New transmission line model of an insulated cable embedded in gel for MRI radiofrequency interaction hazard evaluation as an alternative to the transfer function model - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2017

New transmission line model of an insulated cable embedded in gel for MRI radiofrequency interaction hazard evaluation as an alternative to the transfer function model

Résumé

Object: To demonstrate the possibility to model the power deposited at the electrode of an insulated cable in gel at 64MHz with a transmission line model with a strictly passive electrode model. This offers a more related to physics alternative to the transfer function model. The equivalence between both models is shown. Materials and Methods: In a first step, the possibility of modeling an insulated cable with a transmission line model was analyzed through full-wave numerical simulations. An electrode model that has a physical meaning was proposed. The transmission line model predictions were confronted to experimental and simulated data of the transfer function of a cable and of the resonant behavior as a function of length of cables with different termination conditions. Results: The assumption of a transmission line model which underlies the transfer function model is right for a simple cable embedded in tissue imitating gel. A transmission line model extracted from a transfer function allows to predict the resonant behavior of two cables with different termination conditions. Conclusion: A transmission line model of an insulated cable embedded in tissue imitating gel offers a more directly related to physics alternative to the transfer function model.
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Dates et versions

hal-01494478 , version 1 (23-03-2017)
hal-01494478 , version 2 (14-02-2018)

Identifiants

  • HAL Id : hal-01494478 , version 1

Citer

Alexia Missoffe. New transmission line model of an insulated cable embedded in gel for MRI radiofrequency interaction hazard evaluation as an alternative to the transfer function model. 2017. ⟨hal-01494478v1⟩
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