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DC Field | Value | Language |
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dc.citation.endPage | 64 | - |
dc.citation.startPage | 57 | - |
dc.citation.title | JOURNAL OF MAGNETIC RESONANCE | - |
dc.citation.volume | 274 | - |
dc.contributor.author | Lee, DongKyu | - |
dc.contributor.author | Han, Sohyun | - |
dc.contributor.author | Cho, Hyungjoon | - |
dc.date.accessioned | 2023-12-21T22:46:36Z | - |
dc.date.available | 2023-12-21T22:46:36Z | - |
dc.date.created | 2016-11-23 | - |
dc.date.issued | 2017-01 | - |
dc.description.abstract | A variable repetition-delay (TR) spin echo sequence with repeated refocusing pulses, i.e., a variable TR turbo-spin echo (TSE), provides an attractive means of acquiring an accurate T1 map information that is free from gradient echo based artifacts such as magnetic field inhomogeneities particularly for ultra-high field (at 7T and above) preclinical applications. However, the applicability of multi-slice TSE sequences is often limited by signal distortion from T2 relaxation due to echo-train acquisitions for short T2 tissues, inter-slice cross talks and magnetization transfer (MT) from repetitive slice-selective 180° pulse, and extended scan times with multiple TR excitations. These TSE shortcomings are difficult to remedy for preclinical applications, where small sizes of target organs usually limit the slice-gap control with restricted parallel imaging capabilities. In this study, compressed-sensing-assisted turbo-spin echo (CS-TSE) acquisitions for variable TR T1 measurements at 7T preclinical scanner were implemented to reduce the echo-trains by sparse phase encodings. Following the sparse signal simulation and sampling scheme optimization, the measured T1 values from CS-TSE and TSE were compared for phantoms, ex vivo, and in vivo subjects. The phantom T1 values from CS-TSE and TSE were identical to those from the inversion recovery spin echo. For both ex vivo and in vivo multi-slice T1 mapping, the shortened echo-trains of CS-TSE relieved the T2 relaxation, reduced the inter-slice interferences of multi-slice acquisition, and made room for additional slice encodings while maintaining a shorter scan time than the conventional TSE at the expense of local image smoothness from CS regularizations. | - |
dc.identifier.bibliographicCitation | JOURNAL OF MAGNETIC RESONANCE, v.274, pp.57 - 64 | - |
dc.identifier.doi | 10.1016/j.jmr.2016.11.004 | - |
dc.identifier.issn | 1090-7807 | - |
dc.identifier.scopusid | 2-s2.0-84997532330 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/20742 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S1090780716302300 | - |
dc.identifier.wosid | 000393446000007 | - |
dc.language | 영어 | - |
dc.publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | - |
dc.title | Optimization of sparse phase encodings for variable repetition-delay turbo-spin echo (TSE) T1 measurements for preclinical applications | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Biochemical Research Methods; Physics, Atomic, Molecular & Chemical; Spectroscopy | - |
dc.relation.journalResearchArea | Biochemistry & Molecular Biology; Physics; Spectroscopy | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Compressed sensing | - |
dc.subject.keywordAuthor | Turbo-spin echo | - |
dc.subject.keywordAuthor | T-1 measurements | - |
dc.subject.keywordAuthor | TSE | - |
dc.subject.keywordAuthor | CS-TSE | - |
dc.subject.keywordAuthor | RARE | - |
dc.subject.keywordPlus | MR | - |
dc.subject.keywordPlus | T1 | - |
dc.subject.keywordPlus | RECONSTRUCTION | - |
dc.subject.keywordPlus | RELAXATION | - |
dc.subject.keywordPlus | ACCURACY | - |
dc.subject.keywordPlus | CONTRAST | - |
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