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Article: Capacitively decoupled tunable loop microstrip (TLM) array at 7 T

TitleCapacitively decoupled tunable loop microstrip (TLM) array at 7 T
Authors
Issue Date2007
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/mri
Citation
Magnetic Resonance Imaging, 2007, v. 25 n. 3, p. 418-424 How to Cite?
AbstractMicrostrip transmission-line loop arrays have been recently proposed for parallel imaging at ultrahigh fields due to their advantages in element decoupling and to their increased coil quality factor. In the microstrip loop array design, interconnecting capacitors become necessary to further improve the decoupling between the adjacent elements when nonoverlapped loops are placed densely. However, at ultrahigh fields, the capacitance required for sufficient decoupling is very small. Hence, the isolations between the elements are usually not optimized and the array is extremely sensitive to the load. In this study, a theoretical model is developed to analyze the capacitive decoupling circuit. Then, a novel tunable loop microstrip (TLM) array that can accommodate capacitive decoupling more easily at ultrahigh fields is proposed. As an example, a four-element TLM array is constructed at 7 T. In this array, the decoupling capacitance is increased to a more reasonable value. Isolation between the adjacent elements is better than -37 dB with the load. The performance of this TLM array is also demonstrated by MRI experiments.
Persistent Identifierhttp://hdl.handle.net/10722/74056
ISSN
2015 Impact Factor: 1.98
2015 SCImago Journal Rankings: 1.139

 

DC FieldValueLanguage
dc.contributor.authorWu, Ben_HK
dc.contributor.authorZhang, XLen_HK
dc.contributor.authorQu, Pen_HK
dc.contributor.authorShen, GGen_HK
dc.date.accessioned2010-09-06T06:57:22Z-
dc.date.available2010-09-06T06:57:22Z-
dc.date.issued2007en_HK
dc.identifier.citationMagnetic Resonance Imaging, 2007, v. 25 n. 3, p. 418-424en_HK
dc.identifier.issn0730-725Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/74056-
dc.description.abstractMicrostrip transmission-line loop arrays have been recently proposed for parallel imaging at ultrahigh fields due to their advantages in element decoupling and to their increased coil quality factor. In the microstrip loop array design, interconnecting capacitors become necessary to further improve the decoupling between the adjacent elements when nonoverlapped loops are placed densely. However, at ultrahigh fields, the capacitance required for sufficient decoupling is very small. Hence, the isolations between the elements are usually not optimized and the array is extremely sensitive to the load. In this study, a theoretical model is developed to analyze the capacitive decoupling circuit. Then, a novel tunable loop microstrip (TLM) array that can accommodate capacitive decoupling more easily at ultrahigh fields is proposed. As an example, a four-element TLM array is constructed at 7 T. In this array, the decoupling capacitance is increased to a more reasonable value. Isolation between the adjacent elements is better than -37 dB with the load. The performance of this TLM array is also demonstrated by MRI experiments.-
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/mrien_HK
dc.relation.ispartofMagnetic Resonance Imagingen_HK
dc.rightsMagnetic Resonance Imaging. Copyright © Elsevier Inc.en_HK
dc.titleCapacitively decoupled tunable loop microstrip (TLM) array at 7 Ten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0730-725X&volume=V 25 issue 3&spage=418&epage=424&date=2007&atitle=Capacitively+Decoupled+Tunable+Loop+Microstrp+(tlm)+Array+At+7ten_HK
dc.identifier.emailShen, GG: gxshen@eee.hku.hken_HK
dc.identifier.authorityShen, GG=rp00166en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid17371734-
dc.identifier.hkuros137400en_HK

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