Magnetic resonance imaging assisted by wireless passive implantable fiducial e-markers

Simple item page
buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.authorAtalar, Ergin
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage19702en_US
dc.citation.spage19693en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorGokyar, S.en_US
dc.contributor.authorAlipour, A.en_US
dc.contributor.authorUnal, E.en_US
dc.contributor.authorAtalar, Erginen_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2018-04-12T11:03:23Z
dc.date.available2018-04-12T11:03:23Z
dc.date.issued2017en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractThis paper reports a wireless passive resonator architecture that is used as a fiducial electronic marker (e-marker) intended for internal marking purposes in magnetic resonance imaging (MRI). As a proof-of-concept demonstration, a class of double-layer, sub-cm helical resonators were microfabricated and tuned to the operating frequency of 123 MHz for a three T MRI system. Effects of various geometrical parameters on the resonance frequency of the e-marker were studied, and the resulting specific absorption rate (SAR) increase was analyzed using a full-wave microwave solver. The B1 + field distribution was calculated, and experimental results were compared. As an exemplary application to locate subdural electrodes, these markers were paired with subdural electrodes. It was shown that such sub-cm self-resonant e-markers with biocompatible constituents can be designed and used for implant marking, with sub-mm positioning accuracy, in MRI. In this application, a free-space quality factor ( Q -factor) of approximately 50 was achieved for the proposed resonator architecture. However, this structure caused an SAR increase in certain cases, which limits its usage for in vivo imaging practices. The findings indicate that these implantable resonators hold great promise for wireless fiducial e-marking in MRI as an alternative to multimodal imaging.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T11:03:23Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017en
dc.identifier.doi10.1109/ACCESS.2017.2752649en_US
dc.identifier.eissn2169-3536en_US
dc.identifier.urihttp://hdl.handle.net/11693/37122
dc.language.isoEnglishen_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.relation.isversionofhttps://doi.org/10.1109/ACCESS.2017.2752649en_US
dc.source.titleIEEE Accessen_US
dc.subjectFiducial e-markersen_US
dc.subjectImplantsen_US
dc.subjectMagnetic resonance imagingen_US
dc.subjectWireless resonatorsen_US
dc.subjectBiocompatibilityen_US
dc.subjectDental prosthesesen_US
dc.subjectElectrodesen_US
dc.subjectGeometrical opticsen_US
dc.subjectGeometryen_US
dc.subjectMagnetismen_US
dc.subjectQ factor measurementen_US
dc.subjectRadar imagingen_US
dc.subjectResonanceen_US
dc.subjectResonatorsen_US
dc.subjectFiducial e-markersen_US
dc.subjectField distributionen_US
dc.subjectImplantable resonatorsen_US
dc.subjectMulti-modal imagingen_US
dc.subjectOperating frequencyen_US
dc.subjectPositioning accuracyen_US
dc.subjectResonance frequenciesen_US
dc.subjectSpecific absorption rateen_US
dc.subjectMagnetic resonance imagingen_US
dc.titleMagnetic resonance imaging assisted by wireless passive implantable fiducial e-markersen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Magnetic Resonance Imaging Assisted by Wireless Passive Implantable Fiducial e-Markers.pdf
Size:
9.39 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download

Collections

Scholarly Publications - UNAM
Scholarly Publications - Electrical and Electronics Engineering
Scholarly Publications - NANOTAM