Dual optimization method of radiofrequency and quasistatic field simulations for reduction of eddy currents generated on 7T radiofrequency coil shielding.
Identifieur interne : 000097 ( PubMed/Curation ); précédent : 000096; suivant : 000098Dual optimization method of radiofrequency and quasistatic field simulations for reduction of eddy currents generated on 7T radiofrequency coil shielding.
Auteurs : Yujuan Zhao [États-Unis] ; Tiejun Zhao [États-Unis] ; Shailesh B. Raval [États-Unis] ; Narayanan Krishnamurthy [États-Unis] ; Hai Zheng [États-Unis] ; Chad T. Harris [Canada] ; William B. Handler [Canada] ; Blaine A. Chronik [Canada] ; Tamer S. Ibrahim [États-Unis]Source :
- Magnetic resonance in medicine [ 1522-2594 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
- anatomie et histologie : Encéphale.
- Champs électromagnétiques, Conception d'appareillage, Cuivre, Fantômes en imagerie, Humains, Imagerie par résonance magnétique, Ondes hertziennes, Simulation numérique.
English descriptors
- KwdEn :
- MESH :
- chemical : Copper.
- anatomy & histology : Brain.
- instrumentation : Magnetic Resonance Imaging.
- methods : Magnetic Resonance Imaging.
- Computer Simulation, Electromagnetic Fields, Equipment Design, Humans, Phantoms, Imaging, Radio Waves.
Abstract
To optimize the design of radiofrequency (RF) shielding of transmit coils at 7T and reduce eddy currents generated on the RF shielding when imaging with rapid gradient waveforms.
DOI: 10.1002/mrm.25424
PubMed: 25367703
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Raval</name><affiliation wicri:level="1"><nlm:affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania</wicri:regionArea></affiliation></author><author><name sortKey="Krishnamurthy, Narayanan" sort="Krishnamurthy, Narayanan" uniqKey="Krishnamurthy N" first="Narayanan" last="Krishnamurthy">Narayanan Krishnamurthy</name><affiliation wicri:level="1"><nlm:affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania</wicri:regionArea></affiliation></author><author><name sortKey="Zheng, Hai" sort="Zheng, Hai" uniqKey="Zheng H" first="Hai" last="Zheng">Hai Zheng</name><affiliation wicri:level="1"><nlm:affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania</wicri:regionArea></affiliation></author><author><name sortKey="Harris, Chad T" sort="Harris, Chad T" uniqKey="Harris C" first="Chad T" last="Harris">Chad T. Harris</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Physics and Astronomy, University of Western Ontario, London</wicri:regionArea></affiliation></author><author><name sortKey="Handler, William B" sort="Handler, William B" uniqKey="Handler W" first="William B" last="Handler">William B. Handler</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Physics and Astronomy, University of Western Ontario, London</wicri:regionArea></affiliation></author><author><name sortKey="Chronik, Blaine A" sort="Chronik, Blaine A" uniqKey="Chronik B" first="Blaine A" last="Chronik">Blaine A. Chronik</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Physics and Astronomy, University of Western Ontario, London</wicri:regionArea></affiliation></author><author><name sortKey="Ibrahim, Tamer S" sort="Ibrahim, Tamer S" uniqKey="Ibrahim T" first="Tamer S" last="Ibrahim">Tamer S. Ibrahim</name><affiliation wicri:level="1"><nlm:affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania</wicri:regionArea></affiliation></author></analytic><series><title level="j">Magnetic resonance in medicine</title><idno type="eISSN">1522-2594</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Brain (anatomy & histology)</term><term>Computer Simulation</term><term>Copper</term><term>Electromagnetic Fields</term><term>Equipment Design</term><term>Humans</term><term>Magnetic Resonance Imaging (instrumentation)</term><term>Magnetic Resonance Imaging (methods)</term><term>Phantoms, Imaging</term><term>Radio Waves</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Champs électromagnétiques</term><term>Conception d'appareillage</term><term>Cuivre</term><term>Encéphale (anatomie et histologie)</term><term>Fantômes en imagerie</term><term>Humains</term><term>Imagerie par résonance magnétique ()</term><term>Imagerie par résonance magnétique (instrumentation)</term><term>Ondes hertziennes</term><term>Simulation numérique</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Copper</term></keywords><keywords scheme="MESH" qualifier="anatomie et histologie" xml:lang="fr"><term>Encéphale</term></keywords><keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Brain</term></keywords><keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Magnetic Resonance Imaging</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Magnetic Resonance Imaging</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Computer Simulation</term><term>Electromagnetic Fields</term><term>Equipment Design</term><term>Humans</term><term>Phantoms, Imaging</term><term>Radio Waves</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Champs électromagnétiques</term><term>Conception d'appareillage</term><term>Cuivre</term><term>Fantômes en imagerie</term><term>Humains</term><term>Imagerie par résonance magnétique</term><term>Ondes hertziennes</term><term>Simulation numérique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To optimize the design of radiofrequency (RF) shielding of transmit coils at 7T and reduce eddy currents generated on the RF shielding when imaging with rapid gradient waveforms.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25367703</PMID><DateCreated><Year>2015</Year><Month>10</Month><Day>23</Day></DateCreated><DateCompleted><Year>2016</Year><Month>08</Month><Day>15</Day></DateCompleted><DateRevised><Year>2017</Year><Month>02</Month><Day>20</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1522-2594</ISSN><JournalIssue CitedMedium="Internet"><Volume>74</Volume><Issue>5</Issue><PubDate><Year>2015</Year><Month>Nov</Month></PubDate></JournalIssue><Title>Magnetic resonance in medicine</Title><ISOAbbreviation>Magn Reson Med</ISOAbbreviation></Journal><ArticleTitle>Dual optimization method of radiofrequency and quasistatic field simulations for reduction of eddy currents generated on 7T radiofrequency coil shielding.</ArticleTitle><Pagination><MedlinePgn>1461-9</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/mrm.25424</ELocationID><Abstract><AbstractText Label="PURPOSE" NlmCategory="OBJECTIVE">To optimize the design of radiofrequency (RF) shielding of transmit coils at 7T and reduce eddy currents generated on the RF shielding when imaging with rapid gradient waveforms.</AbstractText><AbstractText Label="METHODS" NlmCategory="METHODS">One set of a four-element, 2 × 2 Tic-Tac-Toe head coil structure was selected and constructed to study eddy currents on the RF coil shielding. The generated eddy currents were quantitatively studied in the time and frequency domains. The RF characteristics were studied using the finite difference time domain method. Five different kinds of RF shielding were tested on a 7T MRI scanner with phantoms and in vivo human subjects.</AbstractText><AbstractText Label="RESULTS" NlmCategory="RESULTS">The eddy current simulation method was verified by the measurement results. Eddy currents induced by solid/intact and simple-structured slotted RF shielding significantly distorted the gradient fields. Echo-planar images, B1+ maps, and S matrix measurements verified that the proposed slot pattern suppressed the eddy currents while maintaining the RF characteristics of the transmit coil.</AbstractText><AbstractText Label="CONCLUSION" NlmCategory="CONCLUSIONS">The presented dual-optimization method could be used to design RF shielding and reduce the gradient field-induced eddy currents while maintaining the RF characteristics of the transmit coil.</AbstractText><CopyrightInformation>© 2014 Wiley Periodicals, Inc.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Zhao</LastName><ForeName>Yujuan</ForeName><Initials>Y</Initials><AffiliationInfo><Affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zhao</LastName><ForeName>Tiejun</ForeName><Initials>T</Initials><AffiliationInfo><Affiliation>Siemens Medical Solutions, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Raval</LastName><ForeName>Shailesh B</ForeName><Initials>SB</Initials><AffiliationInfo><Affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Krishnamurthy</LastName><ForeName>Narayanan</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zheng</LastName><ForeName>Hai</ForeName><Initials>H</Initials><AffiliationInfo><Affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Harris</LastName><ForeName>Chad T</ForeName><Initials>CT</Initials><AffiliationInfo><Affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Handler</LastName><ForeName>William B</ForeName><Initials>WB</Initials><AffiliationInfo><Affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Chronik</LastName><ForeName>Blaine A</ForeName><Initials>BA</Initials><AffiliationInfo><Affiliation>Department of Physics and Astronomy, University of Western Ontario, London, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ibrahim</LastName><ForeName>Tamer S</ForeName><Initials>TS</Initials><AffiliationInfo><Affiliation>Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Radiology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>R01 EB009848</GrantID><Acronym>EB</Acronym><Agency>NIBIB NIH HHS</Agency><Country>United States</Country></Grant><Grant><GrantID>R01EB009848</GrantID><Acronym>EB</Acronym><Agency>NIBIB NIH HHS</Agency><Country>United States</Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D052061">Research Support, N.I.H., Extramural</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>11</Month><Day>03</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Magn Reson Med</MedlineTA><NlmUniqueID>8505245</NlmUniqueID><ISSNLinking>0740-3194</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>789U1901C5</RegistryNumber><NameOfSubstance UI="D003300">Copper</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Phys Med Biol. 2013 Jun 21;58(12):4367-79</RefSource><PMID Version="1">23739174</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Magn Reson Med. 2013 Jul;70(1):259-68</RefSource><PMID Version="1">22887123</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Magn Reson Med. 1991 Aug;20(2):268-84</RefSource><PMID Version="1">1775052</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Magn Reson Med. 2006 Sep;56(3):620-9</RefSource><PMID Version="1">16894579</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>J Magn Reson. 2010 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MajorTopicYN="N">Humans</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008279" MajorTopicYN="N">Magnetic Resonance Imaging</DescriptorName><QualifierName UI="Q000295" MajorTopicYN="Y">instrumentation</QualifierName><QualifierName UI="Q000379" MajorTopicYN="Y">methods</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D019047" MajorTopicYN="N">Phantoms, Imaging</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D011846" MajorTopicYN="N">Radio Waves</DescriptorName></MeshHeading></MeshHeadingList><OtherID Source="NLM">NIHMS621635 [Available on 11/01/16]</OtherID><OtherID Source="NLM">PMC4515214 [Available on 11/01/16]</OtherID><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">7T MRI</Keyword><Keyword MajorTopicYN="N">RF shielding</Keyword><Keyword MajorTopicYN="N">Tic-Tac-Toe RF coil</Keyword><Keyword MajorTopicYN="N">echo-planar imaging</Keyword><Keyword MajorTopicYN="N">eddy current simulation</Keyword><Keyword MajorTopicYN="N">full wave RF simulation</Keyword><Keyword MajorTopicYN="N">gradient coil model</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>02</Month><Day>25</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2014</Year><Month>06</Month><Day>26</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>08</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>11</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>11</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2016</Year><Month>8</Month><Day>16</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">25367703</ArticleId><ArticleId IdType="doi">10.1002/mrm.25424</ArticleId><ArticleId 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| HfdSelect -Kh $EXPLOR_AREA/Data/PubMed/Curation/biblio.hfd \
| NlmPubMed2Wicri -a PittsburghV1
| This area was generated with Dilib version V0.6.38. |  |