A simple analytical expression for the gradient induced potential on active implants during MRI

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buir.contributor.authorAtalar, Ergin
dc.citation.epage2851en_US
dc.citation.issueNumber10en_US
dc.citation.spage2845en_US
dc.citation.volumeNumber59en_US
dc.contributor.authorTurk, E.A.en_US
dc.contributor.authorKopanoglu, E.en_US
dc.contributor.authorGuney, S.en_US
dc.contributor.authorBugdayci, K.E.en_US
dc.contributor.authorIder, Y. Z.en_US
dc.contributor.authorErturk, V. B.en_US
dc.contributor.authorAtalar, Erginen_US
dc.date.accessioned2016-02-08T09:44:45Z
dc.date.available2016-02-08T09:44:45Z
dc.date.issued2012en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.description.abstractDuring magnetic resonance imaging, there is an interaction between the time-varying magnetic fields and the active implantable medical devices (AIMD). In this study, in order to express the nature of this interaction, simplified analytical expressions for the electric fields induced by time-varying magnetic fields are derived inside a homogeneous cylindrical volume. With these analytical expressions, the gradient induced potential on the electrodes of the AIMD can be approximately calculated if the position of the lead inside the body is known. By utilizing the fact that gradient coils produce linear magnetic field in a volume of interest, the simplified closed form electric field expressions are defined. Using these simplified expressions, the induced potential on an implant electrode has been computed approximately for various lead positions on a cylindrical phantom and verified by comparing with the measured potentials for these sample conditions. In addition, the validity of the method was tested with isolated frog leg stimulation experiments. As a result, these simplified expressions may help in assessing the gradient-induced stimulation risk to the patients with implants.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T09:44:45Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2012en
dc.identifier.doi10.1109/TBME.2012.2212190en_US
dc.identifier.issn0189-294
dc.identifier.urihttp://hdl.handle.net/11693/21323
dc.language.isoEnglishen_US
dc.relation.isversionofhttp://dx.doi.org/10.1109/TBME.2012.2212190en_US
dc.source.titleIEEE Transactions on Biomedical Engineeringen_US
dc.subjectActive implantable medical devices (AIMD)en_US
dc.subjectGradient fieldsen_US
dc.subjectMagnetic resonance imaging (MRI)en_US
dc.subjectStimulation risken_US
dc.subjectActive implantsen_US
dc.subjectAnalytical expressionsen_US
dc.subjectClosed formen_US
dc.subjectCylindrical phantomsen_US
dc.subjectGradient coilen_US
dc.subjectGradient fieldsen_US
dc.subjectImplantable medical devicesen_US
dc.subjectSimplified expressionsen_US
dc.subjectTime-varying magnetic fieldsen_US
dc.subjectVolume of interesten_US
dc.subjectElectric fieldsen_US
dc.subjectMagnetic fieldsen_US
dc.subjectMagnetic resonance imagingen_US
dc.subjectBiomedical equipmenten_US
dc.subjectleaden_US
dc.subjectAnimal tissueen_US
dc.subjectAnuraen_US
dc.subjectArticleen_US
dc.subjectElectric fielden_US
dc.subjectElectrodeen_US
dc.subjectImplanten_US
dc.subjectLegen_US
dc.subjectMagnetic fielden_US
dc.subjectNonhumanen_US
dc.subjectNuclear magnetic resonance imagingen_US
dc.subjectStimulus responseen_US
dc.subjectValidityen_US
dc.subjectAnimalsen_US
dc.subjectAnuraen_US
dc.subjectElectromagnetic fieldsen_US
dc.subjectExtremitiesen_US
dc.subjectMagnetic resonance imagingen_US
dc.subjectModels, biologicalen_US
dc.subjectPhantoms, imagingen_US
dc.subjectProstheses and implantsen_US
dc.subjectSignal Processing, computer-assisteden_US
dc.titleA simple analytical expression for the gradient induced potential on active implants during MRIen_US
dc.typeArticleen_US

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