1. Finite Difference Transmission Line model for the design of safe multi-sections cables in MRI
- Author
-
Missoffe, Alexia, Imagerie Adaptative Diagnostique et Interventionnelle (IADI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lorraine (UL), Région LorraineFEDER, SpinE, Université de Lorraine (UL)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Missoffe, Alexia
- Subjects
phase effects ,[SPI.ELEC] Engineering Sciences [physics]/Electromagnetism ,MRI safety ,[MATH.MATH-NA] Mathematics [math]/Numerical Analysis [math.NA] ,Radiofréquence ,[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism ,radiofrequency ,cables ,transfer function ,[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP] ,[MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP] ,sécurité IRM ,pacemaker leads ,[MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA] - Abstract
Purpose: To show the relevance of a simple finite difference transmission line model for help in the design of safe cables in 1.5 T MRI’s using the multi-section cable approach. Methods: A two section wire will be studied as a function of the length of the two different sections. The result concerning the heating of the electrodes for a constant electrical field excitation along the wire as well as the estimation of the correction phase factor will be compared to full-wave simulation results. Such information allows estimation of the worst case heating of the cable in MRI taking into account the phase effects.Results: The transmission line predicts correctly the full-wave simulation results. The optimum length of the second section reduces by 37% the worst case heating at the electrode compared to the best case unique section wire.Conclusion: The multi-section cable design can reduce the heating of cables in MRI taking into account the phase effects. The finite difference transmission line model presented is a simple valuable tool to estimate the worst case heating of multi-section cables thus helping to optimize the design of such cables.
- Published
- 2017