A simple analytical expression for the gradient induced potential on active implants during MRI
buir.contributor.author | Atalar, Ergin | |
dc.citation.epage | 2851 | en_US |
dc.citation.issueNumber | 10 | en_US |
dc.citation.spage | 2845 | en_US |
dc.citation.volumeNumber | 59 | en_US |
dc.contributor.author | Turk, E.A. | en_US |
dc.contributor.author | Kopanoglu, E. | en_US |
dc.contributor.author | Guney, S. | en_US |
dc.contributor.author | Bugdayci, K.E. | en_US |
dc.contributor.author | Ider, Y. Z. | en_US |
dc.contributor.author | Erturk, V. B. | en_US |
dc.contributor.author | Atalar, Ergin | en_US |
dc.date.accessioned | 2016-02-08T09:44:45Z | |
dc.date.available | 2016-02-08T09:44:45Z | |
dc.date.issued | 2012 | en_US |
dc.department | Department of Electrical and Electronics Engineering | en_US |
dc.department | National Magnetic Resonance Research Center (UMRAM) | en_US |
dc.description.abstract | During 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.provenance | Made 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: 2012 | en |
dc.identifier.doi | 10.1109/TBME.2012.2212190 | en_US |
dc.identifier.issn | 0189-294 | |
dc.identifier.uri | http://hdl.handle.net/11693/21323 | |
dc.language.iso | English | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1109/TBME.2012.2212190 | en_US |
dc.source.title | IEEE Transactions on Biomedical Engineering | en_US |
dc.subject | Active implantable medical devices (AIMD) | en_US |
dc.subject | Gradient fields | en_US |
dc.subject | Magnetic resonance imaging (MRI) | en_US |
dc.subject | Stimulation risk | en_US |
dc.subject | Active implants | en_US |
dc.subject | Analytical expressions | en_US |
dc.subject | Closed form | en_US |
dc.subject | Cylindrical phantoms | en_US |
dc.subject | Gradient coil | en_US |
dc.subject | Gradient fields | en_US |
dc.subject | Implantable medical devices | en_US |
dc.subject | Simplified expressions | en_US |
dc.subject | Time-varying magnetic fields | en_US |
dc.subject | Volume of interest | en_US |
dc.subject | Electric fields | en_US |
dc.subject | Magnetic fields | en_US |
dc.subject | Magnetic resonance imaging | en_US |
dc.subject | Biomedical equipment | en_US |
dc.subject | lead | en_US |
dc.subject | Animal tissue | en_US |
dc.subject | Anura | en_US |
dc.subject | Article | en_US |
dc.subject | Electric field | en_US |
dc.subject | Electrode | en_US |
dc.subject | Implant | en_US |
dc.subject | Leg | en_US |
dc.subject | Magnetic field | en_US |
dc.subject | Nonhuman | en_US |
dc.subject | Nuclear magnetic resonance imaging | en_US |
dc.subject | Stimulus response | en_US |
dc.subject | Validity | en_US |
dc.subject | Animals | en_US |
dc.subject | Anura | en_US |
dc.subject | Electromagnetic fields | en_US |
dc.subject | Extremities | en_US |
dc.subject | Magnetic resonance imaging | en_US |
dc.subject | Models, biological | en_US |
dc.subject | Phantoms, imaging | en_US |
dc.subject | Prostheses and implants | en_US |
dc.subject | Signal Processing, computer-assisted | en_US |
dc.title | A simple analytical expression for the gradient induced potential on active implants during MRI | en_US |
dc.type | Article | en_US |
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