | 2013-03-11T15:32:06Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2012-06 | - |
dc.identifier.citation | MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE, v.25, no.3, pp.205 - 213 | - |
dc.identifier.issn | 0968-5243 | - |
dc.identifier.uri | http://hdl.handle.net/10203/99478 | - |
dc.description.abstract | To 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.language | English | - |
dc.publisher | SPRINGER | - |
dc.subject | NYQUIST GHOST ARTIFACTS | - |
dc.subject | PHASE CORRECTION | - |
dc.subject | REFERENCE-SCAN | - |
dc.subject | GEOMETRIC DISTORTION | - |
dc.subject | IMAGE-RECONSTRUCTION | - |
dc.subject | REDUCTION | - |
dc.subject | ELIMINATION | - |
dc.subject | LOSSES | - |
dc.title | A correction method for streak artifacts in gradient-echo EPI using spin-echo EPI reference data | - |
dc.type | Article | - |
dc.identifier.wosid | 000304620300004 | - |
dc.identifier.scopusid | 2-s2.0-84862020217 | - |
dc.type.rims | ART | - |
dc.citation.volume | 25 | - |
dc.citation.issue | 3 | - |
dc.citation.beginningpage | 205 | - |
dc.citation.endingpage | 213 | - |
dc.citation.publicationname | MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE | - |
dc.identifier.doi | 10.1007/s10334-011-0289-0 | - |
dc.contributor.localauthor | Park, HyunWook | - |
dc.contributor.nonIdAuthor | Chung, Jun-Young | - |
dc.contributor.nonIdAuthor | Cho, Zang-Hee | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Echo planar imaging (EPI) | - |
dc.subject.keywordAuthor | Streak artifacts | - |
dc.subject.keywordAuthor | Nyquist ghost artifact | - |
dc.subject.keywordAuthor | Gradient-echo EPI | - |
dc.subject.keywordAuthor | Spin-echo EPI reference scan | - |
dc.subject.keywordAuthor | Field inhomogeneity in high field MRI | - |
dc.subject.keywordPlus | NYQUIST GHOST ARTIFACTS | - |
dc.subject.keywordPlus | PHASE CORRECTION | - |
dc.subject.keywordPlus | REFERENCE-SCAN | - |
dc.subject.keywordPlus | GEOMETRIC DISTORTION | - |
dc.subject.keywordPlus | IMAGE-RECONSTRUCTION | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | ELIMINATION | - |
dc.subject.keywordPlus | LOSSES | - |
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