A workflow for predicting temperature increase at the electrical contacts of deep brain stimulation electrodes undergoing MRI

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buir.contributor.authorErgin, Atalar
buir.contributor.orcidErgin, Atalar|0000-0002-6874-6103
dc.citation.epage2325en_US
dc.citation.issueNumber5en_US
dc.citation.spage2311en_US
dc.citation.volumeNumber88en_US
dc.contributor.authorTarakameh, A.R.
dc.contributor.authorZulkarnain, N.I.H.
dc.contributor.authorHe, X.
dc.contributor.authorAtalar, Ergin
dc.contributor.authorHarel, N.
dc.contributor.authorEryaman, Y.
dc.date.accessioned2023-02-16T08:08:00Z
dc.date.available2023-02-16T08:08:00Z
dc.date.issued2022-06-04
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractPurpose: The purpose of this study is to present a workflow for predicting the radiofrequency (RF) heating around the contacts of a deep brain stimulation (DBS) lead during an MRI scan. Methods: The induced RF current on the DBS lead accumulates electric charge on the metallic contacts, which may cause a high local specific absorption rate (SAR), and therefore, heating. The accumulated charge was modeled by imposing a voltage boundary condition on the contacts in a quasi-static electromagnetic (EM) simulation allowing thermal simulations to be performed with the resulting SAR distributions. Estimating SAR and temperature increases from a lead in vivo through EM simulation is not practical given anatomic differences and variations in lead geometry. To overcome this limitation, a new parameter, transimpedance, was defined to characterize a given lead. By combining the transimpedance, which can be measured in a single calibration scan, along with MR-based current measurements of the lead in a unique orientation and anatomy, local heating can be estimated. Heating determined with this approach was compared with results from heating studies of a commercial DBS electrode in a gel phantom with different lead configurations to validate the proposed method. Results: Using data from a single calibration experiment, the transimpedance of a commercial DBS electrode (directional lead, Infinity DBS system, Abbott Laboratories, Chicago, IL) was determined to be 88 Ω. Heating predictions using the DBS transimpedance and rapidly acquired MR-based current measurements in 26 different lead configurations resulted in a <23% (on average 11.3%) normalized root-mean-square error compared to experimental heating measurements during RF scans. Conclusion: In this study, a workflow consisting of an MR-based current measurement on the DBS lead and simple quasi-static EM/thermal simulations to predict the temperature increase around a DBS electrode undergoing an MRI scan is proposed and validated using a commercial DBS electrode. © 2022 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.en_US
dc.description.provenanceSubmitted by Aleyna Demirkıran (demirkiranaleyna99@gmail.com) on 2023-02-16T08:08:00Z No. of bitstreams: 1 A_workflow_for_predicting_temperature_increase_at_the_electrical_contacts_of_deep_brain_stimulation_electrodes_undergoing_MRI.pdf: 3957803 bytes, checksum: 594cdc4a8537040a74383f8b8371f952 (MD5)en
dc.description.provenanceMade available in DSpace on 2023-02-16T08:08:00Z (GMT). No. of bitstreams: 1 A_workflow_for_predicting_temperature_increase_at_the_electrical_contacts_of_deep_brain_stimulation_electrodes_undergoing_MRI.pdf: 3957803 bytes, checksum: 594cdc4a8537040a74383f8b8371f952 (MD5) Previous issue date: 2022-06-04en
dc.identifier.doi10.1002/mrm.29375en_US
dc.identifier.eissn1522-2594
dc.identifier.issn0740-3194
dc.identifier.urihttp://hdl.handle.net/11693/111409
dc.language.isoEnglishen_US
dc.publisherJohn Wiley & Sons, Ltden_US
dc.relation.isversionofhttps://doi.org/10.1002/mrm.29375en_US
dc.source.titleMagnetic Resonance in Medicineen_US
dc.subjectDeep brain stimulation safetyen_US
dc.subjectMRIen_US
dc.subjectRadiofrequency heatingen_US
dc.subjectTemperature predictionen_US
dc.titleA workflow for predicting temperature increase at the electrical contacts of deep brain stimulation electrodes undergoing MRIen_US
dc.typeArticleen_US

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