Matériels et méthodes pour le développement de câbles compatibles IRM

Abstract : Magnetic Resonance Imaging (MRI) is an established imaging technique for medical diagnostics but could expose patients with active medical devices to risks that need to be studied and minimized. In fact, these devices encompass conductive and/or magnetic materials which interact with the electromagnetic field of the MRI. When these devices contain leads, MRI induced energy within the lead is considered to be one of the most problematic interaction as it can lead to stimulations, malfunction or burns. The first goal of this thesis is to create tools to study and quantify the electromagnetic interactions between an MRI and a lead. This has led to the design of novel MRI compatible sensors that measure induced voltage within leads connected active medical device entry terminals. Experimental MRI set-ups were also developed to simulate the MRI’s electromagnetic field. The second goal of this thesis is to design new leads that are minimally affected by the MRI’s electromagnetic field. Two proofs of concept were achieved. On the one hand, a lead capable of reducing MRI induced energy thanks to its winding was made. On the second hand, a second lead with a thin conductor and impedance mismatches along its length was created
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https://hal.univ-lorraine.fr/tel-01928517
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Submitted on : Tuesday, November 20, 2018 - 3:41:25 PM
Last modification on : Wednesday, November 21, 2018 - 1:18:16 AM

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  • HAL Id : tel-01928517, version 1

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Thérèse Barbier. Matériels et méthodes pour le développement de câbles compatibles IRM. Médecine humaine et pathologie. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0313⟩. ⟨tel-01928517⟩

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