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dc.contributor.authorEryaman, Y.en_US
dc.contributor.authorTurk, E. A.en_US
dc.contributor.authorOto, C.en_US
dc.contributor.authorAlgin, O.en_US
dc.contributor.authorAtalar, E.en_US
dc.date.accessioned2016-02-08T09:40:11Z
dc.date.available2016-02-08T09:40:11Z
dc.date.issued2013en_US
dc.identifier.issn0740-3194
dc.identifier.urihttp://hdl.handle.net/11693/21044
dc.description.abstractIn this work, it is demonstrated that a dual-drive birdcage coil can be used to reduce the radiofrequency heating of metallic devices during magnetic resonance imaging. By controlling the excitation currents of the two channels of a birdcage coil, the radiofrequency current that is induced near the lead tip could be set to zero. To monitor the current, the image artifacts near the lead tips were measured. The electric field distribution was controlled using a dual-drive birdcage coil. With this method, the lead currents and the lead tip temperatures were reduced substantially [<0.3°C for an applied 4.4 W/kg SAR compared to >4.9°C using quadrature excitation], as demonstrated by phantom and animal experiments. The homogeneity of the flip angle distribution was preserved, as shown by volunteer experiments. The normalized root-mean-square error of the flip angle distribution was less than 10% for all excitations. The average specific absorption rate increased as a trade-off for using different excitation patterns. Copyright © 2012 Wiley Periodicals, Inc.en_US
dc.description.sponsorshipTUBITAKen_US
dc.language.isoEnglishen_US
dc.source.titleMagnetic Resonance in Medicineen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/mrm.24316en_US
dc.subjectRF safetyen_US
dc.subjectEquipment Designen_US
dc.subjectEquipment Failure Analysisen_US
dc.subjectHot Temperatureen_US
dc.subjectMagnetic Resonance Imagingen_US
dc.subjectMagneticsen_US
dc.subjectMetalsen_US
dc.subjectPhantoms, Imagingen_US
dc.subjectProstheses and Implantsen_US
dc.titleReduction of the radiofrequency heating of metallic devices using a dual‐drive birdcage coilen_US
dc.typeArticleen_US
dc.departmentNational Magnetic Resonance Research Centeren_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage845en_US
dc.citation.epage852en_US
dc.citation.volumeNumber69en_US
dc.citation.issueNumber3en_US
dc.identifier.doi10.1002/mrm.24316en_US
dc.publisherWileyen_US


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