An actively decoupled dual transceiver coil system for continuous ASL at 7 T
DC Field | Value | Language |
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dc.contributor.author | Stafford, Randall B. | - |
dc.contributor.author | Woo, Myung-Kyun | - |
dc.contributor.author | Oh, Se-Hong | - |
dc.contributor.author | Dolui, Sudipto | - |
dc.contributor.author | Zhao, Tiejun | - |
dc.contributor.author | Kim, Young-Bo | - |
dc.contributor.author | Detre, John A. | - |
dc.contributor.author | Cho, Zang-Hee | - |
dc.contributor.author | Lee, Jongho | - |
dc.date.available | 2020-02-28T01:44:27Z | - |
dc.date.created | 2020-02-06 | - |
dc.date.issued | 2016-06 | - |
dc.identifier.issn | 0899-9457 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/8209 | - |
dc.description.abstract | 7 T arterial spin labeling (ASL) faces major challenges including the increased specific absorption rate (SAR) and increased B-0 and B-1 inhomogeneity. This work describes the design and implementation of a dual-coil system that allows for continuous ASL (CASL) at 7 T. This system consisted of an actively detunable eight-channel transceiver head coil, and a three-channel transceiver labeling coil. Four experiments were performed in 5 healthy subjects: (i) to demonstrate that active detuning during ASL labeling reduces magnetization transfer; (ii) to measure the B-1 profile at the labeling plane; (iii) to quantify B-0 off-resonance at the labeling plane; and (iv) to collect in vivo CASL data. The magnetization transfer ratio in the head coil was reduced to 0.0 +/- 0.2% by active detuning during labeling. The measured B-1 profiles in all 5 subjects were sufficient to satisfy the flow-driven adiabatic inversion necessary for CASL, however the actual labeling efficiency was significantly impacted by B-0 off-resonance at the labeling plane. The measured CASL percent signal change in gray matter (0.94%+/- 0.10%) corresponds with the low labeling efficiency predicted by the B-0 off-resonance. This work demonstrates progress in the technical implementation of 7 T CASL, and reinforces the need for improved B-0 homogeneity at the labeling plane. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | WILEY-BLACKWELL | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY | - |
dc.subject | CEREBRAL-BLOOD-FLOW | - |
dc.subject | ULTRA-HIGH FIELD | - |
dc.subject | MAGNETIC-FIELD | - |
dc.subject | PERFUSION MRI | - |
dc.subject | TRANSIT-TIME | - |
dc.subject | NOISE RATIO | - |
dc.subject | IN-VIVO | - |
dc.subject | ARTERIAL | - |
dc.subject | BRAIN | - |
dc.subject | INVERSION | - |
dc.title | An actively decoupled dual transceiver coil system for continuous ASL at 7 T | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000379066800002 | - |
dc.identifier.doi | 10.1002/ima.22165 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, v.26, no.2, pp.106 - 115 | - |
dc.identifier.scopusid | 2-s2.0-84975229322 | - |
dc.citation.endPage | 115 | - |
dc.citation.startPage | 106 | - |
dc.citation.title | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY | - |
dc.citation.volume | 26 | - |
dc.citation.number | 2 | - |
dc.contributor.affiliatedAuthor | Woo, Myung-Kyun | - |
dc.contributor.affiliatedAuthor | Kim, Young-Bo | - |
dc.contributor.affiliatedAuthor | Cho, Zang-Hee | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | magnetic resonance imaging | - |
dc.subject.keywordAuthor | arterial spin labeling | - |
dc.subject.keywordAuthor | 7 T | - |
dc.subject.keywordAuthor | specific absorption rate | - |
dc.subject.keywordAuthor | labeling coils | - |
dc.subject.keywordAuthor | B-1-mapping | - |
dc.subject.keywordAuthor | B-0-mapping | - |
dc.subject.keywordPlus | CEREBRAL-BLOOD-FLOW | - |
dc.subject.keywordPlus | ULTRA-HIGH FIELD | - |
dc.subject.keywordPlus | MAGNETIC-FIELD | - |
dc.subject.keywordPlus | PERFUSION MRI | - |
dc.subject.keywordPlus | TRANSIT-TIME | - |
dc.subject.keywordPlus | NOISE RATIO | - |
dc.subject.keywordPlus | IN-VIVO | - |
dc.subject.keywordPlus | ARTERIAL | - |
dc.subject.keywordPlus | BRAIN | - |
dc.subject.keywordPlus | INVERSION | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Optics | - |
dc.relation.journalResearchArea | Imaging Science & Photographic Technology | - |
dc.relation.journalWebOfScienceCategory | Engineering, Electrical & Electronic | - |
dc.relation.journalWebOfScienceCategory | Optics | - |
dc.relation.journalWebOfScienceCategory | Imaging Science & Photographic Technology | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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