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Article: Performance of large-size superconducting coil in 0.21T MRI system

TitlePerformance of large-size superconducting coil in 0.21T MRI system
Authors
KeywordsHigh-temperature superconducting (HTS)
Magnetic resonance imaging (MRI)
Surface receiver coil
Issue Date2004
PublisherIEEE.
Citation
Ieee Transactions On Biomedical Engineering, 2004, v. 51 n. 11, p. 2024-2030 How to Cite?
AbstractA high-temperature superconductor (HTS) was used on magnetic resonance imaging (MRI) receiver coils to improve image quality because of its intrinsic low electrical resistivity [1], [2]. Typical HTS coils are surface coils made of HTS thin-film wafers. Their applications are severely limited by the field of view (FOV) of the surface coil configuration, and the improvement in image quality by HTS coil is also reduced as the ratio of sample noise to coil noise increases. Therefore, previous HTS coils are usually used to image small in vitro samples, small animals, or peripheral human anatomies [3]-[5]. We used large-size HTS coils (2.5-, 3.5-, and 5.5-in mean diameter) to enhance the FOV and we evaluated their performance through phantom and human MR images. Comparisons were made among HTS surface coils, copper surface coils, and cool copper surface coils in terms of the signal-to-noise ratio (SNR) and sensitivity profile of the images. A theoretical model prediction was also used to compare against the experimental result. We then selected several human body parts, including the wrist, feet, and head, to illustrate the advantage of HTS coil over copper coil when used in human imaging. The results show an SNR gain of 200% for 5.5-in HTS coil versus same size copper coils, while for 2.5- and 3.5-in coils it is 250%. We also address the various factors that affect the performance of large size HTS coils, including the coil-to-sample spacing due to cryogenic probe and the coil-loading effect.
Persistent Identifierhttp://hdl.handle.net/10722/44732
ISSN
2015 Impact Factor: 2.468
2015 SCImago Journal Rankings: 1.201
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLee, KHen_HK
dc.contributor.authorCheng, MCen_HK
dc.contributor.authorChan, KCen_HK
dc.contributor.authorWong, KKen_HK
dc.contributor.authorYeung, SSMen_HK
dc.contributor.authorLee, KCen_HK
dc.contributor.authorMa, QYen_HK
dc.contributor.authorYang, ESen_HK
dc.date.accessioned2007-10-30T06:09:00Z-
dc.date.available2007-10-30T06:09:00Z-
dc.date.issued2004en_HK
dc.identifier.citationIeee Transactions On Biomedical Engineering, 2004, v. 51 n. 11, p. 2024-2030en_HK
dc.identifier.issn0018-9294en_HK
dc.identifier.urihttp://hdl.handle.net/10722/44732-
dc.description.abstractA high-temperature superconductor (HTS) was used on magnetic resonance imaging (MRI) receiver coils to improve image quality because of its intrinsic low electrical resistivity [1], [2]. Typical HTS coils are surface coils made of HTS thin-film wafers. Their applications are severely limited by the field of view (FOV) of the surface coil configuration, and the improvement in image quality by HTS coil is also reduced as the ratio of sample noise to coil noise increases. Therefore, previous HTS coils are usually used to image small in vitro samples, small animals, or peripheral human anatomies [3]-[5]. We used large-size HTS coils (2.5-, 3.5-, and 5.5-in mean diameter) to enhance the FOV and we evaluated their performance through phantom and human MR images. Comparisons were made among HTS surface coils, copper surface coils, and cool copper surface coils in terms of the signal-to-noise ratio (SNR) and sensitivity profile of the images. A theoretical model prediction was also used to compare against the experimental result. We then selected several human body parts, including the wrist, feet, and head, to illustrate the advantage of HTS coil over copper coil when used in human imaging. The results show an SNR gain of 200% for 5.5-in HTS coil versus same size copper coils, while for 2.5- and 3.5-in coils it is 250%. We also address the various factors that affect the performance of large size HTS coils, including the coil-to-sample spacing due to cryogenic probe and the coil-loading effect.en_HK
dc.format.extent1404393 bytes-
dc.format.extent1771 bytes-
dc.format.extent1769 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.relation.ispartofIEEE Transactions on Biomedical Engineeringen_HK
dc.rights©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectHigh-temperature superconducting (HTS)en_HK
dc.subjectMagnetic resonance imaging (MRI)en_HK
dc.subjectSurface receiver coilen_HK
dc.subject.meshEquipment-Failure-Analysisen_HK
dc.subject.meshImage-Enhancement-instrumentationen_HK
dc.subject.meshMagnetic-Resonance-Imaging-instrumentationen_HK
dc.titlePerformance of large-size superconducting coil in 0.21T MRI systemen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0018-9294&volume=51&issue=11&spage=2024&epage=2030&date=2004&atitle=Performance+of+large-size+superconducting+coil+in+0.21T+MRI+systemen_HK
dc.identifier.emailYang, ES:esyang@hkueee.hku.hken_HK
dc.identifier.authorityYang, ES=rp00199en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/TBME.2004.831539en_HK
dc.identifier.pmid15536904-
dc.identifier.scopuseid_2-s2.0-6344261818en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-6344261818&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume51en_HK
dc.identifier.issue11en_HK
dc.identifier.spage2024en_HK
dc.identifier.epage2030en_HK
dc.identifier.isiWOS:000224657100017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLee, KH=7501505976en_HK
dc.identifier.scopusauthoridCheng, MC=9747875200en_HK
dc.identifier.scopusauthoridChan, KC=34968940300en_HK
dc.identifier.scopusauthoridWong, KK=35222708000en_HK
dc.identifier.scopusauthoridYeung, SSM=7102767694en_HK
dc.identifier.scopusauthoridLee, KC=7501506841en_HK
dc.identifier.scopusauthoridMa, QY=7402815617en_HK
dc.identifier.scopusauthoridYang, ES=7202021229en_HK

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