Coupled transfer function model for the evaluation of implanted cables safety in MRI.
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| Title: | Coupled transfer function model for the evaluation of implanted cables safety in MRI. |
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| Authors: | Kabil, Julie1 (AUTHOR), Felblinger, Jacques1,2 (AUTHOR), Vuissoz, Pierre‐André1 (AUTHOR), Missoffe, Alexia1 (AUTHOR) alexia.missoffe@univ-lorraine.fr |
| Source: | Magnetic Resonance in Medicine. Aug2020, Vol. 84 Issue 2, p991-999. 9p. |
| Subjects: | Transfer functions, Artificial implants, Additive functions, Cables, Radio frequency therapy |
| Abstract: | Purpose: Multiple medical‐device leads implanted next to each other are often encountered in clinical practice. The aim of this work is to study a coupled transfer function model to evaluate the safety of these coupled leads submitted to the RF field of a 1.5T MRI scanner for a constant distance between both leads. Methods: The effect of coupling on the heating of 2 cables with different termination conditions is evaluated experimentally. The coupled and single transfer functions are determined experimentally and used to predict the relative temperature increases of both cables alone and coupled. Two different coupled models, an additive model and a global model, are proposed. The coupled transfer functions are also simulated. Results: The coupling between cables has a strong influence on the resulting heating at the electrodes. The coupled additive transfer function model is a relevant tool to evaluate the heating of coupled leads separated by a constant distance. The global model underestimates the heating in one of the coupled cases by about 30%. The measured coupled transfer functions coincide with the simulated models. Conclusion: It is necessary to take into account the coupling effect between leads to evaluate the safety of implanted devices. This work shows that, in the case of 2 cables separated by a constant distance, that an experimentally determined coupled transfer function allows estimation of the heating of the 2 electrodes for a given incident field. Further work should take into account the in vivo varying distance between the 2 cables. [ABSTRACT FROM AUTHOR] |
| Copyright of Magnetic Resonance in Medicine is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 142847535 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Coupled transfer function model for the evaluation of implanted cables safety in MRI. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kabil%2C+Julie%22">Kabil, Julie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Felblinger%2C+Jacques%22">Felblinger, Jacques</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vuissoz%2C+Pierre‐André%22">Vuissoz, Pierre‐André</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Missoffe%2C+Alexia%22">Missoffe, Alexia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> alexia.missoffe@univ-lorraine.fr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+in+Medicine%22">Magnetic Resonance in Medicine</searchLink>. Aug2020, Vol. 84 Issue 2, p991-999. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Transfer+functions%22">Transfer functions</searchLink><br /><searchLink fieldCode="DE" term="%22Artificial+implants%22">Artificial implants</searchLink><br /><searchLink fieldCode="DE" term="%22Additive+functions%22">Additive functions</searchLink><br /><searchLink fieldCode="DE" term="%22Cables%22">Cables</searchLink><br /><searchLink fieldCode="DE" term="%22Radio+frequency+therapy%22">Radio frequency therapy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Purpose: Multiple medical‐device leads implanted next to each other are often encountered in clinical practice. The aim of this work is to study a coupled transfer function model to evaluate the safety of these coupled leads submitted to the RF field of a 1.5T MRI scanner for a constant distance between both leads. Methods: The effect of coupling on the heating of 2 cables with different termination conditions is evaluated experimentally. The coupled and single transfer functions are determined experimentally and used to predict the relative temperature increases of both cables alone and coupled. Two different coupled models, an additive model and a global model, are proposed. The coupled transfer functions are also simulated. Results: The coupling between cables has a strong influence on the resulting heating at the electrodes. The coupled additive transfer function model is a relevant tool to evaluate the heating of coupled leads separated by a constant distance. The global model underestimates the heating in one of the coupled cases by about 30%. The measured coupled transfer functions coincide with the simulated models. Conclusion: It is necessary to take into account the coupling effect between leads to evaluate the safety of implanted devices. This work shows that, in the case of 2 cables separated by a constant distance, that an experimentally determined coupled transfer function allows estimation of the heating of the 2 electrodes for a given incident field. Further work should take into account the in vivo varying distance between the 2 cables. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Magnetic Resonance in Medicine is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/mrm.28146 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 991 Subjects: – SubjectFull: Transfer functions Type: general – SubjectFull: Artificial implants Type: general – SubjectFull: Additive functions Type: general – SubjectFull: Cables Type: general – SubjectFull: Radio frequency therapy Type: general Titles: – TitleFull: Coupled transfer function model for the evaluation of implanted cables safety in MRI. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kabil, Julie – PersonEntity: Name: NameFull: Felblinger, Jacques – PersonEntity: Name: NameFull: Vuissoz, Pierre‐André – PersonEntity: Name: NameFull: Missoffe, Alexia IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 07403194 Numbering: – Type: volume Value: 84 – Type: issue Value: 2 Titles: – TitleFull: Magnetic Resonance in Medicine Type: main |
| ResultId | 1 |
