A study on multiple array method of birdcage coils to improve the signal intensity and homogeneity in small-animal whole-body magnetic resonance imaging at 7 T
DC Field | Value | Language |
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dc.contributor.author | Heo, Phil | - |
dc.contributor.author | Kim, Han-Joong | - |
dc.contributor.author | Han, Sang-Doc | - |
dc.contributor.author | Kim, Donghyuk | - |
dc.contributor.author | Im, Geun Ho | - |
dc.contributor.author | Kim, Soobum | - |
dc.contributor.author | Kim, Kyoung-Nam | - |
dc.date.available | 2020-03-03T06:42:06Z | - |
dc.date.created | 2020-02-24 | - |
dc.date.issued | 2020-03 | - |
dc.identifier.issn | 0899-9457 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/17601 | - |
dc.description.abstract | Birdcage (BC) coils generate a homogeneous magnetic field ( divide B-1 divide ), whose strength depends on the length of the coils, the number of legs, the resonance frequency, the excitation method, and the length-to-diameter ratio. BC coils with a shorter distance between the end rings produce a more intense divide B-1 divide field with a higher level of homogeneity. Here, we propose a combination of overlapping and nonoverlapping radiofrequency volumetric BC coils for small-animal magnetic resonance imaging (MRI) working at 7 T with a frequency of 300 MHz to improve the divide B-1 divide -field homogeneity and intensity along the main magnetic field ( divide B-0 divide ) direction. The first combination consisted of two overlapping BC (o-BC) coils, in which each coil is half the length of the imaging object. A combination of two nonoverlapping BC coils separated by a small gap (nog-BC) was also developed. In order to improve the performance of the nog-BC coil, we attached a decoupling capacitor. In computational calculations, the proposed o-BC coil configuration showed an increased homogeneity in the divide B-1 divide field along the divide B-0 divide direction compared with the other coils. The experimental bench tests of the o-BC coil configuration showed a high decoupling coefficient between the BC coils, which allowed each of them to be used individually for transmission and reception. The o-BC coil was able to maintain a high transmission efficiency without signal interference while exhibiting an increased divide B-1 divide -field homogeneity compared with other coils. In this study, the advantages of the o-BC coils are demonstrated using electromagnetic simulations and MRI on a homogenous phantom and an in vivo mouse body. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | WILEY | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY | - |
dc.subject | MRI | - |
dc.subject | SCINTIGRAPHY | - |
dc.subject | ACQUISITION | - |
dc.title | A study on multiple array method of birdcage coils to improve the signal intensity and homogeneity in small-animal whole-body magnetic resonance imaging at 7 T | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000501487300001 | - |
dc.identifier.doi | 10.1002/ima.22383 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, v.30, no.1, pp.31 - 44 | - |
dc.identifier.scopusid | 2-s2.0-85075777767 | - |
dc.citation.endPage | 44 | - |
dc.citation.startPage | 31 | - |
dc.citation.title | INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY | - |
dc.citation.volume | 30 | - |
dc.citation.number | 1 | - |
dc.contributor.affiliatedAuthor | Heo, Phil | - |
dc.contributor.affiliatedAuthor | Kim, Han-Joong | - |
dc.contributor.affiliatedAuthor | Han, Sang-Doc | - |
dc.contributor.affiliatedAuthor | Kim, Donghyuk | - |
dc.contributor.affiliatedAuthor | Kim, Soobum | - |
dc.contributor.affiliatedAuthor | Kim, Kyoung-Nam | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | birdcage | - |
dc.subject.keywordAuthor | EM simulation | - |
dc.subject.keywordAuthor | magnetic resonance imaging | - |
dc.subject.keywordPlus | MRI | - |
dc.subject.keywordPlus | SCINTIGRAPHY | - |
dc.subject.keywordPlus | ACQUISITION | - |
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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